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unnamed (vacancy-rich, partially inverted spinelloid silicate)

Collectors Summary

Crystal System tetragonal, I41/amd

Chemism

Chem­ical formula

(Mg,Fe,Si)2(Si,☐)O4

Empir­ical formula (anal­y­sis)

(Mg0.98Fe2+0.61Si0.23Al0.07Ca0.06Na0.04Cr3+0.01)Σ2.00 (Si0.880.12)O4

Chem­ical com­po­si­tion

Eisen, Magnesium, Silicium, Sauerstoff, Vakanz

Unit weight: 158.7901531832 u; Number of atoms in the formula: 7

Info

Empirical formula:

(Mg0.98Fe0.61Si0.23Al0.07Ca0.06Na0.04Cr0.01)(Si0.88Vc0.12)O4

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Vacancy

Vc

0.00

0.12

1.71

0.0000000

0.0000000

Oxygen

O

40.30

4

57.14

15.9994300

63.9977200

Sodium

Na

0.58

0.04

0.57

22.9897702

0.9195908

Magnesium

Mg

15.00

0.98

14.00

24.3050600

23.8189588

Aluminium

Al

1.19

0.07

1.00

26.9815382

1.8887077

Silicon

Si

19.63

1.11

15.86

28.0855300

31.1749383

Calcium

Ca

1.51

0.06

0.86

40.0784000

2.4047040

Chromium

Cr

0.33

0.01

0.14

51.9961600

0.5199616

Iron

Fe

21.45

0.61

8.71

55.8452000

34.0655720

Min­eral sta­tus

Mineralstatus fragwürdig

Crystallography

Crystal Sys­tem

tetragonal

Class (H-M)

4/mmm

Space Group number

141

Space Group

I41/amd

Cell param­e­ters a (Å)

5.896(6)

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

8.416(6)

Cell param­e­ters a/b or c/a

1.427

Cell param­e­ters c/b

-

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

90°

Z

4

Volumne (ų)

292.564

Physical Properties

Density (g/cm³)

3.605 ( ρ calc. Mineralienatlas )

References

Chi MA, Oliver TSCHAUNER, Luca BINDI, John R. BECKETT, and Xiande XIE - Meteoritics & Planetary Science 54, Nr 9, 1907–1918 (2019), doi: 10.1111/maps.13349

Other languages

German

unbenamt (Vakanz-reiches, partiell inverses Spinelloid Silikat)

English

unnamed (vacancy-rich, partially inverted spinelloid silicate)

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

German pages

DeWikiPedia - search for: unbenamt (Vakanz-reiches, partiell inverses Spinelloid Silikat)
Google-Bilder-Suche - search for: unbenamt (Vakanz-reiches, partiell inverses Spinelloid Silikat)
Mineralienatlas.de (Forum) - search for: unbenamt (Vakanz-reiches, partiell inverses Spinelloid Silikat)

English pages

Mindat - search for: unnamed (vacancy-rich, partially inverted spinelloid silicate)
Webmineral - search for:unnamed (vacancy-rich, partially inverted spinelloid silicate)
Handbook-of-Mineralogy - search for: unnamed (vacancy-rich, partially inverted spinelloid silicate)
RRUFF - Raman, XRD and other mineral data - search for: unnamed (vacancy-rich, partially inverted spinelloid silicate)
RRUFF - References and PDF downloads - search for: unnamed (vacancy-rich, partially inverted spinelloid silicate)
American-Mineralogist-Crystal-Structure-Database - search for: unnamed (vacancy-rich, partially inverted spinelloid silicate)
Strahlen.org - search for: unnamed (vacancy-rich, partially inverted spinelloid silicate)

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: unbenamt (Vakanz-reiches, partiell inverses Spinelloid Silikat)
Crystal-Treasure.com - search for: unbenamt (Vakanz-reiches, partiell inverses Spinelloid Silikat)
Bosse - search for: unbenamt (Vakanz-reiches, partiell inverses Spinelloid Silikat)
Edelsteine Neuburg - Gundolf Fischer - search for: unbenamt (Vakanz-reiches, partiell inverses Spinelloid Silikat)

Locations with GPS information