Chromferide
A valid IMA mineral species
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About Chromferide
Formula:
Fe3Cr1-x (x=0.6)
Colour:
White, grey
Lustre:
Metallic
Hardness:
4
Specific Gravity:
6.69 (Calculated)
Crystal System:
Isometric
Name:
For the chemical composition.
Type Locality:
Possibly an analogue of ferchromide. Compare chemically similar 'UM1981-05-E:CrFe' and 'UM1981-06-E:CrFeNiSi'.
Unique Identifiers
Mindat ID:
1035
Long-form identifier:
mindat:1:1:1035:7
GUID
(UUID V4):
(UUID V4):
ac88aa37-54ca-489f-9ec9-ac43287e27ec
IMA Classification of Chromferide
Approved
IMA Formula:
Fe1.5Cr0.2
Classification of Chromferide
1.AE.15
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
A : Metals and Intermetallic Alloys
E : Iron-chromium family
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
A : Metals and Intermetallic Alloys
E : Iron-chromium family
Dana 7th ed.:
1.1.16.1
1.1.12.2
1 : NATIVE ELEMENTS AND ALLOYS
1 : Metals, other than the Platinum Group
1 : NATIVE ELEMENTS AND ALLOYS
1 : Metals, other than the Platinum Group
1.58
1 : Elements and Alloys (including the arsenides, antimonides and bismuthides of Cu, Ag and Au)
1 : Elements and Alloys (including the arsenides, antimonides and bismuthides of Cu, Ag and Au)
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Cfe | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Chromferide
Metallic
Transparency:
Opaque
Colour:
White, grey
Hardness:
4 on Mohs scale
Hardness:
VHN100=260 kg/mm2 - Vickers
Density:
6.69 g/cm3 (Calculated)
Optical Data of Chromferide
Reflectivity:
Wavelength | R |
---|---|
440nm | 50.4% |
480nm | 50.9% |
520nm | 53.0% |
560nm | 56.5% |
600nm | 57.9% |
640nm | 59.0% |
680nm | 60.7% |
700nm | 60.8% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 60.8%.
Chemistry of Chromferide
Mindat Formula:
Fe3Cr1-x (x=0.6)
Elements listed:
Crystallography of Chromferide
Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Pm3m
Setting:
Pm3m
Cell Parameters:
a = 2.8959(5) Å
Unit Cell V:
24.29 ų (Calculated from Unit Cell)
Morphology:
Small grains
Comment:
Z=0.5
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
2.02 Å | (100) |
1.16 Å | (100) |
1.43 Å | (80) |
1.01 Å | (70) |
1.28 Å | (50) |
2.87 Å | (20) |
1.656 Å | (10) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Near-surface Processes | |
23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47) | |
Stage 5: Initiation of plate tectonics | <3.5-2.5 |
40 : Regional metamorphism (greenschist, amphibolite, granulite facies) |
Type Occurrence of Chromferide
Place of Conservation of Type Material:
Fersman museum
Geological Setting of Type Material:
Quartz veins
Synonyms of Chromferide
Other Language Names for Chromferide
Common Associates
Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
1.AE. | Vanadium | V |
1.AE.05 | Molybdenum | Mo |
1.AE.05 | Chromium | Cr |
1.AE.05 | Iron | Fe |
1.AE.05 | Tungsten | W |
1.AE.05 | UM2001-06-E:CrFeNi | Fe7Cr2Ni |
1.AE.05 | Hexamolybdenum | (Mo,Ru,Fe,Ir,Os) |
1.AE.10 | Taenite | (Fe,Ni) |
1.AE.10 | Tetrataenite | FeNi |
1.AE.10 | Antitaenite | Fe3Ni |
1.AE.15 | Ferchromide | Cr3Fe1-x |
1.AE.15 | Wairauite | CoFe |
1.AE.20 | Awaruite | Ni3Fe |
1.AE.25 | Jedwabite | Fe7(Ta,Nb)3 |
1.AE.30 | Manganese | Mn |
1.AE.35 | Nisnite | Ni3Sn |
Other Information
Magnetism:
Diamagnetic
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Chromferide
mindat.org URL:
https://www.mindat.org/min-1035.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
References for Chromferide
Localities for Chromferide
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
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Kazakhstan | |
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Syria | |
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USA | |
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The Moon | |
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Quick NavTopAbout ChromferideUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Yangliuping Cu-Ni-PGE deposit, Yangliuping Cu-Ni-PGE ore field, Danba Co., Garzê Autonomous Prefecture, Sichuan, China