Tschermakite
A valid IMA mineral species
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About Tschermakite
Formula:
â»(Ca2)(Mg3Al2)(Al2Si6O22)(OH)2
Colour:
Medium green to dark green to green-black to black, brown (rare).
Lustre:
Vitreous
Hardness:
5 - 6
Specific Gravity:
3.15
Crystal System:
Monoclinic
Member of:
Name:
Named in honor of Gustav Tschermak von Sessenegg (19 April 1836, Littau, Moravia (now Czech Republic) - 4 May 1927, Vienna), Austrian mineralogist at the University of Vienna. He specialized in silicate minerals and meteorites. He established the journal Mineralogische Mitteilungen (Mineralogical Reports). The mineral silvialite is named after his daughter.
Tschermakite is defined as a Tschermakite Group member with Mg>Fe2+ and Al>Fe3+ in the C position. Tschermakite has been redefined in the 2012 Amphibole nomenclature in that:
1) The formula is changed from â(Ca2)(Mg3AlFe3+)(Al2Si6O22)(OH)2 to â(Ca2)(Mg3Al2)(Al2Si6O22)(OH)2. Consequently all pre-2012 literature references to tschermakite should be checked to verify that Al>Fe3+ in the C position. If Fe3+>Al in the C position the material will be ferri-tschermakite.
2) The tschermakite group is in the 2012 nomenclature defined with C(Al+Fe3++2Ti)> 1.5 apfu, whereas the pre-2012 definition was defined with 5.5 < Si < 6.5 apfu. This redefinition does not change the formula, but many amphiboles qualifying as tschermakite pre-2012 will now be ferro-hornblende or ferro-ferrihornblende.
It should also be noted that pre-1978 tschermakite was defined with A+B(Na+K+Ca)<2.5. As tschermakite often contains less than 2 apfu Ca, older literature may describe amphiboles with A(Na+K)>0.5 as tschermakites. These are now considered pargasites.
NOTES:
- Amphiboles from Longido District, Arusha Region, Tanzania are still erroneously labeled tschermakite or alumino-tschermakite. The identification of these amphiboles as pargasite are well documented by Simonet, Cedric (2000) and others.
- The tschermakite end-member composition is unstable, and most analyzed samples are close to one or more of the tschermakite/hastingsite/pargasite/sadanagaite joins. Any tschermakite specimen should therefore be analysed with qualitative chemical analysis (EMPA minimum, ideally in combination with Mössbauer spectroscopy).
1) The formula is changed from â(Ca2)(Mg3AlFe3+)(Al2Si6O22)(OH)2 to â(Ca2)(Mg3Al2)(Al2Si6O22)(OH)2. Consequently all pre-2012 literature references to tschermakite should be checked to verify that Al>Fe3+ in the C position. If Fe3+>Al in the C position the material will be ferri-tschermakite.
2) The tschermakite group is in the 2012 nomenclature defined with C(Al+Fe3++2Ti)> 1.5 apfu, whereas the pre-2012 definition was defined with 5.5 < Si < 6.5 apfu. This redefinition does not change the formula, but many amphiboles qualifying as tschermakite pre-2012 will now be ferro-hornblende or ferro-ferrihornblende.
It should also be noted that pre-1978 tschermakite was defined with A+B(Na+K+Ca)<2.5. As tschermakite often contains less than 2 apfu Ca, older literature may describe amphiboles with A(Na+K)>0.5 as tschermakites. These are now considered pargasites.
NOTES:
- Amphiboles from Longido District, Arusha Region, Tanzania are still erroneously labeled tschermakite or alumino-tschermakite. The identification of these amphiboles as pargasite are well documented by Simonet, Cedric (2000) and others.
- The tschermakite end-member composition is unstable, and most analyzed samples are close to one or more of the tschermakite/hastingsite/pargasite/sadanagaite joins. Any tschermakite specimen should therefore be analysed with qualitative chemical analysis (EMPA minimum, ideally in combination with Mössbauer spectroscopy).
Unique Identifiers
Mindat ID:
4035
Long-form identifier:
mindat:1:1:4035:4
GUID
(UUID V4):
(UUID V4):
96b0427d-9a82-4f2f-a3b8-dee6baac2f8b
IMA Classification of Tschermakite
Approved
IMA status notes:
Renamed by the IMA
IMA Formula:
â»Ca2(Mg3Al2)(Si6Al2)O22(OH)2
Approval history:
Renamed by IMA: 2012
Classification of Tschermakite
9.DE.10
9 : SILICATES (Germanates)
D : Inosilicates
E : Inosilicates with 2-periodic double chains, Si4O11; Clinoamphiboles
9 : SILICATES (Germanates)
D : Inosilicates
E : Inosilicates with 2-periodic double chains, Si4O11; Clinoamphiboles
16.11.4
16 : Silicates Containing Aluminum and other Metals
11 : Aluminosilicates of Ca and Mg with or without alkalis
16 : Silicates Containing Aluminum and other Metals
11 : Aluminosilicates of Ca and Mg with or without alkalis
Mineral Symbols
As of 2021 there are now IMAâCNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMAâCNMNC symbol. Older variants are listed for historical use only.
Please only use the official IMAâCNMNC symbol. Older variants are listed for historical use only.
Symbol | Source | Reference |
---|---|---|
Tsr | IMAâCNMNC | Warr, L.N. (2021). IMAâCNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Ts | Kretz (1983) | Kretz, R. (1983) Symbols of rock-forming minerals. American Mineralogist, 68, 277â279. |
Ts | Siivolam & Schmid (2007) | Siivolam, J. and Schmid, R. (2007) Recommendations by the IUGS Subcommission on the Systematics of Metamorphic Rocks: List of mineral abbreviations. Web-version 01.02.07. IUGS Commission on the Systematics in Petrology. download |
Ts | Whitney & Evans (2010) | Whitney, D.L. and Evans, B.W. (2010) Abbreviations for names of rock-forming minerals. American Mineralogist, 95, 185â187 doi:10.2138/am.2010.3371 |
Ts | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Physical Properties of Tschermakite
Vitreous
Transparency:
Transparent
Colour:
Medium green to dark green to green-black to black, brown (rare).
Streak:
Pale grey-green
Hardness:
5 - 6 on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
on {110}
on {110}
Parting:
on {100}{001}
Density:
3.15 g/cm3 (Measured) 3.25 g/cm3 (Calculated)
Optical Data of Tschermakite
Type:
Biaxial (-)
RI values:
nα = 1.623 - 1.660 nβ = 1.630 - 1.680 nγ = 1.638 - 1.688
2V:
Measured: 60° to 90°
Max Birefringence:
δ = 0.015 - 0.028
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r > v strong
Pleochroism:
Visible
Comments:
In browns and greens
Chemistry of Tschermakite
Mindat Formula:
â»(Ca2)(Mg3Al2)(Al2Si6O22)(OH)2
Common Impurities:
Ti,Mn,Na,K,H2O,Fe
Chemical Analysis
Oxide wt%:
1 | |
---|---|
P2O5 | 0.02 % |
SiO2 | 42.86 % |
TiO2 | 0.14 % |
Al2O3 | 17.79 % |
V2O3 | 0.01 % |
Cr2O3 | 0.14 % |
Mn2O3* | 0.14 % |
Fe2O3* | 8.83 % |
NiO | 0.03 % |
MgO | 14.05 % |
CaO | 10.99 % |
SrO | 0.02 % |
Na2O | 1.86 % |
K2O | 0.17 % |
H2O (by stoichiometry) | 2.08 % |
Total: | 99.13 % |
Empirical formulas:
Sample ID | Empirical Formula |
---|---|
1 | (Na0.18K0.03â»0.79)(Ca1.67Na0.33)(Mg2.97Al1.04Fe3+0.94Mn3+0.02Cr0.02Ti0.02)[Si6.07Al1.93O22]([OH]1.97O0.03) |
Sample references:
ID | Locality | Reference | Notes |
---|---|---|---|
1 | Corundum locality, Anavoha South, Fotadrevo, Ampanihy District, Atsimo-Andrefana, Madagascar | Frank K. Mazdab collectionsample FKM-24; https://www.rockptx.com/fkm-1-to-fkm-25/#FKM-24 | corundum-bearing amphibolite (tschermakite+anorthite); amphibole normalized to 13eCNK; as a result of the normalization scheme, Fe and minor Mn calculated as Fe2O3 and Mn2O3 to satisfy charge balance. W-site O calculated as 2*normalized Ti. |
Crystallography of Tschermakite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C2/m
Cell Parameters:
a = 9.762(6) Å, b = 17.994(12) Å, c = 5.325(6) Å
β = 105.10(8)°
β = 105.10(8)°
Ratio:
a:b:c = 0.543 : 1 : 0.296
Unit Cell V:
903.08 Ă
Âł (Calculated from Unit Cell)
Z:
2
Morphology:
Prismatic crystals, reaction rims on other minerals.
Twinning:
single or multiple parallel to {100}
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0006297 | Tschermakite | Abdu Y A, Hawthorne F C (2009) Crystal structure and Mossbauer spectroscopy of tschermakite from the ruby locality at Fiskenaesset, Greenland The Canadian Mineralogist 47 917-926 | 2009 | Fiskenaesset, Greenland | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
- Ă | () |
Comments:
No published X-ray powder diffraction data.
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 2: Planetesimal differentiation and alteration | 4.566-4.550 |
6 : Secondary asteroid phases | 4.566-4.560 |
Stage 3a: Earthâs earliest Hadean crust | >4.50 |
7 : Ultramafic igneous rocks | |
8 : Mafic igneous rocks | |
Stage 5: Initiation of plate tectonics | <3.5-2.5 |
39 : High-đ metamorphism (blueschist, eclogite, ultrahigh đ facies) | |
40 : Regional metamorphism (greenschist, amphibolite, granulite facies) |
Geological Setting:
Eclogites and other ultramafic rocks, amphibolites or other medium to high grade metamorphic rocks.
Synonyms of Tschermakite
Other Language Names for Tschermakite
Relationship of Tschermakite to other Species
Member of:
Other Members of this group:
Ferri-tschermakite | â»{Ca2}{Mg3Fe3+2}(Al2Si6O22)(OH)2 | Mon. |
Ferro-tschermakite | â»{Ca2}{Fe2+3Al2}(Al2Si6O22)(OH)2 | Mon. 2/m : B2/m |
Forms a series with:
Common Associates
Associated Minerals Based on Photo Data:
3 photos of Tschermakite associated with Zoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
3 photos of Tschermakite associated with Ruby | Al2O3 |
1 photo of Tschermakite associated with Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
1 photo of Tschermakite associated with Almandine-Pyrope Series | |
1 photo of Tschermakite associated with Corundum | Al2O3 |
1 photo of Tschermakite associated with Anorthite | Ca(Al2Si2O8) |
Related Minerals - Strunz-mindat Grouping
9.DE. | Clino-suenoite | â»{Mn2+2}{Mg5}(Si8O22)(OH)2 |
9.DE. | Scandio-winchite | â»(NaCa)(Mg4Sc)(Si8O22)(OH)2 |
9.DE. | Mangani-eckermannite | NaNa2(Mg4Mn3+)Si8O22(OH)2 |
9.DE.05 | Cummingtonite | â»{Mg2}{Mg5}(Si8O22)(OH)2 |
9.DE.05 | Clino-holmquistite Root Name Group | â»{Li2}{Z2+3Z3+2}(Si8O22)(OH,F,Cl)2 |
9.DE.05 | Grunerite | â»{Fe2+2}{Fe2+5}(Si8O22)(OH)2 |
9.DE.05 | Permanganogrunerite | â»{Mn2+2}{Mn2+5}(Si8O22)(OH)2 |
9.DE.05 | Ferri-fluoro-leakeite | {Na}{Na2}{Mg2Fe3+2Li}(Si8O22)F2 |
9.DE.10 | Actinolite | â»Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
9.DE.10 | Ferro-ferri-tschermakite | â»{Ca2}{Fe2+3Fe3+2}(Al2Si6O22)(OH)2 |
9.DE.10 | Ferri-tschermakite | â»{Ca2}{Mg3Fe3+2}(Al2Si6O22)(OH)2 |
9.DE.10 | Ferro-actinolite | â»Ca2Fe2+5(Si8O22)(OH)2 |
9.DE.10 | Ferro-hornblende | â»Ca2(Fe2+4Al)(Si7Al)O22(OH)2 |
9.DE.10 | Ferro-tschermakite | â»{Ca2}{Fe2+3Al2}(Al2Si6O22)(OH)2 |
9.DE.10 | Joesmithite | Pb2+Ca2(Mg3Fe3+2)(Si6Be2)O22(OH)2 |
9.DE.10 | Magnesio-hornblende | â»Ca2(Mg4Al)(Si7Al)O22(OH)2 |
9.DE.10 | Tremolite | â»Ca2Mg5(Si8O22)(OH)2 |
9.DE.10 | Cannilloite | CaCa2(Mg4Al)(Si5Al3O22)OH2 |
9.DE.10 | Fluoro-cannilloite | CaCa2(Mg4Al)(Si5Al3)O22F2 |
9.DE.10 | Parvo-manganotremolite | â»{CaMn2+}{Mg5}(Si8O22)(OH)2 |
9.DE.10 | Fluoro-tremolite | â»Ca2Mg5(Si8O22)F2 |
9.DE.10 | Magnesio-fluoro-hornblende | â»Ca2Mg5(AlSi7O22)F2 |
9.DE.10 | Ferro-fluoro-hornblende | â»Ca2(Fe2+4Al)(AlSi7O22)F2 |
9.DE.10 | Ferro-ferri-hornblende | â»Ca2(Fe2+4Fe3+)(AlSi7O22)(OH)2 |
9.DE.10 | Magnesio-ferri-hornblende | â»Ca2(Mg4Fe3+)[(Si7Al)O22](OH)2 |
9.DE.10 | Ferro-cannilloite | CaCa2(Fe2+4Al)(Si5Al3O22)OH2 |
9.DE.10 | Ferro-ferri-cannilloite | CaCa2(Fe2+4Fe3+)(Si5Al3O22)OH2 |
9.DE.10 | Ferro-fluoro-actinolite | â»{Ca2}{Fe5}(Si8O22)F2 |
9.DE.10 | Magnesio-ferri-fluoro-hornblende | â»Ca2(Mg4Fe3+)(AlSi7O22)F2 |
9.DE.10 | Ferro-ferri-fluoro-hornblende | â»Ca2(Fe2+4Fe3+)(AlSi7O22)F2 |
9.DE.10 | Ferri-fluoro-tschermakite | â»{Ca2}{Mg3Fe3+2}(Al2Si6O22)F2 |
9.DE.10 | Ferro-ferri-fluoro-tschermakite | â»{Ca2}{Fe2+3Fe3+2}(Al2Si6O22)F2 |
9.DE.10 | Ferro-fluoro-tschermakite | â»{Ca2}{Fe2+3Al2}(Al2Si6O22)F2 |
9.DE.10 | Fluoro-tschermakite | â»{Ca2}{Mg3Al2}(Al2Si6O22)F2 |
9.DE.10 | Clino-ferro-suenoite | â»{Mn2+2}{Fe2+5}(Si8O22)(OH)2 |
9.DE.15 | Edenite | NaCa2Mg5(Si7Al)O22(OH)2 |
9.DE.15 | Ferro-edenite | NaCa2Fe2+5(Si7Al)O22(OH)2 |
9.DE.15 | Ferro-kaersutite | NaCa2{Fe2+3AlTi}(Si6Al2O22)O2 |
9.DE.15 | Ferro-pargasite | NaCa2(Fe2+4Al)(Si6Al2)O22(OH)2 |
9.DE.15 | Hastingsite | NaCa2(Fe2+4Fe3+)(Si6Al2)O22(OH)2 |
9.DE.15 | Kaersutite | NaCa2(Mg3AlTi4+)(Si6Al2)O22O2 |
9.DE.15 | Magnesio-hastingsite | NaCa2(Mg4Fe3+)(Si6Al2)O22(OH)2 |
9.DE.15 | Pargasite | NaCa2(Mg4Al)(Si6Al2)O22(OH)2 |
9.DE.15 | Sadanagaite | {Na}{Ca2}{Mg3Al2}(Si5Al3O22)(OH)2 |
9.DE.15 | Fluoro-edenite | NaCa2Mg5(Si7Al)O22F2 |
9.DE.15 | Potassic-ferro-ferri-sadanagaite | {K}{Ca2}{Fe2+3Fe3+2}(Al3Si5O22)(OH)2 |
9.DE.15 | Ferro-ferri-sadanagaite | {Na}{Ca2}{Fe2+3Fe3+2}(Al3Si5O22)(OH)2 |
9.DE.15 | Potassic-sadanagaite | {K}{Ca2}{Mg3Al2}(Al3Si5O22)(OH)2 |
9.DE.15 | Potassic-pargasite | KCa2(Mg4Al)(Si6Al2)O22(OH)2 |
9.DE.15 | Potassic-ferro-sadanagaite | {K}{Ca2}{Fe2+3Al2}(Al3Si5O22)(OH)2 |
9.DE.15 | Magnesio-fluoro-hastingsite | NaCa2(Mg4Fe3+)(Si6Al2)O22F2 |
9.DE.15 | Ferro-chloro-pargasite | NaCa2(Fe2+4Al)(Al2Si6O22)Cl2 |
9.DE.15 | Potassic-fluoro-hastingsite | KCa2(Fe2+4Fe3+)(Si6Al2)O22F2 |
9.DE.15 | Potassic-chloro-hastingsite | KCa2(Fe2+4Fe3+)(Si6Al2)O22Cl2 |
9.DE.15 | Fluoro-pargasite | NaCa2(Mg4Al)(Si6Al2)O22F2 |
9.DE.15 | Parvo-mangano-edenite | {Na}{CaMn2+}{Mg5}(AlSi7O22)(OH)2 |
9.DE.15 | Fluoro-hastingsite | NaCa2(Fe2+4Fe3+)(Al2Si6O22)F2 |
9.DE.15 | Potassic-chloro-pargasite | KCa2(Mg4Al)(Si6Al2)O22Cl2 |
9.DE.15 | Ferro-fluoro-pargasite | (Na)(Ca2)(Fe2+4Al)(Al2Si6O22)F2 |
9.DE.15 | Potassic-ferro-chloro-edenite | KCa2Fe2+5(AlSi7O22)Cl2 |
9.DE.15 | Potassic-magnesio-hastingsite | KCa2(Mg4Fe3+)(Si6Al2)O22(OH)2 |
9.DE.15 | Potassic-ferro-pargasite | KCa2(Fe2+4Al)(Si6Al2)O22(OH)2 |
9.DE.15 | Potassic-hastingsite | KCa2(Fe2+4Fe3+)(Al2Si6O22)(OH)2 |
9.DE.15 | Chromio-pargasite | NaCa2(Mg4Cr)(Si6Al2)O22(OH)2 |
9.DE.15 | Potassic-fluoro-pargasite | KCa2(Mg4Al)(Si6Al2)O22F2 |
9.DE.15 | Ferri-kaersutite | NaCa2(Mg3Fe3+Ti)(Si6Al2O22)O2 |
9.DE.15 | Ferro-fluoro-edenite | NaCa2Fe2+5(AlSi7O22)F2 |
9.DE.15 | Ferri-sadanagaite | {Na}{Ca2}{Mg3Fe3+2}(Al3Si5O22)(OH)2 |
9.DE.15 | Ferro-sadanagaite | {Na}{Ca2}{Fe3Al2}(Al3Si5O22)(OH)2 |
9.DE.15 | Ferri-fluoro-sadanagaite | {Na}{Ca2}{Mg3Fe3+2}(Al3Si5O22)F2 |
9.DE.15 | Ferro-ferri-fluoro-sadanagaite | {Na}{Ca2}{Fe2+3Fe3+2}(Al3Si5O22)F2 |
9.DE.15 | Ferro-fluoro-sadanagaite | {Na}{Ca2}{Fe2+3Al2}(Al3Si5O22)F2 |
9.DE.15 | Fluoro-sadanagaite | {Na}{Ca2}{Mg3Al2}(Al3Si5O22)F2 |
9.DE.15 | Potassic-chloro-sadanagaite | {K}{Ca2}{Mg3Al2}(Al3Si5O22)Cl2 |
9.DE.15 | Potassic-ferro-chloro-sadanagaite | {K}{Ca2}{Fe2+3Al2}(Al3Si5O22)Cl2 |
9.DE.15 | Oxo-magnesio-hastingsite | NaCa2(Mg3(Fe3+2-x,Tix))5(Si6Al2O22)O2 |
9.DE.15 | Unnamed (F-dominant analogue of Ferri-kaersutite) | (Na,K)Ca2[Mg3(Fe3+,Fe2+)Ti](Si6Al2O22)(F,O)2 |
9.DE.15 | Vanadio-pargasite | NaCa2(Mg3+4V)(Al2Si6)O22(OH)2 |
9.DE.15 | Mangani-pargasite | NaCa2(Mg4Mn3+)(Si6Al2)O22(OH)2 |
9.DE.20 | Potassic-ferro-ferri-katophorite | {K}{CaNa}{Fe2+4Fe3+}[(AlSi7)O22](OH)2 |
9.DE.20 | Ferro-taramite | Na(CaNa)(Fe2+3Al2)(Al2Si6O22)(OH)2 |
9.DE.20 | Barroisite | â»{CaNa}{Mg3Al2}(AlSi7O22)(OH)2 |
9.DE.20 | Ferro-ferri-barroisite | â»(CaNa)(Fe2+3Fe3+2)(AlSi7O22)(OH)2 |
9.DE.20 | Ferro-ferri-winchite | â»[CaNa][Fe2+4(Fe3+,Al)]Si8O22(OH)2 |
9.DE.20 | Ferri-barroisite | â»(CaNa)(Mg3Fe3+2)(AlSi7O22)(OH)2 |
9.DE.20 | Ferro-ferri-taramite | Na(CaNa)(Fe2+3Fe3+2)(Al2Si6O22)(OH)2 |
9.DE.20 | Ferro-ferri-katophorite | Na(NaCa)(Fe2+4Fe3+)(Si7Al)O22(OH)2 |
9.DE.20 | Ferro-barroisite | â»{CaNa}{Fe2+3Al2}(AlSi7O22)(OH)2 |
9.DE.20 | Ferro-richterite | {Na}{CaNa}{Fe2+5}(Si8O22)(OH)2 |
9.DE.20 | Ferro-winchite | â»{CaNa}{Fe2+4Al}(Si8O22)(OH)2 |
9.DE.20 | Ferro-katophorite | {Na}{CaNa}{Fe2+4Al}[(AlSi7)O22](OH)2 |
9.DE.20 | Ferri-katophorite | Na(CaNa)(Mg4Fe3+)(AlSi7O22)(OH)2 |
9.DE.20 | Ferri-taramite | Na(CaNa)(Mg3Fe3+2)(Al2Si6O22)(OH)2 |
9.DE.20 | Magnesiotaramite | {Na}{CaNa}{Mg3AlFe3+}(Al2Si6O22)(OH)2 |
9.DE.20 | Richterite | Na(NaCa)Mg5(Si8O22)(OH)2 |
9.DE.20 | Winchite | â»{CaNa}{Mg4Al}(Si8O22)(OH)2 |
9.DE.20 | Taramite | Na(CaNa)(Mg3Al2)(Al2Si6O22)(OH)2 |
9.DE.20 | Fluoro-richterite | {Na}{CaNa}{Mg5}(Si8O22)(F,OH)2 |
9.DE.20 | Katophorite | {Na}{CaNa}{Mg4Al}[(AlSi7)O22](OH)2 |
9.DE.20 | Potassic-fluoro-richterite | {K}{CaNa}{Mg5}(Si8O22)(F,OH)2 |
9.DE.20 | Potassic-richterite | {K}{CaNa}{Mg5}Si8O22(OH)2 |
9.DE.20 | Potassic-fluoro-katophorite | K(CaNa)(Mg4Al)(AlSi7O22)F2 |
9.DE.20 | Ferro-fluoro-katophorite | Na(CaNa)(Fe2+4Al)(AlSi7O22)F2 |
9.DE.20 | Ferro-ferri-fluoro-katophorite | Na(CaNa)(Fe2+4Fe3+)(AlSi7O22)F2 |
9.DE.20 | Ferri-ghoseite | â»[Mn2+Na][Mg4Fe3+]Si8O22(OH)2 |
9.DE.20 | Ferri-winchite | â»(NaCa)(Mg4Fe3+)Si8O22(OH)2 |
9.DE.20 | Fluoro-taramite | {Na}{CaNa}{Mg3Al2}(Al2Si6O22)F2 |
9.DE.20 | Ferro-fluoro-richterite | {Na}{CaNa}{Fe2+5}(Si8O22)F2 |
9.DE.20 | Fluoro-katophorite | Na(CaNa)(Mg4Al)(AlSi7O22)F2 |
9.DE.20 | Potassic-ferri-katophorite | K(CaNa)(Mg4Fe3+)(AlSi7O22)(OH)2 |
9.DE.20 | Potassic-ferro-richterite | {K}{CaNa}{Fe2+5}Si8O22(OH)2 |
9.DE.20 | Ferri-fluoro-katophorite | Na(CaNa)(Mg4Fe3+)(AlSi7O22)F2 |
9.DE.20 | Potassic-ferro-taramite | K{CaNa}{Fe2+3Al2}{Si6Al2}O22(OH)2 |
9.DE.20 | Fluoro-winchite | â»{CaNa}{Mg4Al}(Si8O22)F2 |
9.DE.20 | Ferro-fluoro-winchite | â»{CaNa}{Fe2+4Al}(Si8O22)F2 |
9.DE.20 | Ferri-fluoro-barroisite | â»{CaNa}{Mg3Fe3+2}(AlSi7O22)F2 |
9.DE.20 | Ferro-fluoro-barroisite | â»{CaNa}{Fe2+3Al2}(AlSi7O22)F2 |
9.DE.20 | Ferro-ferri-fluoro-barroisite | â»{CaNa}{Fe2+3Fe3+2}(AlSi7O22)F2 |
9.DE.20 | Fluoro-barroisite | â»{CaNa}{Mg3Al2}(AlSi7O22)F2 |
9.DE.20 | Ferri-fluoro-taramite | Na(CaNa)(Mg3Fe3+2)(Al2Si6O22)F2 |
9.DE.20 | Ferro-ferri-fluoro-taramite | Na(CaNa)(Fe2+3Fe3+2)(Al2Si6O22)F2 |
9.DE.20 | Ferro-fluoro-taramite | Na(CaNa)(Fe2+3Al2)(Al2Si6O22)F2 |
9.DE.20 | Potassic-ferri-taramite | K(CaNa)(Mg3Fe3+2)(Al2Si6O22)(OH) |
9.DE.20 | Ghoseite | â»[Mn2+Na][Mg4Al]Si8O22(OH)2 |
9.DE.20 | Potassic-ferro-ferri-taramite | K(CaNa)(Fe2+3Fe3+2)(Al2Si6O22)(OH)2 |
9.DE.20 | Clinoferroholmquistite | â»Li2[Fe2+3Al2]Si8O22(OH,F)2 |
9.DE.20 | Hjalmarite | {Na}(NaMn}{Mg5}Si8O22(OH)2 |
9.DE.25 | Arfvedsonite | [Na][Na2][Fe2+4Fe3+]Si8O22(OH)2 |
9.DE.25 | Eckermannite | NaNa2(Mg4Al}Si8O22(OH)2 |
9.DE.25 | Ferro-eckermannite | NaNa2(Fe2+4Al)Si8O22(OH)2 |
9.DE.25 | Ferro-glaucophane | â»[Na2][Fe2+3Al2]Si8O22(OH)2 |
9.DE.25 | Glaucophane | â»[Na2][Mg3Al2]Si8O22(OH)2 |
9.DE.25 | Potassic-mangani-leakeite | [(Na,K)][Na2][Mg2Mn3+2Li]Si8O22(OH)2 |
9.DE.25 | Mangano-ferri-eckermannite | {Na}{Na2}{Mn2+4Fe3+}Si8O22(OH)2 |
9.DE.25 | Ferri-leakeite | [Na][Na2][Mg2Fe3+2Li]Si8O22(OH)2 |
9.DE.25 | Magnesio-riebeckite | â»{Na2}{Mg3Fe3+2}(Si8O22)(OH)2 |
9.DE.25 | Magnesio-arfvedsonite | {Na}{Na2}{Mg4Fe3+}(Si8O22)(OH)2 |
9.DE.25 | NybĂžite | NaNa2(Mg3Al2)(AlSi7O22)(OH)2 |
9.DE.25 | Riebeckite | â»[Na2][Fe2+3Fe3+2]Si8O22(OH)2 |
9.DE.25 | Mangano-mangani-ungarettiite | NaNa2(Mn2+2Mn3+3)(Si8O22)O2 |
9.DE.25 | Ferro-ferri-nybĂžite | NaNa2[(Fe2+3,Mg)Fe3+2](AlSi7O22)(OH)2 |
9.DE.25 | Clino-ferro-ferri-holmquistite | â»{Li2}{Fe2+3Fe3+2}(Si8O22)(OH)2 |
9.DE.25 | Ferri-nybĂžite | NaNa2(Mg3Fe3+2](AlSi7O22)(OH)2 |
9.DE.25 | Ferro-ferri-leakeite | [Na][Na2][Fe2+2Fe3+2Li]Si8O22(OH)2 |
9.DE.25 | Ferro-ferri-fluoro-leakeite | Na(Na2)(Fe2+2Fe3+2Li)(Si8O22)(F)2 |
9.DE.25 | Sodic-ferri-clinoferroholmquistite | Na0.5{Li2}{Fe2+3Fe3+2}(Si8O22)(OH)2 |
9.DE.25 | Magnesio-fluoro-arfvedsonite | [Na][Na2][Mg4Fe3+][Si8O22](F,OH)2 |
9.DE.25 | Ferri-pedrizite | [Na][Li2][Mg2Fe3+2Li]Si8O22(OH)2 |
9.DE.25 | Potassic-ferri-leakeite | [K][Na2][Mg2Fe3+2Li]Si8O22(OH)2 |
9.DE.25 | Fluoro-nybĂžite | NaNa2(Mg3Al2)(AlSi7O22)(F,OH)2 |
9.DE.25 | Mangano-ferri-fluoro-leakeite | NaNa2(Mn2+2Fe3+2Li)[Si8O22]F2 |
9.DE.25 | Clino-fluoro-holmquistite | â»{Li2}{Mg3Al2}(Si8O22)F2 |
9.DE.25 | Mangani-dellaventuraite | NaNa2(MgMn3+2Ti4+Li)Si8O22O2 |
9.DE.25 | Fluoro-pedrizite | NaLi2(Mg2Al2Li)(Si8O22)F2 |
9.DE.25 | Potassic-arfvedsonite | [(K,Na)][Na2][Fe2+4Fe3+]Si8O22(OH)2 |
9.DE.25 | Mangani-obertiite | NaNa2(Mg3Mn3+Ti4+)Si8O22O2 |
9.DE.25 | Ferro-nybĂžite | NaNa2(Fe2+3Al2)(AlSi7)O22(OH)2 |
9.DE.25 | Clino-sodic-fluoro-holmquistite | {Na}{Li2}{Mg4Al}(Si8O22)F2 |
9.DE.25 | Potassic-magnesio-fluoro-arfvedsonite | [(K,Na)][Na2][Mg4Fe3+][Si8O22][(F,OH)2] |
9.DE.25 | Ferro-ferri-pedrizite | [Na][Li2][Fe2+2Fe3+2Li]Si8O22(OH)2 |
9.DE.25 | Potassic-magnesio-arfvedsonite | [K][Na2][Mg4Fe3+]Si8O22(OH)2 |
9.DE.25 | Ferro-fluoro-glaucophane | â»[Na2][Fe2+3Al2]Si8O22F2 |
9.DE.25 | Pedrizite | NaLi2(LiMg2Al2)(Si8O22)(OH)2 |
9.DE.25 | Ferro-pedrizite | NaLi2(Fe2+2Al2Li)Si8O22(OH)2 |
9.DE.25 | Ferro-fluoro-pedrizite | Na(Li2)(Fe2+2Al2Li)[Si8O22]F2 |
9.DE.25 | Fluoro-leakeite | NaNa2(Mg2Al2Li)(Si8O22)F2 |
9.DE.25 | Ferro-ferri-obertiite | NaNa2(Fe2+3Fe3+Ti)Si8O22O2 |
9.DE.25 | Fluoro-glaucophane | â»[Na2][Mg3Al2]Si8O22F2 |
9.DE.25 | Fluoro-riebeckite | â»{Na2}{Fe2+3Fe3+2}(Si8O22)F2 |
9.DE.25 | Magnesio-fluoro-riebeckite | â»{Na2}{Mg3Fe3+2}(Si8O22)F2 |
9.DE.25 | Fluoro-eckermannite | NaNa2(Mg4Al}Si8O22F2 |
9.DE.25 | Ferro-fluoro-eckermannite | NaNa2(Fe2+4Al}Si8O22F2 |
9.DE.25 | Fluoro-arfvedsonite | [Na][Na2][Fe2+4Fe3+]Si8O22F2 |
9.DE.25 | Ferri-fluoro-nybĂžite | NaNa2(Mg3Fe3+2)(AlSi7O22)F2 |
9.DE.25 | Ferro-ferri-fluoro-nybĂžite | NaNa2(Fe2+3Fe3+2)(AlSi7O22)F2 |
9.DE.25 | Ferro-fluoro-nybĂžite | NaNa2(Fe2+3Al2)(AlSi7O22)F2 |
9.DE.25 | Ferro-leakeite | NaNa2(Fe2+2Al2Li)(Si8O22)(OH)2 |
9.DE.25 | Leakeite | NaNa2(Mg2Al2Li)(Si8O22)(OH)2 |
9.DE.25 | Potassic-leakeite | KNa2(Mg2Al2Li)(Si8O22)(OH)2 |
9.DE.25 | Ferri-fluoro-pedrizite | NaLi2(LiMg2Fe3+2)(Si8O22)F2 |
9.DE.25 | Ferro-ferri-fluoro-pedrizite | NaLi2(LiFe2+2Fe3+2)(Si8O22)F2 |
9.DE.25 | Clino-ferro-ferri-fluoro-holmquistite | â»{Li2}{Fe2+3Fe3+2}(Si8O22)F2 |
9.DE.25 | Clino-ferri-fluoro-holmquistite | â»{Li2}{Mg3Fe3+2}(Si8O22)F2 |
9.DE.25 | Clino-ferro-fluoro-holmquistite | â»{Li2}{Fe2+3Al2}(Si8O22)F2 |
9.DE.25 | Ferri-obertiite | NaNa2(Mg3Fe3+Ti)Si8O22O2 |
9.DE.25 | Oxo-mangani-leakeite | NaNa2(Mn3+4Li)Si8O22O2 |
9.DE.25 | Oxo-pargasite | NaCa2(Mg3(Al2-x,Tix))5(Si6Al2O22)O2 |
9.DE.25 | Unnamed (Possible K-analogue of Ferri-obertiite) | KNa2((Mg,Fe,Na)3Fe3+(Ti,Fe))Si8O22(O,F)2 |
9.DE.25 | Potassic-mangano-mangani-ungarettiite | KNa2(Mn2+2Mn3+3)Si8O22O2 |
9.DE.25 | Potassic-jeanlouisite | K(NaCa)(Mg4Ti)Si8O22O2 |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Tschermakite
mindat.org URL:
https://www.mindat.org/min-4035.html
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References for Tschermakite
Reference List:
Hawthorne, F. C., Oberti, R. (2006) On the classification of amphiboles. The Canadian Mineralogist, 44 (1) 1-21 doi:10.2113/gscanmin.44.1.1
Ishida, K. (2006) Assignment of infrared OH-stretching bands in calcic amphiboles through deuteration and heat treatment. American Mineralogist, 91 (5) 871-879 doi:10.2138/am.2006.1774
Localities for Tschermakite
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
â - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Australia | |
| Sutherland et al. (2003) |
| Geological Society of Australia WA Div. |
| Roche (2016) |
Bangladesh | |
| Rahman et al. (2022) |
Brazil | |
| Mesquita et al. (2017) |
| Campos et al. (2022) |
| Jour. of South American Earth Sci. ... |
| Souza Neto et al. (2008) |
| Massuda et al. (2020) |
Canada | |
| Samson I M et al. (1999) |
| Pe-Piper et al. (2024) |
| www.venuewest.com/8IKC/s1post.htm. |
| Charles A. Tarnocai et al. (1997) +1 other reference |
China | |
| Franz et al. (2001) |
| C. Lemanski (re-entry of lost Mindat data) |
| Porter (2016) |
| Zheng et al. (2015) |
| Dongyang Zhang et al. (2010) |
| Li et al. (2022) |
| Bai et al. (2018) |
| Weidong Hui et al. (2011) |
| Wang et al. (2022) |
Czech Republic | |
| MĂŒcke et al. (2002) |
| MĂŒcke et al. (2002) |
MĂŒcke et al. (2002) | |
MĂŒcke et al. (2002) | |
MĂŒcke et al. (2002) | |
ZimĂĄk et al. (2018) | |
| CĂlek et al. (zĂĄpadoÄeskĂ© svrchnĂ proterozoikum) |
Finland | |
| SipilÀ |
| Papunen |
| Laitakari (1916) |
France | |
| F. André and J. Béhien |
| T. Sameshima et al. |
| Bull. Soc. Franç. Minéralo. ... |
| Arliguie M collection |
Germany | |
| WeiĂ (1990) |
Greece | |
| Eur. J. Mineral. |
Greenland | |
| Petersen et al. (1993) |
Hungary | |
| Harangi |
| SzakĂĄll-Gatter-Szendrei |
| Mineral Species of Hungary |
| SzakĂĄll-Gatter-Szendrei |
India | |
| Narayanan Kutty et al. (1977) |
| Chowdhury (2007) +1 other reference |
| Rout et al. (2022) |
Indonesia | |
Knuever et al. (2023) | |
Iran | |
| Kamali et al. (2018) +1 other reference |
Italy | |
| Russo et al. (2004) |
| Knuever et al. (2023) |
| Gamboni et al. (2006) |
Madagascar | |
| Frank K. Mazdab collection |
| Andrianjakavah et al. +1 other reference |
Mexico | |
| American Mineralogist |
New Zealand | |
| Mossman et al. (2000) |
Mossman et al. (2000) | |
Norway | |
| Brickwood (1986) |
| Birkeland et al. (1993) |
| Smith (1988) |
Oman | |
| The Meteoritical Bulletin et al. (2004) |
Pakistan | |
| Rolfo et al. (1997) |
imported from Rondu District +1 other reference | |
| DH&Z +1 other reference |
Philippines | |
| Cao et al. (2018) |
Poland | |
| Oberc-Dziedzic et al. (2011) |
Romania | |
| Delia Cristina Papp et al. (2005) |
Russia | |
| Kiseleva et al. (2022) |
| Sorokina et al. (2019) |
| Barkov et al. (2019) |
| Novakov et al. (2021) |
Tararin et al. (2007) | |
Tararin et al. (2007) | |
| Nikolay Serebryakov data |
| A. Yu. Barkov et al. |
| Pavel.M. Kartashov (n.d.) |
| Trunilina et al. (2024) |
Slovakia | |
| [[1]]Reato |
| OzdĂn D. |
| SpiĆĄĂĄk |
| ÄuÄa |
South Korea | |
| Lee et al. (2022) |
Spain | |
| Majarena Serrano (2015) |
| Martin-Izard et al. (1995) |
Switzerland | |
| Stalder et al. (1998) |
| Stalder et al. (1998) |
Tanzania | |
| Cedric Simonet (2000) |
UK | |
Tindle (2008) | |
| Ferry (1996) |
| Smellie et al. (1984) |
www.minsocam.org | |
| Bevins et al. (1993) |
USA | |
| Geological Society of America Bulletin |
| Anthony et al. (1995) |
| Mertzman (1978) +1 other reference |
| American Mineralogist |
| American Mineralogist |
| Stapor |
Stapor | |
| Lang |
| McSween et al. (1984) |
| Anderson et al. (2009) |
| Nathan Clay Collins (2011) |
| Nathan Clay Collins (2011) |
| EL-Shazley et al. (2011) |
Collins (2011) | |
| McSween Jr et al. (1984) |
| Page et al. (2004) |
Page et al. (2004) | |
| McSween et al. (1984) |
Stapor | |
| in the collection of Jennifer Cindrich |
Vietnam | |
| Xu et al. (2024) |
Zimbabwe | |
| Chaumba (2017) |
The Moon | |
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Varatskoe occurrence, Loukhsky District, Republic of Karelia, Russia