Magnesiocarpholite
A valid IMA mineral species
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About Magnesiocarpholite
Formula:
MgAl2Si2O6(OH)4
Colour:
Light green to grayish
Hardness:
5 - 5½
Specific Gravity:
2.88 (Calculated)
Crystal System:
Orthorhombic
Member of:
Name:
Named for being magnesium dominant carpholite.
Type Locality:
Unique Identifiers
Mindat ID:
2500
Long-form identifier:
mindat:1:1:2500:9
GUID
(UUID V4):
(UUID V4):
3ec9c8b9-9b77-4579-b5c5-e81de67dae01
IMA Classification of Magnesiocarpholite
Approved
First published:
1973
Classification of Magnesiocarpholite
9.DB.05
9 : SILICATES (Germanates)
D : Inosilicates
B : Inosilicates with 2-periodic single chains, Si2O6; Pyroxene-related minerals
9 : SILICATES (Germanates)
D : Inosilicates
B : Inosilicates with 2-periodic single chains, Si2O6; Pyroxene-related minerals
65.1.5.3
65 : INOSILICATES Single-Width,Unbranched Chains,(W=1)
1 : Single-Width Unbranched Chains, W=1 with chains P=2
65 : INOSILICATES Single-Width,Unbranched Chains,(W=1)
1 : Single-Width Unbranched Chains, W=1 with chains P=2
16.19.12
16 : Silicates Containing Aluminum and other Metals
19 : Aluminosilicates of Fe and Mg
16 : Silicates Containing Aluminum and other Metals
19 : Aluminosilicates of Fe and Mg
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 |
|---|---|---|
| Mcar | IMAâCNMNC | Warr, L.N. (2021). IMAâCNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Mcar | 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 |
Physical Properties of Magnesiocarpholite
Transparency:
Transparent
Colour:
Light green to grayish
Hardness:
5 - 5½ on Mohs scale
Density:
2.88(4) g/cm3 (Calculated)
Optical Data of Magnesiocarpholite
Type:
Biaxial (-)
RI values:
nα = 1.590 nβ = 1.600 nγ = 1.610
2V:
Measured: 50° to 60°, Calculated: 88°
Max Birefringence:
δ = 0.020
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 distinct
Chemistry of Magnesiocarpholite
Mindat Formula:
MgAl2Si2O6(OH)4
Common Impurities:
Ti,Fe,Mn,Ca,Na,K,H2O,P
Crystallography of Magnesiocarpholite
Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Ccca
Setting:
Ccca
Cell Parameters:
a = 13.714(2) Å, b = 20.079(2) Å, c = 5.105(1) Å
Ratio:
a:b:c = 0.683 : 1 : 0.254
Unit Cell V:
1,405.73 Ă
Âł (Calculated from Unit Cell)
Z:
8
Morphology:
small acicular to fibrous crystals
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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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) |
|---|---|---|---|---|---|---|---|
| 0000849 | Magnesiocarpholite | Viswanathan K (1981) The crystal structure of a Mg-rich carpholite American Mineralogist 66 1080-1085 |  | 1981 | southeast Sfinari, West Crete | 0 | 293 |
| 0006870 | Magnesiocarpholite | Fuchs Y, Mellini M, Memmi I (2001) Crystal-chemistry of magnesiocarpholite: controversial X-ray diffraction, Mossbauer, FTIR and Raman results European Journal of Mineralogy 13 533-543 | 2001 | Monte Argentario | 0 | 293 | |
| 0006871 | Magnesiocarpholite | Fuchs Y, Mellini M, Memmi I (2001) Crystal-chemistry of magnesiocarpholite: controversial X-ray diffraction, Mossbauer, FTIR and Raman results European Journal of Mineralogy 13 533-543 | 2001 | Monte Leoni | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 5.66 Ă | (100) |
| 5.02 Ă | (45) |
| 2.59 Ă | (45) |
| 3.42 Ă | (25) |
| 2.99 Ă | (25) |
| 2.73 Ă | (18) |
| 1.89 Ă | (15) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 5: Initiation of plate tectonics | <3.5-2.5 |
| 40 : Regional metamorphism (greenschist, amphibolite, granulite facies) |
Type Occurrence of Magnesiocarpholite
Geological Setting of Type Material:
high-pressure, low-temperature metamorphism
Associated Minerals at Type Locality:
Reference:
Goffé, B., Goffé-Urbano, G., Saliot, P. (1973) Sur la présence d'une variété magnésienne de ferrocarpholite en Vanoise (Alpes françaises). Comptes Rendus de l'Académie des Sciences de Paris, 277, 1965-1968.
Synonyms of Magnesiocarpholite
Other Language Names for Magnesiocarpholite
Relationship of Magnesiocarpholite to other Species
Member of:
Other Members of this group:
| Carpholite | Mn2+Al2(Si2O6)(OH)4 | Orth. mmm (2/m 2/m 2/m) : Ccca |
| Ferrocarpholite | Fe2+Al2Si2O6(OH)4 | Orth. mmm (2/m 2/m 2/m) : Ccca |
| Potassiccarpholite | K(Mn2+,Li)2Al4Si4O12(OH,F)8 | Orth. mmm (2/m 2/m 2/m) : Ccca |
| Vanadiocarpholite | Mn2+V3+Al(Si2O6)(OH)4 | Orth. mmm (2/m 2/m 2/m) : Ccca |
Forms a series with:
Related Minerals - Strunz-mindat Grouping
| 9.DB.05 | Balipholite | BaLiMg2Al3(Si2O6)2(OH)4 |
| 9.DB.05 | Carpholite | Mn2+Al2(Si2O6)(OH)4 |
| 9.DB.05 | Ferrocarpholite | Fe2+Al2Si2O6(OH)4 |
| 9.DB.05 | Potassiccarpholite | K(Mn2+,Li)2Al4Si4O12(OH,F)8 |
| 9.DB.05 | Vanadiocarpholite | Mn2+V3+Al(Si2O6)(OH)4 |
| 9.DB.10 | Lorenzenite | Na2Ti2(Si2O6)O3 |
| 9.DB.15 | Lintisite | LiNa3Ti2(Si2O6)2O2 · 2H2O |
| 9.DB.15 | Punkaruaivite | LiTi2(HSi4O12)(OH)2 · H2O |
| 9.DB.17 | Eliseevite | LiNa1.5Ti2(H1.5Si4O12)O2 · 2H2O |
| 9.DB.20 | Kukisvumite | Na6ZnTi4(Si8O24)O4 · 4H2O |
| 9.DB.20 | Manganokukisvumite | Na6MnTi4(Si8O24)O4 · 4H2O |
| 9.DB.25 | Vinogradovite | Na4Ti4(Si2O6)2[(Si,Al)4O10]O4 · (H2O,Na,K)3 |
| 9.DB.25 | Paravinogradovite | Na1-2(Ti,Fe3+)4(Si2O6)2(AlSi3O10)(OH)4 · H2O |
| 9.DB.30 | Nchwaningite | Mn2+2(SiO3)(OH)2 · H2O |
| 9.DB.35 | Plancheite | Cu8(Si8O22)(OH)4 · H2O |
| 9.DB.40 | Shattuckite | Cu5(Si2O6)2(OH)2 |
| 9.DB.40 | UM2005-31-SiO:CuH | Cu11(SiO4)(OH)18 · 9H2O (?) |
| 9.DB.45 | Aerinite | (Ca5.1Na0.5)(Fe3+,Al,Fe2+,Mg)4(Al,Mg)6[HSi12O36(OH)12][(CO3)1.2(H2O)12] |
| 9.DB.50 | Capranicaite | KCaNaAl4B4Si2O18 |
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 Magnesiocarpholite
mindat.org URL:
https://www.mindat.org/min-2500.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Magnesiocarpholite
Reference List:
Localities for Magnesiocarpholite
symbol to view information about a locality.
The 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).
All localities listed without proper references should be considered as questionable.
Australia | |
| Hassan (2017) |
France (TL) | |
| Goffé et al. (1973) +1 other reference |
| Goffé (2023) |
Germany | |
| Lapis 15 (7/8) |
Greece | |
| Theye et al. (1992) |
| Viswanathan et al. (1979) | |
| Theye et al. (1992) |
| Viswanathan et al. (1979) |
| Theye et al. (1992) |
| Theye et al. (1992) | |
Italy | |
| Marchesini (1994) +1 other reference |
| Bracco (2003) |
| Piccoli et al. (2007) |
| Piccoli (2002) |
| Piccoli et al. (2007) |
| Rossetti P. (2008) |
| Goffé (2002) +1 other reference |
| Goffé (2002) +1 other reference | |
| Eur. J. Mineral. +3 other references |
| Theye T. et al. (1997) +2 other references | |
| Theye T. et al. (1997) +2 other references | |
| Giorgetti G. et al. (1998) +1 other reference | |
Oman | |
| e-rocks.com (n.d.) |
Spain | |
| Goffé +3 other references |
| Eur. J. Mineral. |
| Goffé +3 other references |
| J.M. Azanon and B. Goffé | |
Switzerland | |
| Stalder et al. (1998) |
USA | |
| Nikischer (2019) |
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Osiglia, Savona Province, Liguria, Italy