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Pertsevite Mineral Data

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General Pertsevite Information

Help on Chemical  Formula: Chemical Formula: Mg2(BO3)F
Help on Composition: Composition: Molecular Weight = 130.82 gm
   Calcium     0.31 %  Ca    0.43 % CaO
   Magnesium  35.11 %  Mg   58.23 % MgO
   Manganese   0.42 %  Mn    0.54 % MnO
   Iron        2.99 %  Fe    3.84 % FeO
   Silicon     3.86 %  Si    8.27 % SiO2
   Boron       7.02 %  B    22.62 % B2O3
   Hydrogen    0.19 %  H     1.72 % H2O
   Oxygen     42.68 %  O
   Fluorine    7.41 %  F     7.41 % F
                -   %   F    -3.12 % -O=F2    
             ______        ______ 
             100.00 %       99.94 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg1.89Fe2+0.07Mn2+0.01Ca0.01B0.85Si0.18O3.24F0.51(OH)0.25
Help on Environment: Environment: Contact-metasomatic kotoite marble. Isostructural with Mg2(BO3)F; structure determined.
Help on IMA Status: IMA Status: Approved IMA 2003 (Dana # Added)
Help on Locality: Locality: Near the mouth of Kebirin´┐Żya Creek, a northern tributary of Dogdo River, in the basin of the River Yana, about 250 km east of Verkhoyansk, Sakha-Yakutia, Russia Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: After Nikolai Nikolayewich Pertsev (b. 1930), IGEM, Moscow, in recognition of his work on boron minerals and deposits.
Help on Synonym: Synonym: IMA2002-030

Pertsevite Image

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Comments: Backscattered electron (BSE) picture of pertsevite (P, darker grey) partially replacing clinohumite (C, lighter grey). The still lighter grey mineral with cleavage at the top contacting only pertsevite is calcite. (Eur. J. Mineral, 15:1008).
Location: Contact-metasomatic kotoite marble from the region east of Verkhoyansk, Sakha-Yakutia, northeastern Siberia.. Scale: See Image.
© Eur. J. Mineral

Pertsevite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =4.4826:1:2.6011
Help on Cell Dimensions: Cell Dimensions: a = 20.49, b = 4.571, c = 11.89, Z = 12; V = 1,113.61 Den(Calc)= 2.34
Help on Crystal System: Crystal System: Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: P na21
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.2409(1)(414), 1.7081(0.92)(424), 2.7425(0.77)(313),2.2344(0.49)(810), 2.4737(0.49)(114), 2.4137(0.46)(711), 1.7053(0.44)(820),

Physical Properties of Pertsevite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless.
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Anhedral Grains - Granular minerals without the expression of crystal shapes
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Pertsevite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= -0.327 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2665,KC= 0.2008
Ncalc = 1.47
Help on Optical Data: Optical Data: Biaxial (+), a=1.609, b=1.62, g=1.642, bire=0.0330, 2V(Calc)=72, 2V(Meas)=65. Dispersion dispersion not observed.

Calculated Properties of Pertsevite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.31 gm/cc
note: Specific Gravity of Pertsevite =2.34 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.05
Boson Index = 0.95
Help on Photoelectric: Photoelectric: PEPertsevite = 2.07 barns/electron
U=PEPertsevite x rElectron Density= 4.78 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Pertsevite is Not Radioactive

Pertsevite Classification

Help on  Dana Class: Dana Class: (25)Anhydrous Borates Containing Hydroxyl or Halogen
  (25.06)Dana Type
  (25.06.04)Dana Group Pertsevite! Mg2(BO3)F P na21 mm2 IMA2008-060! Mg2(BO3)(OH) P nma 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 06.AB.75 06 - BORATES
  06.A - Monoborates
  06.AB -BO3, with additional anions; 1(D) + OH, etc.
06.AB.75 Pertsevite! Mg2(BO3)F P na21 mm2
06.AB.75 IMA2008-060! Mg2(BO3)(OH) P nma 2/m 2/m 2/m

Other Pertsevite Information

Help on References: References: NAME( CanMin, 42:1251) PHYS. PROP.(CanMin, 42:1251) OPTIC PROP.(CanMin, 42:1251)
Help on See Also: See Also: Links to other databases for Pertsevite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Dana No: Strunz No: 06.AB.75





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