Clinokurchatovite
A valid IMA mineral species
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About Clinokurchatovite
Formula:
Ca(Mg,Fe2+,Mn2+)[B2O5]
Colour:
light grey
Hardness:
4½
Specific Gravity:
3.07 - 3.08
Crystal System:
Monoclinic
Name:
In allusion to its crystallographic structure, crystallizing in the monoclinic system, and after Igor Vasil’evich Kurchatov (1903–1960), Russian physicist, Institute of Nuclear Energy, Moscow, Russia, and its relationship to Kurchatovite.
This page provides mineralogical data about Clinokurchatovite.
Unique Identifiers
Mindat ID:
1079
Long-form identifier:
mindat:1:1:1079:1
IMA Classification of Clinokurchatovite
Approved
IMA Formula:
CaMgB2O5
Classification of Clinokurchatovite
6.BA.10
6 : BORATES
B : Diborates
A : Neso-diborates with double triangles B2(O,OH)5; 2(2D); 2(2D) + OH, etc.
6 : BORATES
B : Diborates
A : Neso-diborates with double triangles B2(O,OH)5; 2(2D); 2(2D) + OH, etc.
24.4.3.1
24 : ANHYDROUS BORATES
4 : A2[X2O5]
24 : ANHYDROUS BORATES
4 : A2[X2O5]
9.7.7
9 : Borates
7 : Borates of Mn
9 : Borates
7 : Borates of Mn
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 |
|---|---|---|
| Ckht | 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 Clinokurchatovite
Transparency:
Translucent
Colour:
Light grey
Hardness:
4½ on Mohs scale
Cleavage:
Perfect
Density:
3.07 - 3.08 g/cm3 (Measured) 3.10 g/cm3 (Calculated)
Optical Data of Clinokurchatovite
Type:
Biaxial (-)
RI values:
nα = 1.642 - 1.644 nβ = 1.674 - 1.675 nγ = 1.699 - 1.704
2V:
Measured: 82° to 88°, Calculated: 80° to 86°
Max. Birefringence:
δ = 0.057 - 0.060
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.
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.
Surface Relief:
Moderate
Dispersion:
relatively strong
Chemistry of Clinokurchatovite
Mindat Formula:
Ca(Mg,Fe2+,Mn2+)[B2O5]
Element Weights:
Crystallography of Clinokurchatovite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/b
Cell Parameters:
a = 12.19 Å, b = 10.95 Å, c = 5.59 Å
β = 102°
β = 102°
Ratio:
a:b:c = 1.113 : 1 : 0.511
Unit Cell V:
729.85 ų (Calculated from Unit Cell)
Z:
8
Twinning:
Contact and polysynthetic on {010}.
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) |
|---|---|---|---|---|---|---|---|
| 0006974 | Clinokurchatovite | Callegari A, Mazzi F, Tadini C (2003) Modular aspects of the crystal structures of kurchatovite and clinokurchatovite European Journal of Mineralogy 15 277-282 | 2003 | Sayak, Kazackhstan | 0 | 293 | |
| 0015602 | Clinokurchatovite | Yakubovich O V, Yamnova N A, Shchedrin B M, Simonov M A, Belov N V (1976) Crystal structure of magnesium kurchatovite CaMg[B2O5] Soviet Physics Doklady 21 294-295 | 1976 | Siberia, Russia | 0 | 293 | |
| 0015608 | Clinokurchatovite | Simonov M A, Egorov-Tismenko Y K, Yamnova M A, Belokoneva E L, Belov N V (1980) Crystal structure of natural monoclinic kurchatovite Ca2(Mg0.86Fe0.14)(Mg0.92Fe0.08)[B2O5]2 Soviet Physics Doklady 25 1125-1128 | 1980 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.045 Å | (10) |
| 2.799 Å | (10) |
| 3.093 Å | (8) |
| 1.937 Å | (8) |
| 2.586 Å | (5) |
| 2.027 Å | (5) |
| 1.236 Å | (5) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47) | |
| 28 : Photo-alteration, pre-biotic |
Type Occurrence of Clinokurchatovite
General Appearance of Type Material:
grains
Place of Conservation of Type Material:
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 82777.
Geological Setting of Type Material:
boron ore
Associated Minerals at Type Locality:
Other Language Names for Clinokurchatovite
Related Minerals - Strunz-mindat Grouping
| 6.BA.05 | Suanite | Mg2[B2O5] |
| 6.BA.10 | Kurchatovite | Ca(Mg,Mn2+)[B2O5] |
| 6.BA.15 | Szaibélyite | MgBO2(OH) |
| 6.BA.15 | Sussexite | Mn2+BO2(OH) |
| 6.BA.20 | Wiserite | (Mn2+,Mg)14(B2O5)4(OH)8 · (Si,Mg)(O,OH)4Cl |
Other Information
IR Spectrum:
Sayak-IV deposit material [cm-1]: 1389s, 1353s, 1325s, 1269, 1180s, 979w, 856, 785sh, 759, 711, 669, 625, 617, 507w, 406, 389
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 Clinokurchatovite
mindat.org URL:
https://www.mindat.org/min-1079.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Clinokurchatovite
Reference List:
Dunn, Pete J., Fleischer, Michael, Francis, Carl A., Langley, Richard H., Kissin, Stephen A., Shigley, Hames E., Vanko, David A., Zilczer, Janet A. (1984) New mineral names. American Mineralogist, 69 (7-8) 810-815
Callegari, Athos, Mazzi, Fiorenzo, Tadini, Carla (2003) Modular aspects of the crystal structures of kurchatovite and clinokurchatovite. European Journal of Mineralogy, 15 (2) 277-282 doi:10.1127/0935-1221/2003/0015-0277
Localities for Clinokurchatovite
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.
Kazakhstan (TL) | |
| Pekov (1998) |
Russia | |
| maurice.strahlen.org (2004) |
| Chukanov (2014) |
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Sayak 4 Deposit, Sayak Cu ore field, Balkhash, Karaganda Region, Kazakhstan