Stishovite Mineral Data

Stishovite Mineral Data +

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General Stishovite Information

Chemical Formula:

SiO2

Composition:

Molecular Weight = 60.08 gm

Silicon 46.74 % Si 100.00 % SiO₂

Oxygen 53.26 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

(SiO₂)

IMA Status:

Approved IMA 1962

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 68409

PDF 45-1374

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Stishovite Crystallography

Axial Ratios:

a:c = 1:0.63768

Cell Dimensions:

a = 4.179, c = 2.6649, Z = 2; V = 46.54 Den(Calc)= 4.29

Crystal System:

Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: P 4/mnm

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

By Intensity(I/I_o): 2.959(1), 1.53(0.5), 1.981(0.35),

Crystal Structure:

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Ross N L , Shu J F , Hazen R M , Gasparik T , American Mineralogist , 75 (1990) p.739-747, High-pressure crystal chemistry of stishovite, P = 0, but in the diamond cell

View Additional jPOWD Structure files for Stishovite
[1] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [2] [20] [21] [22] [23] [24] [3] [4] [5] [6] [7] [8] [9]

Physical Properties of Stishovite

Color:

Colorless.

Density:

4.35

Diaphaniety:

Transparent

Hardness:

7.5-8

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Stishovite

Gladstone-Dale:

CI meas= 0.102 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.089 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1894,KPDmeas= 0.1868,KC= 0.208

Optical Data:

Uniaxial (+), w=1.799, e=1.826, bire=0.0270.

Calculated Properties of Stishovite

Electron Density:

r_electron=4.28 gm/cc
note: r_Stishovite=4.29 gm/cc.

Fermion Index

Fermion Index = 0.02208
Boson Index = 0.97792

Photoelectric:

PE_Stishovite= 1.80 barns/electron
U=PE_Stishovite x r_electron= 7.70 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Stishovite is Not Radioactive

Stishovite Classification

Dana Class:

4.4.1.9 (4)Simple Oxides

(4.4)with a cation charge of 4+ (A++++ O2)

(4.4.1)Rutile group (Tetragonal: P4/mnm)

4.4.1.1 Rutile TiO2 P 4/mnm 4/m 2/m 2/m

4.4.1.2 Ilmenorutile (Ti,Nb,Fe)O2 P 4/mnm 4/m 2/m 2/m

4.4.1.3 Struverite (Ti,Ta,Fe)O2 P 4/mnm 4/m 2/m 2/m

4.4.1.4 Pyrolusite MnO2 P 4/mnm 4/m 2/m 2/m

4.4.1.5 Cassiterite SnO2 P 4/mnm 4/m 2/m 2/m

4.4.1.6 Plattnerite PbO2 P 4/mnm 4/m 2/m 2/m

4.4.1.7 Argutite GeO2 P 4/mnm 4/m 2/m 2/m

4.4.1.8 Squawcreekite? (Fe,Sb,W)O4·(H2O) P 4/mnm 4/m 2/m 2/m

4.4.1.9 Stishovite SiO2 P 4/mnm 4/m 2/m 2/m

Strunz Class:

IV/D.01-60 IV - Oxides

IV/D - Oxides with metal : oxygen = 1:2 (MO2 and related compounds)

IV/D.01 - Quartz group

IV/D.01-10 Quartz SiO2 P 3₁21,P 3₂21 3 2

IV/D.01-20 Tridymite SiO2 F1 1

IV/D.01-30 Cristobalite SiO2 P 4₁2₁2 4 2 2

IV/D.01-35 Moganite! SiO2 I2/a 2/m

IV/D.01-40 Melanophlogite SiO2·n(C,H,O,S) P 4₁/nbc 4/m 2/m 2/m

IV/D.01-40* Melanophlogite-beta! SiO2·n(C,H,O,S) P m3n 4/m 3 2/m

IV/D.01-50 Coesite SiO2 C 2/c 2/m

IV/D.01-60 Stishovite SiO2 P 4/mnm 4/m 2/m 2/m

IV/D.01-70 Lechatelierite* SiO2 None

IV/D.01-80 Opal SiO2·n(H2O) None

Other Stishovite Information

References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Stishovite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - MinMax(Deutsch)
12 - MinMax(English)
13 - Mineral and Gemstone Kingdom
14 - Mineralienatlas (Deutsch)
15 - QUT Mineral Atlas
16 - Ruff.Info
17 - University of Colorado - Mineral Structure Data
18 - WWW-MINCRYST

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Stishovite

SiO2
Dana No: 4.4.1.9 Strunz No: IV/D.01-60
Locality:

Notes: