Carboirite
A valid IMA mineral species
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About Carboirite
Formula:
Fe2+Al2O(GeO4)(OH)2
Colour:
Green
Lustre:
Vitreous
Hardness:
6
Specific Gravity:
3.95 (Calculated)
Crystal System:
Triclinic
Member of:
Name:
Named after the type locality, Carboire, Ariège, Midi-Pyrénées, France.
Type Locality:
Unique Identifiers
Mindat ID:
893
Long-form identifier:
mindat:1:1:893:8
Similar Names
| Carboirite-III | Fe2+Al2GeO5(OH)2 |
IMA Classification of Carboirite
Approved
IMA Formula:
Fe2+Al2GeO5(OH)2
Approval year:
1980
First published:
1983
Type description reference:
Johan, Z.; Oudin, E.; Picot, P. (1983) Analogues germanifères et gallifères des silicates et oxydes dans les gisements de zinc des Pyrénées centrales, France; argutite et carboirite, deux nouvelles espèces minérales [Germanium and gallium analogs of silicates and oxides from zinc deposits of the French central Pyrenees; argutite and carboirite, two new mineral species]. TMPM Tschermaks Mineralogische und Petrographische Mitteilungen, 31 (1). 97-119 doi:10.1007/bf01084764
Classification of Carboirite
9.J0.05
9 : SILICATES (Germanates)
J : Germanates
0 :
9 : SILICATES (Germanates)
J : Germanates
0 :
52.3.3.4
52 : NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
3 : Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] coordination only
52 : NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
3 : Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] coordination only
7.11.17
7 : Oxides and Hydroxides
11 : Oxides of Sn and Pb
7 : Oxides and Hydroxides
11 : Oxides of Sn and Pb
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Cb | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Carboirite
Vitreous
Colour:
Green
Hardness:
6 on Mohs scale
Cleavage:
Distinct/Good
(001)
(001)
Density:
3.95 g/cm3 (Calculated)
Optical Data of Carboirite
Type:
Biaxial (+)
RI values:
nα = 1.731 nβ = 1.735 nγ = 1.74
2V:
Measured: 65° to 70°
Max. Birefringence:
δ = 0.009
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Moderate
Pleochroism:
Visible
Comments:
X = bluish green, Y = light blue, Z = colorless to yellow
Chemistry of Carboirite
Mindat Formula:
Fe2+Al2O(GeO4)(OH)2
Element Weights:
Crystallography of Carboirite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Cell Parameters:
a = 9.51 Å, b = 5.56 Å, c = 9.29 Å
α = 96.08°, β = 101.52°, γ = 89.45°
α = 96.08°, β = 101.52°, γ = 89.45°
Ratio:
a:b:c = 1.71 : 1 : 1.671
Unit Cell V:
478.58 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Pseudo-hexagonal plates. Forms {001}, {110}, {010}.
Twinning:
Polysynthetic twinning // to (001).
Comment:
Space group C1 as compared to monoclinic chloritoid
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.785 Å | (50) |
| 4.528 Å | (100) |
| 3.020 Å | (80) |
| 2.728 Å | (90) |
| 2.480 Å | (90) |
| 1.854 Å | (60) |
| 1.608 Å | (70) |
| 1.384 Å | (60) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-? alteration and/or metamorphism | |
| 33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) |
Type Occurrence of Carboirite
General Appearance of Type Material:
Green, pseudo-hexagonal plates (100 x 100 x 30 µm).
Place of Conservation of Type Material:
Ecole Nationale Supérieure des Mines, Paris, France, number 54469.
Associated Minerals at Type Locality:
Reference:
Johan, Z.; Oudin, E.; Picot, P. (1983) Analogues germanifères et gallifères des silicates et oxydes dans les gisements de zinc des Pyrénées centrales, France; argutite et carboirite, deux nouvelles espèces minérales [Germanium and gallium analogs of silicates and oxides from zinc deposits of the French central Pyrenees; argutite and carboirite, two new mineral species]. TMPM Tschermaks Mineralogische und Petrographische Mitteilungen, 31 (1). 97-119 doi:10.1007/bf01084764
Synonyms of Carboirite
Other Language Names for Carboirite
Relationship of Carboirite to other Species
Member of:
Other Members of Chloritoid Group:
| Chloritoid | Fe2+Al2O(SiO4)(OH)2 | Mon. 2/m : B2/b |
| Magnesiochloritoid | MgAl2O(SiO4)(OH)2 | Mon. 2/m : B2/b |
| Ottrélite | Mn2+Al2O(SiO4)(OH)2 | Mon. |
Forms a series with:
Common Associates
Associations Based on Photo Data:
| 2 photos of Carboirite associated with Sphalerite | ZnS |
Related Minerals - Strunz-mindat Grouping
| 9.J0.10 | Bartelkeite | Pb(Fe2+Ge)[Ge2O7](OH)2 · H2O |
| 9.J0.15 | Otjisumeite | PbGe4O9 |
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 Carboirite
mindat.org URL:
https://www.mindat.org/min-893.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
Mineral Dealers:
References for Carboirite
Reference List:
Johan, Z.; Oudin, E.; Picot, P. (1983) Analogues germanifères et gallifères des silicates et oxydes dans les gisements de zinc des Pyrénées centrales, France; argutite et carboirite, deux nouvelles espèces minérales [Germanium and gallium analogs of silicates and oxides from zinc deposits of the French central Pyrenees; argutite and carboirite, two new mineral species]. TMPM Tschermaks Mineralogische und Petrographische Mitteilungen, 31 (1). 97-119 doi:10.1007/bf01084764
Localities for Carboirite
Showing 2 localities.
symbol to view information about a locality.
The 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).
All localities listed without proper references should be considered as questionable.
France (TL) | |
| Johan et al. (1983) +2 other references |
| Cugerone (2019) |
Quick NavTopAbout CarboiriteUnique IdentifiersSimilar NamesIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesRelationshipsCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Carboire, Ustou, Saint-Girons, Ariège, Occitanie, France