Vyalsovite Mineral Data

General Vyalsovite Information

Chemical Formula:

FeS•Ca(OH)2•Al(OH)3

Composition:

Molecular Weight = 240.01 gm

Calcium 16.70 % Ca

Aluminum 11.24 % Al

Iron 23.27 % Fe

Hydrogen 2.10 % H

Sulfur 13.36 % S

Oxygen 33.33 % O

______

100.00 %

Empirical Formula:

Fe²⁺SCaAl(OH)₅

Environment:

In a skarn.

IMA Status:

Approved IMA 1990

Locality:

Talnakh, Norilsk, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for Leonid N. Vyalsov (1939-), Russian mineralogist.

Name Pronunciation:

Vyalsovite + Pronunciation

Synonym:

IMA1989-004

Vyalsovite Image

Images:

Vyalsovite

Comments: Purplish vyalsovite. Polished section from microbrobe analysis, in reflected light, parallel nicols.
Location: Komsomolskaya Mine, Talnakh, Norilsk, Russia. Scale: Picture size 0.1 mm.
© Thomas Witzke

Vyalsovite Crystallography

Axial Ratios:

a:b:c =0.6768:1:0.2619

Cell Dimensions:

a = 14.2, b = 20.98, c = 5.496, Z = 8; V = 1,637.35 Den(Calc)= 1.95

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: C mmm ?

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 5.4(1), 2.16(0.5), 4.76(0.4),

Physical Properties of Vyalsovite

Color:

Red.

Density:

1.96

Diaphaneity:

Opaque

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Luster:

Sub Metallic

Calculated Properties of Vyalsovite

Electron Density:

Bulk Density (Electron Density)=1.95 gm/cc
note: Specific Gravity of Vyalsovite =1.95 gm/cc.

Fermion Index:

Fermion Index = 0.0063235533
Boson Index = 0.9936764467

Photoelectric:

PE_Vyalsovite= 9.88 barns/electron
U=PE_Vyalsovite x rElectron Density= 19.27 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Vyalsovite is Not Radioactive

Vyalsovite Classification

Dana Class:

02.14.04.01 (02)Sulfides - Including Selenides and Tellurides

(02.14)(Hydroxyl or Hydrated)

(02.14.04)Dana Group

02.14.04.01 Vyalsovite FeS•Ca(OH)2•Al(OH)3 C mmm ? 2/m 2/m 2/m

Strunz Class:

02.FD.45 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.F - Sulfides of Arsenic, Alkalies; Sulfides with Halide, Oxide, Hydroxide, H2O

02.FD -With O, OH, H2O

02.FD.45 Vyalsovite FeS•Ca(OH)2•Al(OH)3 C mmm ? 2/m 2/m 2/m

Other Vyalsovite Information

References:

NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.77,p201-206,1992)

See Also:

Links to other databases for Vyalsovite :
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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Ask about Vyalsovite here :
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Print or Cut-and-Paste your Vyalsovite Specimen Label here :

Vyalsovite

FeS•Ca(OH)2•Al(OH)3
Dana No: 02.14.04.01 Strunz No: 02.FD.45
Locality:

Notes: