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Chenmingite

Collectors Summary

Crystal System orthorhombisch, Pnma

Chemism

Chemical formula

FeCr2O4

Chemical composition

Chrom, Eisen, Sauerstoff

Unit weight: 223.83524 u; Number of atoms in the formula: 7

Info

Empirical formula:

FeCr2O4

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Oxygen

O

28.59

4

57.14

15.9994300

63.9977200
Chromium

Cr

46.46

2

28.57

51.9961600

103.9923200
Iron

Fe

24.95

1

14.29

55.8452000

55.8452000

Strunz 9th edition incl. updates

4.CC.

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
C: Metall: Sauerstoff = 2: 3,3: 5, und vergleichbare
C: Mit großen und mittelgroßen Kationen

IMA status

anerkannt - CNMNC Newsletter 38 - Juli 2017

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Marokite supergroup

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

62

Space Group

Pnma

Cell parameters a (Å)

9.715(6)

Cell parameters b (Å)

2.87(1)

Cell parameters c (Å)

9.49(7)

Cell parameters a/b or c/a

3.385

Cell parameters c/b

3.307

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Volume (ų)

264.601

Crystal structure

Dimorph von Chromit; Struktur bestimmt

X-Ray Powder Diffraction

2.672(100),
2.637(37),
2.387(49),
2.366(20),
2.071(28),
1.585(23),
1.262(21),
1.431(18)
XRD chart Chenmingite

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

(Co-)Type locality

(Co-)Type locality

Marokko/Souss-Massa, Region/Tata, Provinz/Tissint/Tissint Meteorit

Type material

Typematerial wird gelagert in der Meteorit Sammlung des the Frank H. McClung Museum, University of Tennessee, Knoxville, Tennessee 37996, USA, Tissint section UT2

Preface

Author (Name, Year)

Chi Ma und Oliver Tschauner (2017)

References

Ma, C. and Tschauner, O. (2017) Chenmingite, IMA 2017-036. CNMNC Newsletter No. 38, August 2017, page 1037; Mineralogical Magazine, 81, 1033–1038

IMA group assignments

Other languages

German

Chenmingit

English

Chenmingite

Simplified Chinese

陈鸣石

CNMNC (IMA)-Number

IMA 2017-036

CNMNC symbol

Symbol

Cnm

Locations with GPS information

IDs

GUSID (Global unique identifier short form) ufMHpnu9cEGmf6XYk9b17A
GUID (Global unique identifier) A607F3B9-BD7B-4170-A67F-A5D893D6F5EC
Database ID 8408