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Mongshanite

Collectors Summary

Color schwarz-met.
Hardness (Mohs) 5.00 - 6.00
Crystal System hexagonal,

Additional information / Summary

Mongshanit = Mathiasit [Qi Lu and Zhizhong Peng - Crystal structure of Mathiasite. Acta Petrologica et Mineralogica 6(3) (1987), 221-229 (in Chinesisch mit Englischem Abstrakt)].

Chemism

Chemical formula

(Mg,Cr,Fe2+)2(Ti,Zr,Cr,Fe3+)5O12

Chemical composition

Chrom, Eisen, Magnesium, Titan, Zirconium, Sauerstoff

Unit weight: 571.956173 u; Number of atoms in the formula: 19

Info

Empirical formula:

(Mg0.6Cr0.3Fe0.1)2(Ti0.55Zr0.3Cr0.1Fe0.05)5O12

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

33.57

12

63.16

15.9994300

191.9931600

Magnesium

Mg

5.10

1.2

6.32

24.3050600

29.1660720

Titanium

Ti

23.01

2.75

14.47

47.8671000

131.6345250

Chromium

Cr

10.00

1.1

5.79

51.9961600

57.1957760

Iron

Fe

4.39

0.45

2.37

55.8452000

25.1303400

Zirconium

Zr

23.92

1.5

7.89

91.2242000

136.8363000

Analysis wt%

TiO2 : 60.91, Cr2O3 : 18.58, Al2O3 : 0.42, MgO : 4.56, FeO : 9.70, K2O : 0.97, CaO : 0.42, ZrO2 : 3.80 (Ref: CAGS82)

Strunz 9th edition incl. updates

4.CB.15

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
B: Mit mittelgroßen Kationen
15:Pseudobrookit-Gruppe

Classification by Hölzel

4.CE.194

4: OXIDES
C: R2O3 Sesquioxides
E: Other complex Oxides, mostly hextrig
1: Högbomite-Group

IMA status

Ohne Prüfung durch die CNMNC veröffentlicht. Möglicherweise identisch mit Mathiasit.

Mineral status

Mineralstatus fragwürdig

Optical Properties

Color

schwarz-met.

Crystallography

Crystal System

hexagonal

Cell parameters b (Å)

-

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

120°

X-Ray Powder Diffraction

3.44(40),
2.89(100),
2.26(70),
2.14(70),
1.80(50),
1.60(50),
1.45(70),
0.904(70)

XRD chart Mongshanite

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

Physical Properties

Hardness (Mohs)

5.00 - 6.00

Preface

Author (Name, Year)

Zhou & Zhou & Fang & Yang, 1982

References

American Mineralogist 73 (1988), 441.

Qi Lu and Zhizhong Peng - Crystal structure of Mathiasite. Acta Petrologica et Mineralogica 6(3) (1987), 221-229 (in Chinesisch mit Englischem Abstrakt).

Other languages

German

Mongshanit

Spanish

Mongshanita

English

Mongshanite

French

Mongshanite

IDs

GUSID (Global unique identifier short form) 6FcLyplGzkmJmNnU0X78rA
GUID (Global unique identifier) CA0B57E8-4699-49CE-8998-D9D4D17EFCAC
Database ID 2581