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Chromferide

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Chromferide
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Chromferide
SEM image of ~0.28x0.18x0.15 mm micro-nugget of pure, analyticaly confirmed Chromferide extracted from heavy fraction of unspecified gold placer in area of Kumak gold deposit - the type locality of the species. Note microporous structure of this unusual compound - it able to contain Quartz in its pores. Note also imprints of octahedral crystals (chromite? pyrite?) on surface of the nugget. Kumak ore field, Orenburgskaya Oblast', Southern Urals, Urals Region, Russia
Copyright: Pavel M. Kartashov; Contribution: Stefan
Location: Russland/Wolga, Föderationskreis/Orenburg, Oblast/Orsk/Kumak
Mineral: Chromferide
Image: 1438193116
License: Usage for Mineralienatlas project only
Chromferide

SEM image of 0.28x0.18x0.15 mm micro-nugget of pure, analyticaly confirmed Chromferide extracted from heavy fraction of unspecified gold placer in area of Kumak gold deposit - the type locality of...

Copyright: Pavel M. Kartashov
Contribution: Stefan 2015-07-29
Locality: Kumak / Orsk / Orenburg, Oblast / Wolga, Föderationskreis / Russland

Collectors Summary

Color grauweiß
Lustre Metallglanz
Hardness (Mohs) 4 - 4.5
Crystal System kubisch, Pm3m

Chemism

Chem­ical formula

Fe1.5Cr0.2

Chem­ical com­po­si­tion

Chrom, Eisen

Unit weight: 94.167032 u; Number of atoms in the formula: 1.7

Info

Empirical formula:

Fe1.5Cr0.2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Chromium

Cr

11.04

0.2

11.76

51.9961600

10.3992320

Iron

Fe

88.96

1.5

88.24

55.8452000

83.7678000

Anal­y­sis wt%

Ø Fe : 88.91, Cr : 11.30 (Ref: Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 1904-1974 86)

Strunz 9th edi­tion incl. updates

1.AE.15

1: Elemente (Metalle, intermetallische Legierungen, Metalloide u. Nichtmetalle, Carbide, Silicide, Nitride u. Phosphide)
A: Metalle und intermetallische Legierungen
E: Eisen-Chrom-Familie
15:Wairauit-Gruppe

Lapis Clas­sifica­tion

I/A.06-030

I: ELEMENTE
A: Metalle und intermetallische Verbindungen

Clas­sifica­tion by Hölzel

1.AF.160

1: ELEMENTS
A: Metals, Intermetallic Compounds, and Alloys
F: Fe-Cr-Group
1: cubic

Hey's Chem­ical Index of Min­er­als

01.58

01: Elements and Alloys (including the arsenides, antimonides and bismuthides of Cu, Ag and Au)

Dana 8th edi­tion

01.01.12.02

01: Native Elements and Alloys
01: Native Elements with metallic elements other than the platinum group

IMA sta­tus

Anerkannt von der CNMNC

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

grauweiß

Diaphane­ity (Trans­parency)

opak

Lus­tre

Metallglanz

Anisotropism

isotropisch

Reflec­tiv­ity: (Lambda nm) ↓, ↑, Ø

(440) 50.40, , 50.40
(460) 51.40, , 51.40
(480) 50.90, , 50.90
(500) 52.60, , 52.60
(520) 53.00, , 53.00
(540) 55.30, , 55.30
(560) 56.50, , 56.50
(580) 56.90, , 56.90
(600) 57.90, , 57.90
(620) 58.30, , 58.30
(640) 59.00, , 59.00
(660) 60.00, , 60.00
(680) 60.70, , 60.70
(700) 60.80, , 60.80

Reflection chart Chromferide

Reflec­tiv­ity Ø

55.98

Crystallography

Crystal Sys­tem

kubisch

Class (H-M)

m3m

Space Group number

221

Space Group

Pm3m

Cell param­e­ters a (Å)

2.859

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

1

Volumne (ų)

23.369

X-Ray Pow­der Diffrac­tion

2.87(2),
2.02(10),
1.656(1),
1.43(8),
1.28(5),
1.16(10),
1.01(7)

XRD chart Chromferide

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

Crystals 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

4 - 4.5

VHN (Hard­ness Vick­ers)

260 (100g)

Density (g/cm³)

6.69 (berechnet)

6.691 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Russland/Wolga, Föderationskreis/Orenburg, Oblast/Orsk/Kumak/Efim

Type material

A. E. Fersman Mineralogical Museum, Academy of Sciences, Moskau, Russland

Preface

Name from

Für die chemische Zusammensetzung, CHROMium (Chrom) und FERrum (Eisen)

Author (Name, Year)

Novgorodova & Gorshkov & Turbkin & Tsepin & Dmitrieva, 1986

References

Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva 115 (1986), 355.

American Mineralogist 73 (1988), 190 (Zusammenfassung).

Other languages

German

Chromferid

French

Chromferide

English

Chromferide

Spanish

Cromferuro

Russian

Хромферид

Traditional Chinese

方鉻鐵礦

Simplified Chinese

方铬铁矿

CNMNC (IMA)-Number

IMA 1984-021

CNMNC symbol

Symbol

Cfe

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

German pages

DeWikiPedia - search for: Chromferid
Google-Bilder-Suche - search for: Chromferid
Mineralienatlas.de (Forum) - search for: Chromferid

English pages

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

Russian pages

Webmineral.ru - search for: Хромферид

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Chromferid
Crystal-Treasure.com - search for: Chromferid
Bosse - search for: Chromferid
Edelsteine Neuburg - Gundolf Fischer - search for: Chromferid
Geolitho marketplace, by and for collectors - search for: Chromferid

Locations with GPS information