Mineralogy Database

Usovite Mineral Data

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General Usovite Information

Help on Chemical  Formula: Chemical Formula: Ba2CaMgAl2F14
Help on Composition: Composition: Molecular Weight = 658.98 gm
   Barium     41.68 %  Ba   46.53 % BaO
   Calcium     6.08 %  Ca    8.51 % CaO
   Magnesium   3.69 %  Mg    6.12 % MgO
   Aluminum    8.19 %  Al   15.47 % Al2O3
   Fluorine   40.36 %  F    40.36 % F
                -   %   F   -17.00 % -O=F2    
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ba2CaMgAl2F14
Help on Environment: Environment: Fluorite veins.
Help on IMA Status: IMA Status: Approved IMA 1967
Help on Locality: Locality: Upper Noiby River area, Yenisei region, Siberia, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Mikhail Antonovich Usov (1883-1939), Russian geologist.
Help on Name Pronunciation: Name Pronunciation: Usovite Say USOVITE
Help on Synonym: Synonym: ICSD 20393
  PDF 19-1391

Usovite Image

Click Here for Larger   Image in a New Browser Window Images:
Click Here for Larger   Image


Comments: B&W BSE image of a fragment of usovite (Us) and fluorite (Fl) in an epoxy grain mount section.
Location: Pravaya Noiba River (tributary if the Teya), northeastern Enisei Range, Krasnoyarsk region, Russia. Scale: See Image.
© Diederik Visser

Usovite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =2.6086:1:2.7994
Help on Cell Dimensions: Cell Dimensions: a = 13.565, b = 5.2, c = 14.557, Z = 4; beta = 91.35° V = 1,026.54 Den(Calc)= 4.26
Help on Crystal System: Crystal System: Monoclinic Space Group: C 2/c or Cc
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.41(1), 1.75(0.7), 2.04(0.7),

Physical Properties of Usovite

Help on Cleavage: Cleavage: {???} Perfect
Help on Color: Color: Brown, Dark brown, Yellowish brown.
Help on Density: Density: 4.18
Help on Diaphaneity: Diaphaneity: Translucent to Opaque
Help on Fracture: Fracture: Irregular - Flat surfaces (not cleavage) fractured in an irregular pattern.
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Hardness: Hardness: 3.5 - Copper Penny
Help on Luster: Luster: Vitreous - Greasy
Help on Streak: Streak: white

Optical Properties of Usovite

Help on Optical Data: Optical Data: Biaxial (+), a=1.441, b=1.442, g=1.444, bire=0.0030, 2V(Calc)=72, 2V(Meas)=70.
Help on Pleochroism (x): Pleochroism (x): brownish yellow.
Help on Pleochroism (y): Pleochroism (y): brownish yellow.
Help on Pleochroism (z): Pleochroism (z): pale yellow.

Calculated Properties of Usovite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.83 gm/cc
note: Specific Gravity of Usovite =4.26 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.07
Boson Index = 0.93
Help on Photoelectric: Photoelectric: PEUsovite = 187.34 barns/electron
U=PEUsovite x rElectron Density= 716.94 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Usovite is Not Radioactive

Usovite Classification

Help on  Dana Class: Dana Class: (11)Halide Complexes; Alumino-fluorides
  (11.06)with miscellaneous formulae
  (11.06.14)Dana Group Usovite Ba2CaMgAl2F14 C 2/c or Cc Mono
Help on  Strunz Class: Strunz Class: 03.CB.35 03 - HALIDES
  03.C - Complex Halides
  03.CB -Neso-aluminofluorides
03.CB.35 Usovite Ba2CaMgAl2F14 C 2/c or Cc Mono

Other Usovite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Usovite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 03.CB.35





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