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Mariinskite

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Formula:
BeCr2O4
Colour:
black to dark green
Lustre:
Vitreous
Hardness:
Specific Gravity:
4.25
Crystal System:
Orthorhombic
Name:
After the type locality.
Chromium-dominant analogue of Chrysoberyl.



Hide all sections | Show all sections

Classification of MariinskiteHide

Approved
Approval Year:
2011

Physical Properties of MariinskiteHide

Vitreous
Transparency:
Transparent
Colour:
black to dark green
Streak:
light green
Hardness:
8½ on Mohs scale
Hardness:
VHN150=1725 kg/mm2 - Vickers
Density:
4.25(2) g/cm3 (Measured)    4.25 g/cm3 (Calculated)

Optical Data of MariinskiteHide

Type:
Biaxial (+)
RI values:
nα = 2.050 nβ = 2.090(3) nγ = 2.150(1)
2V:
Measured: 80° (10), Calculated: 80.5°
Max Birefringence:
δ = 0.100
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Anisotropism:
weak
Bireflectance:
weak
Colour in reflected light:
gray with a very weak bluish tint
Internal Reflections:
strong - green
Pleochroism:
Strong
Comments:
emerald green on X, yellow green on Y to greenish yellow on Z.
emerald-green (Ng) to yellowish-green (Np).

Chemical Properties of MariinskiteHide

Formula:
BeCr2O4
IMA Formula:
BeCr2O4

Crystallography of MariinskiteHide

Crystal System:
Orthorhombic
Class (H-M):
2 2 2 - Disphenoidal
Space Group:
P21 21 21
Cell Parameters:
a = 9.709(2) Å, b = 5.612(1) Å, c = 4.492(1) Å
Ratio:
a:b:c = 1.73 : 1 : 0.8
Unit Cell V:
244.76 ų (Calculated from Unit Cell)
Z:
4
Twinning:
pseudohexagonal chrysoberyl-type twins
Comment:
Originally assumed to be Pnma.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.85(3)
4.08(4)
3.31(9)
2.629(5)
2.434(5)
2.381(4)
2.139(6)
1.651(10)

Type Occurrence of MariinskiteHide

General Appearance of Type Material:
anhedral fine grains
Place of Conservation of Type Material:
Fersman Mineralogical Museum, Russian Academy of Science, Leninsky Prospect,Moscow, Russia, registration number 4159/1
Geological Setting of Type Material:
Chromite pod in serpentinite
Associated Minerals at Type Locality:

Synonyms of MariinskiteHide

Other Language Names for MariinskiteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Phlogopite8 photos of Mariinskite associated with Phlogopite on mindat.org.
Chromite7 photos of Mariinskite associated with Chromite on mindat.org.

Fluorescence of MariinskiteHide

Other InformationHide

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 MariinskiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Pautov, L.A., Popov, M.P.,Erokhin, Y.V., Khiller, V.V. and Karpenko, V.Y. (2011): Mariinskite, IMA 2011-057. CNMNC Newsletter No. 11, December 2011, page 2888; Mineralogical Magazine, 75, 2887-2893
Pautov, L. A., Popov, M. P., Erokhin, Y. V., Khiller, V. V., & Karpenko, V. Y. (2013). Mariinskite, BeCr2O4, a new mineral, chromium analog of chrysoberyl. Geology of Ore Deposits, 55(8), 648-662.
Yamnova, N.A., Aksenov, S.M., Pautov, L.A., Popov, M.P., Erokhin, Yu.V. (2014): Specific features of cation distribution in the crystal structure of mariinskite BeCr2O4 (Derivative of olivine-type structure). Crystallography Reports, 59, 30-35.
Erokhin, Y. V., Khiller, V. V., Zoloev, K. K., Popov, M. P., & Grigor'ev, V. V. (2014, April). Mariinskite from the Bazhenovskii ophiolite complex: The second finds in the world. In Doklady Earth Sciences (Vol. 455, No. 2, p. 408). Springer Science & Business Media.

Internet Links for MariinskiteHide

Localities for MariinskiteHide

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.
Russia
 
  • Urals Region
    • Middle Urals
      • Sverdlovskaya Oblast'
        • Asbest
Erokhin, Y. V., Khiller, V. V., Zoloev, K. K., Popov, M. P., & Grigor'ev, V. V. (2014). Mariinskite from the Bazhenovskii ophiolite complex: The second finds in the world. In Doklady Earth Sciences (Vol. 455, No. 2, p. 408). Springer Science & Business Media.
        • Ekaterinburg (Sverdlovsk)
          • Malyshevo
            • Izumrudnye Kopi area
Pautov, L.A., Popov, M.P.,Erokhin, Y.V., Khiller, V.V. and Karpenko,V.Y. (2011): Mariinskite, IMA 2011-057. CNMNC Newsletter No. 11, December 2011, page 2888; Mineralogical Magazine, 75, 2887-2893
Mineral and/or Locality  
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