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Vistepite Mineral Data

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General Vistepite Information

Help on Chemical  Formula: Chemical Formula: Mn++4Sn++++B2(SiO4)4(OH)2
Help on Composition: Composition: Molecular Weight = 762.43 gm
   Manganese  28.82 %  Mn   37.22 % MnO
   Silicon    14.73 %  Si   31.52 % SiO2
   Tin        15.57 %  Sn   19.77 % SnO2
   Boron       2.84 %  B     9.13 % B2O3
   Hydrogen    0.26 %  H     2.36 % H2O
   Oxygen     37.77 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+4SnB2(SiO4)4(OH)2
Help on Environment: Environment: In a rhodonite vein in biotite-quartz hornfels at the margin of a tin-bearing granite massif.
Help on IMA Status: IMA Status: Approved IMA 1992
Help on Locality: Locality: From Muzeinyi Sai [Museum Valley], near the Trudovye tin deposit, Inyl'chek Mountains, eastern Kyrgyzstan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Victor Ivanovich Stepanov (1924-1988), mineralogist, A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia.
Help on Name Pronunciation: Name Pronunciation: Vistepite + Pronunciation Say VISTEPITE
Help on Synonym: Synonym: ICSD 84256
  PDF 46-1408

Vistepite Image

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Comments: Translucent platy vistepite fragment.
Location: Inelchek, Dara-Pioz, Tien-Shan, Tadzhikistan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Vistepite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.9467:1:1.0407
Help on Cell Dimensions: Cell Dimensions: a = 6.973, b = 7.365, c = 7.665, Z = 1; alpha = 89.94°, beta = 62.94°, gamma = 76.88° V = 341.40 Den(Calc)= 3.71
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.392(1), 3.21(0.82), 2.23(0.69),

Physical Properties of Vistepite

Help on Cleavage: Cleavage: {hkl} Perfect, {hkl} Perfect, {hkl} Perfect
Help on Color: Color: Yellowish orange.
Help on Density: Density: 3.67
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Vistepite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.011 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.027 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1896,KPDmeas= 0.1927,KC= 0.1948
Ncalc = 1.71 - 1.73
Help on Optical Data: Optical Data: Biaxial (-), a=1.696, b=1.711, g=1.715, bire=0.0190, 2V(Calc)=54, 2V(Meas)=54.3-57.

Calculated Properties of Vistepite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.49 gm/cc
note: Specific Gravity of Vistepite =3.67 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEVistepite = 53.27 barns/electron
U=PEVistepite x rElectron Density= 185.66 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Vistepite is Not Radioactive

Vistepite Classification

Help on  Dana Class: Dana Class: (78)Unclassified silicates
  (78.01)possible nesosilicates
  (78.01.10)Dana Group Vistepite Mn4SnB2(SiO4)4(OH)2 P1 1
Help on  Strunz Class: Strunz Class: 09.BD.25 09 - SILICATES (Germanates)
  09.B - Sorosilicates
  09.BD -Si2O7 groups with additional anions;
09.BD.25 Vistepite Mn4SnB2(SiO4)4(OH)2 P1 1

Other Vistepite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Am.Min.,Vol.79,p1013,1994) OPTIC PROP.(Am.Min.,Vol.79,p1013,1994)
Help on See Also: See Also: Links to other databases for Vistepite :
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: 09.BD.25





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