Inderborite
A valid IMA mineral species - grandfathered
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About Inderborite
Formula:
CaMg(H3B3O7)2 · 8H2O
Colour:
Colourless to white
Lustre:
Vitreous
Hardness:
3½
Specific Gravity:
1.93 - 2.00
Crystal System:
Monoclinic
Member of:
Name:
After the type locality, INDER Lake, Kazakhstan, plus in allusion to its composition, being a BORate.
Unique Identifiers
Mindat ID:
2024
Long-form identifier:
mindat:1:1:2024:0
IMA Classification of Inderborite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
CaMg[B3O3(OH)5]2(H2O)4·2H2O
First published:
1941
Classification of Inderborite
6.CA.25
6 : BORATES
C : Triborates
A : Neso-triborates
6 : BORATES
C : Triborates
A : Neso-triborates
26.3.1.2
26 : HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
3 : Triborates
26 : HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
3 : Triborates
9.3.23
9 : Borates
3 : Borates of Ca and Sr
9 : Borates
3 : Borates of Ca and Sr
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 |
|---|---|---|
| Ibo | 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 Inderborite
Vitreous
Transparency:
Transparent
Colour:
Colourless to white
Streak:
White
Hardness:
3½ on Mohs scale
Cleavage:
Distinct/Good
On {100} good.
On {100} good.
Fracture:
Conchoidal
Density:
1.93 - 2.00 g/cm3 (Measured) 1.92 g/cm3 (Calculated)
Optical Data of Inderborite
Type:
Biaxial (-)
RI values:
nα = 1.482 - 1.496 nβ = 1.512 - 1.521 nγ = 1.530 - 1.54
2V:
Measured: 77° to 86°, Calculated: 74°
Max. Birefringence:
δ = 0.044 - 0.048
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
Dispersion:
none
Optical Extinction:
Z = b; X ∧ c = 2.5°.
Chemistry of Inderborite
Mindat Formula:
CaMg(H3B3O7)2 · 8H2O
Element Weights:
Crystallography of Inderborite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Setting:
C2/c
Cell Parameters:
a = 12.137(2) Å, b = 7.433(1) Å, c = 19.234(3) Å
β = 90.29°
β = 90.29°
Ratio:
a:b:c = 1.633 : 1 : 2.588
Unit Cell V:
1,735.16 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Crystals to 2 cm. Coarsely crystalline aggregates.
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) |
|---|---|---|---|---|---|---|---|
| 0005383 | Inderborite | Burns P C, Hawthorne F C (1994) Structure and hydrogen bonding in inderborite, a heteropolyhedral sheet structure The Canadian Mineralogist 32 533-539 |  | 1994 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.35 Å | (100) |
| 3.26 Å | (80) |
| 3.07 Å | (80) |
| 2.45 Å | (80) |
| 2.29 Å | (80) |
| 1.801 Å | (80) |
| 6.13 Å | (50) |
Comments:
Inder deposit, Kazakhstan.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 25 : Evaporites (prebiotic) |
Type Occurrence of Inderborite
General Appearance of Type Material:
Coarsely crystalline aggregates and well developed crystals up to 2 cm in size.
Place of Conservation of Type Material:
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 43443–43447.
Geological Setting of Type Material:
Borate deposit.
Associated Minerals at Type Locality:
Synonyms of Inderborite
Other Language Names for Inderborite
Relationship of Inderborite to other Species
Member of:
Other Members of Inderite Group:
| Inderite | MgB3O3(OH)5 · 5H2O | Mon. 2/m : P21/b |
| Inyoite | Ca(H4B3O7)(OH) · 4H2O | Mon. 2/m : P21/b |
| Kurnakovite | MgB3O3(OH)5 · 5H2O | Tric. 1 : P1 |
| Meyerhofferite | CaB3O3(OH)5 · H2O | Tric. 1 : P1 |
| Solongoite | Ca2(H3B3O7)(OH)Cl | Mon. 2/m : P21/b |
Common Associates
Related Minerals - Strunz-mindat Grouping
| 6.CA.10 | Ameghinite | Na(H4B3O7) |
| 6.CA.15 | Inderite | MgB3O3(OH)5 · 5H2O |
| 6.CA.20 | Kurnakovite | MgB3O3(OH)5 · 5H2O |
| 6.CA.30 | Meyerhofferite | CaB3O3(OH)5 · H2O |
| 6.CA.35 | Inyoite | Ca(H4B3O7)(OH) · 4H2O |
| 6.CA.40 | Solongoite | Ca2(H3B3O7)(OH)Cl |
| 6.CA.45 | Peprossiite-(Ce) | CeAl2(B3.67Si0.33)O10.67 |
| 6.CA.45 | Peprossiite-(Y) | YAl2(B3.67Si0.33)O10.67 |
| 6.CA.50 | Nifontovite | Ca3B6O6(OH)12(H2O)2 |
| 6.CA.55 | Olshanskyite | Ca2[B3O3(OH)6](OH) · 3H2O |
Other Information
IR Spectrum:
Inder material [cm-1]: 3655, 3550, 3495, 3420s, 3355s, 3240sh, 3100sh, 1650, 1462, 1423s, 1344, 1294w, 1220sh, 1203, 1100sh, 1064s, 1020sh, 961s, 867s, 814w, 759, 729, 643w, 600w, 530, 445, 410sh
Thermal Behaviour:
A small piece cracks in the flame of a blowtorch and melts, forming colourless glass and imparting a light-green colour to the flame. Heated in a closed tube, it splits and produces water.
Notes:
Slowly soluble in cold water. Rapidly soluble in hot HCl.
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 Inderborite
mindat.org URL:
https://www.mindat.org/min-2024.html
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Please feel free to link to this page.
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References for Inderborite
Reference List:
Burns, P. C., Hawthorne, F. C. (1994) Structure and hydrogen bonding in inderborite, a heteropolyhedral sheet structure. The Canadian Mineralogist, 32 (3) 533-539
Localities for Inderborite
Showing 5 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.
Argentina | |
| Galliski et al. (2010) |
Canada | |
| Shang (2000) |
Kazakhstan | |
| Clark (1993) +1 other reference |
| Gorshkov (1941) +1 other reference |
Turkey | |
| Baysal (1972) +3 other references |
Quick NavTopAbout InderboriteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesRelationshipsCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Inder B deposit and salt dome, Inder District, Atyrau Region, Kazakhstan