Trabzonite
A valid IMA mineral species
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Formula:
Ca4(Si3O9)(OH)2
Colour:
Colourless
Lustre:
Vitreous
Specific Gravity:
2.9
Crystal System:
Orthorhombic
Name:
Named after the province of Trabzon, Turkey, that includes the type locality of Ikizdere, northwest of Varda Yaylasi.
Type Locality:
Dimorph of:
Unique Identifiers
Mindat ID:
4005
Long-form identifier:
mindat:1:1:4005:7
GUID
(UUID V4):
(UUID V4):
d4e9d028-0bbd-4607-9f50-e7772c9666d6
IMA Classification of Trabzonite
Approved
IMA Formula:
Ca4[Si3O9(OH)](OH)
Approval year:
1983
First published:
1986
Classification of Trabzonite
9.BJ.15
9 : SILICATES (Germanates)
B : Sorosilicates
J : Sorosilicates with Si3O10, Si4O11, etc. anions; cations in octahedral [6] and greater coordination
9 : SILICATES (Germanates)
B : Sorosilicates
J : Sorosilicates with Si3O10, Si4O11, etc. anions; cations in octahedral [6] and greater coordination
57.1.3.1
57 : SOROSILICATES Si3O10 Groups and Larger Noncyclic Groups
1 : Insular Si3O10 and Larger Noncyclic Groups with [Si3O10] groups
57 : SOROSILICATES Si3O10 Groups and Larger Noncyclic Groups
1 : Insular Si3O10 and Larger Noncyclic Groups with [Si3O10] groups
14.5.20
14 : Silicates not Containing Aluminum
5 : Silicates of Ca
14 : Silicates not Containing Aluminum
5 : Silicates of Ca
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Symbol | Source | Reference |
---|---|---|
Trb | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Trb | 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 Trabzonite
Vitreous
Transparency:
Transparent
Colour:
Colourless
Streak:
White
Cleavage:
None Observed
Fracture:
Conchoidal
Density:
2.9 g/cm3 (Measured) 3.08 g/cm3 (Calculated)
Comment:
Measured by suspension
Optical Data of Trabzonite
Type:
Biaxial (+)
RI values:
nα = 1.632 nβ = 1.634 nγ = 1.640
2V:
Measured: 55° to 60°, Calculated: 62°
Max Birefringence:
δ = 0.008
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:
weak to distinct
Chemistry of Trabzonite
Mindat Formula:
Ca4(Si3O9)(OH)2
Elements listed:
Common Impurities:
Al,Mn,Mg,Na
Crystallography of Trabzonite
Crystal System:
Orthorhombic
Class (H-M):
mm2 - Pyramidal
Space Group:
Ama2
Cell Parameters:
a = 20.6 Å, b = 9.1 Å, c = 10.3 Å
β = 98°
β = 98°
Ratio:
a:b:c = 2.264 : 1 : 1.132
Unit Cell V:
1,930.84 ų (Calculated from Unit Cell)
Z:
8
Comment:
Originally assumed to be P21/m.
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) |
---|---|---|---|---|---|---|---|
0018996 | Trabzonite | Armbruster T, Lazic B, Galuskina I O, Galuskin E V, Gnos E, Marzec K M, Gazeev V M (2012) Trabzonite, Ca4[Si3O9(OH)]OH: crystal structure, revised formula, new occurrence and relation to killalaite Mineralogical Magazine 76 455-472 | 2012 | Ikizdere, Turkey | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
3.062 Å | (100) |
2.585 Å | (90) |
3.442 Å | (60) |
2.851 Å | (50) |
2.635 Å | (50) |
5.71 Å | (35) |
2.912 Å | (30) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
High-𝑇 alteration and/or metamorphism | |
31 : Thermally altered carbonate, phosphate, and iron formations |
Type Occurrence of Trabzonite
General Appearance of Type Material:
Irregular grains to 0.2 mm.
Place of Conservation of Type Material:
Natural History Museum, Geneva, Switzerland, 435/78.
Geological Setting of Type Material:
Retrograde skarn.
Associated Minerals at Type Locality:
Reference:
Sarp, H., Burri, G. (1986) Trabzonite Ca4Si3O10·2H2O a new hydrated calcium silicate. Schweizerische Mineralogische und Petrographische Mitteilungen: 66: 453-453.
Synonyms of Trabzonite
Other Language Names for Trabzonite
German:Trabzonit
Spanish:Trabzonita
Related Minerals - Strunz-mindat Grouping
9.BJ. | Arsenmedaite | Mn2+6 As5+Si5O18(OH) |
9.BJ.05 | Orientite | Ca8Mn3+10(SiO4)3(Si3O10)3(OH)10 · 4H2O |
9.BJ.10 | Rosenhahnite | HCa3[Si3O9(OH)] |
9.BJ.20 | Thalénite-(Y) | Y3Si3O10F |
9.BJ.25 | Tiragalloite | Mn2+4As5+Si3O12(OH) |
9.BJ.30 | Medaite | Mn2+6V5+Si5O18(OH) |
9.BJ.35 | Ruizite | Ca2Mn3+2[Si4O11(OH)2](OH)2 · 2H2O |
9.BJ.35 | Taniajacoite | SrCaMn3+2Si4O11(OH)4 · 2H2O |
9.BJ.35 | Strontioruizite | Sr2Mn3+2Si4O11(OH)4 · 2H2O |
9.BJ.40 | Ardennite-(As) | Mn2+4Al4(AlMg)(AsO4)(SiO4)2(Si3O10)(OH)6 |
9.BJ.40 | Ardennite-(V) | Mn2+4Al4(AlMg)(VO4)(SiO4)2(Si3O10)(OH)6 |
9.BJ.40 | Kannanite | Ca4Al4(AlMg)(VO4)(SiO4)2(Si3O10)(OH)6 |
9.BJ.40 | Alpeite | Ca4Mn3+2Al2(Mn3+Mg)(SiO4)2(Si3O10)(V5+O4)(OH)6 |
9.BJ.45 | Kilchoanite | Ca6(SiO4)(Si3O10) |
9.BJ.50 | Kornerupine | Mg3Al6(Si,Al,B)5O21(OH) |
9.BJ.50 | Prismatine | (◻,Fe,Mg)(Mg,Al,Fe)5Al4Si2(Si,Al)2(B,Si,Al)(O,OH,F)22 |
9.BJ.55 | Zunyite | Al13Si5O20(OH,F)18Cl |
9.BJ.60 | Hubeite | Ca2Mn2+Fe3+Si4O12(OH) · 2H2O |
9.BJ.65 | Cassagnaite | (Ca,Mn2+)4(Fe3+,Mn3+,Al)4(V3+,Mg,Al)2(Si3O10)(SiO4)2(OH,O)8 |
9.BJ.70 | Pavlovskyite | Ca8(SiO4)2(Si3O10) |
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 Trabzonite
mindat.org URL:
https://www.mindat.org/min-4005.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
References for Trabzonite
Reference List:
Jambor, John L., Ercit, Ernst A. J. Burke T. Scott, Grice, Joel D. (1988) New Mineral Names. American Mineralogist, 73 (11-12) 1492-1499
Armbruster, T., Lazic, B., Gfeller, F., Galuskin, E. V., Galuskina, I. O., Savelyeva, V. B., Zadov, A. E., Pertsev, N. N., Dzierżanowski, P. (2011) Chlorine content and crystal chemistry of dellaite from the Birkhin gabbro massif, Eastern Siberia, Russia. Mineralogical Magazine, 75 (2) 379-394 doi:10.1180/minmag.2011.075.2.379
Localities for Trabzonite
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - 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.
Russia | |
| Galuskin et al. (2012) |
Armbruster et al. (2012) | |
Galuskina et al. (2015) | |
Armbruster et al. (2012) | |
Armbruster et al. (2012) | |
Turkey (TL) | |
| Am Min 73:11-12 p 1497 +4 other references |
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