'._('einklappen').'
 

Stishovite

Collectors Summary

Color farblos
Streak color weiß
Hardness (Mohs) 7.5 - 8
Solubility + HF
Crystal System tetragonal, P42/mnm
Morphology Aggregate aus submikroskopischen Kristallen

Chemism

Chem­ical formula

SiO2

Chem­ical com­po­si­tion

Silicium, Sauerstoff

Unit weight: 60.08439 u; Number of atoms in the formula: 3

Info

Empirical formula:

SiO2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

53.26

2

66.67

15.9994300

31.9988600

Silicon

Si

46.74

1

33.33

28.0855300

28.0855300

Anal­y­sis wt%

? SiO2 : 99.00

Strunz 9th edi­tion incl. updates

4.DA.15

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
D: Metall: Sauerstoff = 1:2 und vergleichbare
A: Mit kleinen [Kationen]: [Kieselsäure]-Familie
15:Stishovit-Gruppe

Lapis Clas­sifica­tion

IV/D.01-060

IV: OXIDE
D: Oxide mit Verhältnis Metall : Sauerstoff = 1:2 (MO2 und verwandte Verbindungen)
1: Quarz-Reihe

Clas­sifica­tion by Hölzel

4.DB.160

4: OXIDES
D: Dioxides
B: SiO2Modifications

Dana 8th edi­tion

04.04.01.09

04: Oxide Minerals
04: Simple Oxides with a cation charge of 4+ (A++++ O2)
01: Rutile group (Tetragonal: P4/mnm)

IMA sta­tus

Anerkannt von der CNMNC

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

farblos

Streak color

weiß

Diaphane­ity (Trans­parency)

transparent

max. Birefrin­gence

0.027

Birefringence chart\! Stishovite title=Birefringence chart Stishovite

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

1.799s

RI value γ / ε

1.826

Ri mean

1.808

2V angle

Uniaxial (+)

Crystallography

Crystal Sys­tem

tetragonal

Class (H-M)

4/mmm

Space Group number

136

Space Group

P42/mnm

Cell param­e­ters a (Å)

4.179

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

2.665

Cell param­e­ters a/b or c/a

0.638

Cell param­e­ters c/b

-

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

90°

Z

2

Volumne (ų)

46.542

X-Ray Pow­der Diffrac­tion

2.959(100),
2.246(20),
1.981(30),
1.870(10),
1.530(50),
1.478(20),
1.333(10),
1.235(20)

XRD chart Stishovite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Morphol­ogy

Aggregate aus submikroskopischen Kristallen

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

7.5 - 8

VHN (Hard­ness Vick­ers)

1890

Density (g/cm³)

4.29 - 4.35

4.287 ( ρ calc. Mineralienatlas )

Insta­bil­ity

+ HF

Preface

Occurrences

In Meteor-Impakten, wo er durch Schock-Metamorphose aus Quarz bei Temperaturen > 1200 Grad und Drücken 100 kbar gebildet wurde. Halbstabil, altert zu Glas oder Cristobalit bei > 300 Grad.

Asso­cia­tions

Coesit, Quarz, Si-Glas

Rare­ness

selten

Author (Name, Year)

Chao & Fahey & Littler & Milton, 1962

Addi­tional Informa­tion

Modifikation von SiO2, siehe Quarz (Polymorphie).

References

Handbook of Mineralogy (Anthony et al.), 2 (1995), 757

Wenjun Yong, Edgar Dachs, Artur Benisek, Richard A. Secco: Heat capacity, entropy and phase equilibria of stishovite. Physics and Chemistry of Minerals Volume 39, Number 2 (2012) S.153-162.

Related minerals "Strunz Classification" (9. Edition) [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

'Keatite'

SiO2

96

4.DA.15

Stishovite

SiO2

tetragonal : 4/mmm : P42/mnm

4.DA.15

Cristobalite

SiO2

tetragonal : 422 : P41212, P43212

4.DA.15

Related minerals "Lapis Classification" [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Quartz

SiO2

trigonal : 32 : P3121, P3221

IV/D.01-010

Tridymite

SiO2

orthorhombisch : 222 : C2221

IV/D.01-020

Cristobalite

SiO2

tetragonal : 422 : P41212, P43212

IV/D.01-030

Mogánite

SiO2

monoklin : 2/m : I2/a

IV/D.01-035

Melanophlogite

46SiO2 ·6(N2,CO2) ·2(CH4, N2)

tetragonal : 4/mmm : P42/nbc

IV/D.01-040

Coesite

SiO2

monoklin : 2/m : C2/c

IV/D.01-050

Seifertite

SiO2

IV/D.01-055

Stishovite

SiO2

tetragonal : 4/mmm : P42/mnm

IV/D.01-060

'Lechatelierite'

SiO2

amorph

IV/D.01-070

Opal

SiO2·nH2O

IV/D.01-080

Related minerals "Hoelzel Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Tridymite

SiO2

orthorhombisch : 222 : C2221

4.DB.100

Cristobalite

SiO2

tetragonal : 422 : P41212, P43212

4.DB.120

Mogánite

SiO2

monoklin : 2/m : I2/a

4.DB.130

Coesite

SiO2

monoklin : 2/m : C2/c

4.DB.140

Stishovite

SiO2

tetragonal : 4/mmm : P42/mnm

4.DB.160

Seifertite

SiO2

4.DB.180

Related minerals "Dana 8. Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Rutile

TiO2

tetragonal : 4/mmm : P42/mnm

04.04.01.01

Pyrolusite

MnO2

tetragonal : 4/mmm : P42/mnm

04.04.01.04

Cassiterite

SnO2

tetragonal : 4/mmm : P42/mnm

04.04.01.05

Plattnerite

PbO2

tetragonal : 4/mmm : P42/mnm

04.04.01.06

Argutite

GeO2

tetragonal : 4/mmm : P42/mnm

04.04.01.07

Stishovite

SiO2

tetragonal : 4/mmm : P42/mnm

04.04.01.09

Downeyite

SeO2

tetragonal : 4/mmm : P42/mbc

04.04.03.01

Paratellurite

TeO2

tetragonal : 422 : P43212

04.04.03.02

Anatase

TiO2

tetragonal : 4/mmm : I41/amd

04.04.04.01

Brookite

TiO2

orthorhombisch : mmm : Pbca

04.04.05.01

Tellurite

TeO2

orthorhombisch : mmm : Pbca

04.04.06.01

Scrutinyite

alpha-PbO2

orthorhombisch : mmm : Pbcn

04.04.06.02

Ramsdellite

MnO2

orthorhombisch : mmm : Pbnm

04.04.07.01

Nsutite

(gamma-MnO2)Mnx2+Mn1-x4+O2-2x(OH)2x

04.04.08.01

Alternative Name

Stipoverit

Stipoverita

Stipoverite

CNMNC symbol

Symbol

Sti

Automatic Links to external internet sources (Responsibility is with the operator)

German pages

DeWikiPedia - search for: Stishovit
Google-Bilder-Suche - search for: Stishovit
Mineralogisch-Petrographisches-Institut Hamburg - search for: Stishovit

English pages

Mindat - search for: Stishovite
Webmineral - search for:Stishovite
Handbook-of-Mineralogy - search for: Stishovite
RRUFF - Raman, XRD and other mineral data - search for: Stishovite
RRUFF - References and PDF downloads - search for: Stishovite
American-Mineralogist-Crystal-Structure-Database - search for: Stishovite
Athena - search for: Stishovite

Russian pages

Webmineral.ru - search for: Стишовит

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Stishovit
Crystal-Treasure.com - search for: Stishovit
Bosse - search for: Stishovit

Locations with GPS information