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About KurchatoviteHide

Igor Vasilyevich Kurchatov
Pale gray
Specific Gravity:
Crystal System:
Named in honor of Igor Vasil’evich Kurchatov (Игорь Васильевич Курчатов) (12 January 1903, Simsky Zavod, Ufa Governorate, Russian Empire – 7 February 1960, Moscow, Soviet Union), physicist, Institute of Nuclear Energy, Moscow, Russia. He is widely known as the director of the Soviet atomic bomb project.

Hayashi et al. (2017) report a Fe(II) analogue (Mg-rich).

Classification of KurchatoviteHide

Approval year:
First published:

B : Diborates
A : Neso-diborates with double triangles B2(O,OH)5; 2(2D); 2(2D) + OH, etc.

4 : A2[X2O5]

9 : Borates
7 : Borates of Mn

Physical Properties of KurchatoviteHide

Pale gray
4½ on Mohs scale
One perfect, parallel elongation; two imperfect
3.02 g/cm3 (Measured)    

Optical Data of KurchatoviteHide

Biaxial (-)
RI values:
nα = 1.635(1) nβ = 1.681(1) nγ = 1.698(1)
Measured: 66°
Max Birefringence:
δ = 0.063
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
r > v slight

Chemical Properties of KurchatoviteHide

IMA Formula:

Crystallography of KurchatoviteHide

Crystal System:
Cell Parameters:
a = 11.15(2) Å, b = 36.4(1) Å, c = 5.55(1) Å
a:b:c = 0.306 : 1 : 0.152
Unit Cell V:
2,252.52 ų (Calculated from Unit Cell)
Granular to 4mm

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0006973KurchatoviteCallegari A, Mazzi F, Tadini C (2003) Modular aspects of the crystal structures of kurchatovite and clinokurchatovite European Journal of Mineralogy 15 277-2822003Solongo, Siberia0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
2.78 Å(100)
1.922 Å(90)
2.67 Å(80)
1.232 Å(80)
2.26 Å(70)
2.01 Å(70)
1.633 Å(60)

Type Occurrence of KurchatoviteHide

General Appearance of Type Material:
Masses. Replaced by a fine-grained aggregate of szaibelyite, calcite and chlorite.
Place of Conservation of Type Material:
A. E. Fersman Museum, Moscow, Russia.
Geological Setting of Type Material:
Iron bearing skarn
Associated Minerals at Type Locality:
Malinko, S.V., Lisitsin, A.E., Dorofeeva, K.A., Ostravskaya, I.V., Shashkin, D.P. (1966) Kurchatovite - new mineral. Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 95(2): 203-209.

Synonyms of KurchatoviteHide

Other Language Names for KurchatoviteHide

Simplified Chinese:硼镁钙石
Traditional Chinese:硼鎂鈣石

Common AssociatesHide

Associated Minerals Based on Photo Data:
3 photos of Kurchatovite associated with FedorovskiteCa2Mg2B4O7(OH)6
3 photos of Kurchatovite associated with LudwigiteMg2Fe3+(BO3)O2
2 photos of Kurchatovite associated with SakhaiteCa12Mg4(BO3)7(CO3)4(OH)2Cl
1 photo of Kurchatovite associated with FroloviteCa[B(OH)4]2
1 photo of Kurchatovite associated with SzaibélyiteMgBO2(OH)

Related Minerals - Nickel-Strunz GroupingHide

6.BA.05SuaniteMg2[B2O5]Mon. 2/m : P21/b
6.BA.15SussexiteMn2+BO2(OH)Orth. 2 2 2 : P21 21 2
6.BA.15SzaibélyiteMgBO2(OH)Mon. 2/m
6.BA.20Wiserite(Mn2+,Mg)14(B2O5)4(OH)8 · (Si,Mg)(O,OH)4ClTet.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

9.7.4SussexiteMn2+BO2(OH)Orth. 2 2 2 : P21 21 2
9.7.5Wiserite(Mn2+,Mg)14(B2O5)4(OH)8 · (Si,Mg)(O,OH)4ClTet.
9.7.9BlatteriteSb5+3(Mn3+,Fe3+)9(Mn2+,Mg)35(BO3)16O32Orth. mmm (2/m 2/m 2/m) : Pnnm
9.7.10TusioniteMn2+Sn4+[BO3]2Trig. 3 : R3

Fluorescence of KurchatoviteHide

Bright violet in long wave UV

Other InformationHide

IR Spectrum:
Solongo material [cm-1]: 3550w, 3495w, 1469, 1440sh, 1387s, 1356s, 1323s, 1277, 1277, 1223s, 1170sh, 1159s, 984w, 977w, 856, 787, 761, 713, 669, 633, 614, 509, 462, 422, 405
Thermal Behaviour:
DTA shows a weak endothermal reaction at 765°, (due to calcite?) and a sharp endothermal effect at 1000° (melting).
Insoluble in water, slowly soluble when heated in 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.

References for KurchatoviteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Malinko, S.V., Lisitsin, A.E., Dorofeeva, K.A., Ostravskaya, I.V., Shashkin, D.P. (1966): Kurchatovite - new mineral. Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 95(2): 203-209.
Fleischer, M. (1966) New mineral names. American Mineralogist: 51: 1815-1820 (1817).
Fleischer, M. (1969) New mineral names. American Mineralogist: 54: 326-330.
Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva (1978): 107: 276.
Malinko, S.V., I.I. Khalturina, A.A. Ozol, V.M. Bocharov (1991) Minerals of boron,- Moscow, Nedra, pp. 108-110 (in Russian).
Pekov, I.V. (1998) Minerals first discovered on the territory of the Former Soviet Union, - Moscow, Ocean Pictures, p.235.
Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).
Callegari, A., Mazzi, F., Tadini, C. (2003) Modular aspects of the crystal structures of kurchatovite and clinokurchatovite. European Journal of Mineralogy: 15: 277-282.
Chukanov, N.V. (2014): Infrared spectra of mineral species: Extended library. Springer (Springer Geochemistry/Mineralogy), vol. 1, Dordrecht, 1726 pp.
Hayashi, A., Momma, K., Miyawaki, R., Tanabe, M., Kishi, S., Kobayashi, S., Kusachi, I. (2017): Kurchatovite from the Fuka mine, Okayama Prefecture, Japan. Journal of Mineralogical and Petrological Sciences: 112: 159-165.
Pankova, Y.A., Krivovichev, S.V., Pekov, I.V., Grew, E.S., Yapaskurt, V.O. (2018) Kurchatovite and clinokurchatovite, ideally CaMgB2O5: An example of modular polymorphism. Minerals: 8: 332.

Internet Links for KurchatoviteHide

Localities for KurchatoviteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • Okayama Prefecture
    • Takahashi City
      • Bicchu-cho (Bitchu-cho)
        • Fuka
Ayaka Hayashi, Koichi Momma, Ritsuro Miyawaki, Mitsuo Tanabe, Shigetomo Kishi, Shoichi Kobayashi, Isao Kusachi (2017): Kurchatovite from the Fuka mine, Okayama Prefecture, Japan. Journal of Mineralogical and Petrological Sciences 112, 159-165.
  • Sakha Republic (Yakutia)
    • Polar Yakutia
      • Dogdo River Basin
        • Tas-Khayakhtakh Range
          • Titovskoe B deposit
Chukanov, N.V. (2014): Infrared spectra of mineral species: Extended library. Springer (Springer Geochemistry/Mineralogy), vol. 1, Dordrecht, 1726 pp.
  • Zabaykalsky Krai
    • Buriatia Republic (Buryatia)
      • Baunt District
        • Vitim Plateau
[AmMin 85:1322]; American Mineralogist, Volume 87, pages 1509–1513, 2002; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Mineral and/or Locality  
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