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Magnesiochromite

Pictures (3 Images total)

Magnesiochromit
Views (File:
1590221421
): 476
Magnesiochromit
Türkei/Zentralanatolien/Kayseri, Provinz. Bildbreite 1,3 mm
Copyright: Ulrich Baumgärtl; Contribution: Ulrich Baumgärtl
Collection: Ulrich Baumgärtl
Location: Türkei/Zentralanatolien/Kayseri, Provinz
Mineral: Magnesiochromite
Image: 1590221421
License: Usage for Mineralienatlas project only
Magnesiochromit

Türkei/Zentralanatolien/Kayseri, Provinz. Bildbreite 1,3 mm

Collection: Ulrich Baumgärtl
Copyright: Ulrich Baumgärtl
Contribution: Ulrich Baumgärtl 2020-05-23
Locality: Kayseri, Provinz / Zentralanatolien / Türkei
Magnesiochromit
Views (File:
1590221624
): 477
Magnesiochromit
Türkei/Zentralanatolien/Kayseri, Provinz. Bildbreite 1,4 mm
Copyright: Ulrich Baumgärtl; Contribution: Ulrich Baumgärtl
Collection: Ulrich Baumgärtl
Location: Türkei/Zentralanatolien/Kayseri, Provinz
Mineral: Magnesiochromite
Image: 1590221624
License: Usage for Mineralienatlas project only
Magnesiochromit

Türkei/Zentralanatolien/Kayseri, Provinz. Bildbreite 1,4 mm

Collection: Ulrich Baumgärtl
Copyright: Ulrich Baumgärtl
Contribution: Ulrich Baumgärtl 2020-05-23
Locality: Kayseri, Provinz / Zentralanatolien / Türkei
Magnesiochromit
Views (File:
1696620298
): 42
Magnesiochromit
blockige Einschlüsse in Matrix, Bb = 10 mm, Fundort: ⚒ Red Pit, Fulton Township, Lancaster Co., Pennsylvania, US Modified by CombineZP
Copyright: Manfred Früchtl; Contribution: Manfred Früchtl
Collection: verkaufsmaterial Lithothek der Münchnener Micromounter
Location: USA/Pennsylvania/Lancaster Co./Fulton Township/Red Pit Mine
Mineral: Magnesiochromite
Image: 1696620298
License: Usage for Mineralienatlas project only
Magnesiochromit

blockige Einschlüsse in Matrix, Bb = 10 mm, Fundort: ⚒ Red Pit, Fulton Township, Lancaster Co., Pennsylvania, US Modified by CombineZP

Collection: verkaufsmaterial Lithothek der Münchnener Micromounter
Copyright: Manfred Früchtl
Contribution: Manfred Früchtl 2023-10-06
Locality: Red Pit Mine / Fulton Township / Lancaster Co. / Pennsylvania / USA

Collectors Summary

Color schwarz
Streak color dunkelgrau
Hardness (Mohs) 5.5
Crystal System kubisch, Fd3m

Chemism

Chemical formula

MgCr2O4

Chemical composition

Chrom, Magnesium, Sauerstoff

Unit weight: 192.2951 u; Number of atoms in the formula: 7

Info

Empirical formula:

MgCr2O4

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

33.28

4

57.14

15.9994300

63.9977200

Magnesium

Mg

12.64

1

14.29

24.3050600

24.3050600

Chromium

Cr

54.08

2

28.57

51.9961600

103.9923200

Strunz 9th edition incl. updates

4.BB.05

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
B: Metall: Sauerstoff = 3:4 und vergleichbare
B: Mit ausschließlich mittelgroßen [Kationen]
05:Spinel-Gruppe

Lapis Classification

IV/B.03-010

IV: OXIDE
B: Oxide mit Verhältnis Metall zu Sauerstoff = 3:4 (Spinelltyp M3O4 und verwandte Verbindungen)
3: Spinell-Gruppe; Chromit-Spinelle

Classification by Hölzel

4.BC.100

4: OXIDES
B: Spinels R3O4
C: Cr-Spinels

Dana 8th edition

07.02.03.01

07: Multiple Oxides
02: Multiple Oxides (A+ B++)2 X4 Spinel group
03: (Chromium subgroup)

IMA status

Erstbeschreibung vor CNMNC-Gründung (1959), als Mineral meist anerkannt

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Spinel supergroup  ⇒ Oxyspinel group  ⇒ Spinel subgroup

Optical Properties

Color

schwarz

Streak color

dunkelgrau

Crystallography

Crystal System

kubisch

Class (H-M)

m3m

Space Group number

227

Space Group

Fd3m

Cell parameters a (Å)

8.277

Cell parameters b (Å)

-

Cell parameters c (Å)

-

Cell parameters a/b or c/a

1

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

8

Volume (ų)

567.047

X-Ray Powder Diffraction

4.813(60),
2.945(10),
2.512(100),
2.406(10),
2.083(50),
1.603(40),
1.473(50),
1.409(10)

XRD chart Magnesiochromite

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

5.5

VHN (Hardness Vickers)

1468 (100g)

Density (g/cm³)

4.2 (gemessen)

4.505 ( ρ calc. Mineralienatlas )

Preface

Author (Name, Year)

Bock, 1868

References

Handbook of Mineralogy (Anthony et al.), 3 (1997), 330

IMA group assignments

Other languages

German

Magnesiochromit

French

Magnesiochromite

English

Magnesiochromite

Spanish

Magnesiocromita

Russian

Магнезиохромит

Simplified Chinese

镁铬铁矿

Japanese

クロム苦土鉱

Alternative Name

Chrome-Spinel (of Boldyrev)

Chrome-Spinel (of Boldyrev)

Ferrichromspinel

Spanish

Magnesiochromita

Magnesiochromite (of Bock)

Magnesiochromite (of Simpson)

Magnochromite (of Fisher)

German

Mitchellit

Spanish

Mitchellita

Mitchellite

Japanese

苦土クロム石

Simplified Chinese

镁铬尖晶石

CNMNC symbol

Symbol

Mchr

Rock part of

Locations with GPS information

IDs

GUSID (Global unique identifier short form) YHu2M0I26024wuuBS7GsLQ
GUID (Global unique identifier) 33B67B60-3642-4DEB-B8C2-EB814BB1AC2D
Database ID 2295