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Chromium

Big Photo

Sichuan Province, China
© Thomas Witzke

Formula:
Cr
System:IsometricColour:White
Lustre:MetallicHardness:9
This page provides mineralogical data about Chromium.

Classification of Chromium

IMA status:Approved
Strunz 8th edition ID:1/A.06-10
Nickel-Strunz 10th (pending) edition ID:1.AE.05

1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
A : Metals and Intermetallic Alloys
E : Iron-chromium family
Dana 7th edition ID:1.1.15.1
Dana 8th edition ID:1.1.12.1

1 : NATIVE ELEMENTS AND ALLOYS
1 : Metals, other than the Platinum Group
Hey's CIM Ref.:1.55

1 : Elements and Alloys (including the arsenides, antimonides and bismuthides of Cu, Ag and Au)
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Type Occurrence of Chromium

Type Locality:Yangliuping Ni-Cu-(PGE) deposit, Yangliuping dome, Danba Co., Garzê (Ganzi) Autonomous Prefecture, Sichuan Province, China

Physical Properties of Chromium

Lustre:Metallic
Colour:White
Hardness (Mohs):9

Crystallography of Chromium

Crystal System:Isometric

Optical Data of Chromium

Type:Isotropic

Chemical Properties of Chromium

Formula:
Cr
Essential elements:Cr
All elements listed in formula:Cr

Relationship of Chromium to other Species

Related Minerals - Nickel-Strunz Grouping):
1.AE.05Molybdenum
Mo
1.AE.05Iron
Fe
1.AE.05Kamacite
(Fe,Ni)
1.AE.05Tungsten
W
1.AE.10Taenite
(Fe,Ni)
1.AE.10Tetrataenite
FeNi
1.AE.10Antitaenite
Fe
 
3
Ni
1.AE.15Chromferide
Fe
 
3
Cr
 
1-x
 (x=0.6)
1.AE.15Ferchromide
Cr
 
1.5
Fe
 
0.5-x
1.AE.15Wairauite
CoFe
1.AE.20Awaruite
Ni
 
3
Fe
1.AE.25Jedwabite
Fe
 
7
(Ta,Nb)
 
3
1.AE.30Manganese
Mn
Related Minerals - Hey's Index Grouping:
1.1Copper
Cu
1.2Silver
Ag
1.5Gold
Au
1.6Auricupride
Cu
 
3
Au
1.7Tetra-auricupride
AuCu
1.8Zinc
Zn
1.9Cadmium
Cd
1.10Danbaite
CuZn
 
2
1.11Zhanghengite
CuZn
1.12Mercury
Hg
1.13Kolymite
Cu
 
7
Hg
 
6
1.14Moschellandsbergite
Ag
 
2
Hg
 
3
1.15Eugenite
Ag
 
11
Hg
 
2
1.16Schachnerite
Ag
 
1.1
Hg
 
0.9
1.17Paraschachnerite
Ag
 
3
Hg
 
2
1.18Luanheite
Ag
 
3
Hg
1.19Weishanite
(Au,Ag)
 
3
Hg
 
2
1.20Indium
In
1.21Aluminium
Al
1.22Khatyrkite
(Cu,Zn)Al
 
2
1.23Cupalite
(Cu,Zn)Al
1.24Diamond
C
1.25Graphite
C
1.26Chaoite
C
1.27Lonsdaleite
C
1.28Silicon
Si
1.29Tin
Sn
1.30Lead
Pb
1.31Anyuiite
Au(Pb,Sb)
 
2
1.31Novodneprite
AuPb
 
3
1.32Leadamalgam
HgPb
 
2
1.33Arsenic
As
1.34Arsenolamprite
As
1.35Paxite
CuAs
 
2
1.36Koutekite
Cu
 
5
As
 
2
1.37Domeykite
Cu
 
3
As
1.38Algodonite
(Cu
 
1-x
As
 
x
)
1.39Novakite
Cu
 
20
AgAs
 
10
1.40Kutinaite
Cu
 
2
AgAs
1.41Antimony
Sb
1.42Stibarsen
AsSb
1.43Paradocrasite
Sb
 
3
As
1.44Horsfordite
1.45Cuprostibite
Cu
 
2
(Sb,Tl)
1.46Allargentum
(Ag
 
1-x
Sb
 
x
)
1.47Aurostibite
AuSb
 
2
1.48Dyscrasite
Ag
 
3
Sb
1.49Bismuth
Bi
1.50Maldonite
Au
 
2
Bi
1.51Sulphur
S
 
8
1.52Rosickýite
S
1.53Selenium
Se
1.54Tellurium
Te
1.56Rhenium
Re
1.57Iron
Fe
1.58Chromferide
Fe
 
3
Cr
 
1-x
 (x=0.6)
1.59Ferchromide
Cr
 
1.5
Fe
 
0.5-x
1.60Wairauite
CoFe
1.61Nickel
Ni
1.62Kamacite
(Fe,Ni)
1.63Taenite
(Fe,Ni)
1.64Tetrataenite
FeNi
1.65Awaruite
Ni
 
3
Fe
1.66Palladium
(Pd,Pt)
1.67Potarite
PdHg
1.68Paolovite
Pd
 
2
Sn
1.69Stannopalladinite
(Pd,Cu)
 
3
Sn
 
2
1.70Cabriite
Pd
 
2
SnCu
1.71Taimyrite
(Pd,Cu,Pt)
 
3
Sn
1.72Atokite
(Pd,Pt)
 
3
Sn
1.73Rustenburgite
(Pt,Pd)
 
3
Sn
1.74Zvyagintsevite
(Pd,Pt,Au)
 
3
(Pb,Sn)
1.75Plumbopalladinite
Pb
 
2
Pd
 
3
1.76Osmium
(Os,Ir,Ru)
1.77Iridium
(Ir,Os,Ru)
1.82Platinum
Pt
1.83Hongshiite
PtCu
1.84Niggliite
PtSn
1.85Isoferroplatinum
Pt
 
3
Fe
1.86Tetraferroplatinum
PtFe
1.87Tulameenite
Pt
 
2
CuFe
1.88Ferronickelplatinum
Pt
 
2
FeNi
1.89Rhodium
(Rh,Pt)

Other Names for Chromium

Synonyms:
IMA1980-094
German names:
Chrom
Japanese names:
自然クロム
Russian names:
Хром

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Chromium

Reference List:Yue Suqin, Wang Wenying, and Sun Suqiong (1981): A new mineral--Native chromium. Chinese Science Bulletin [Kexue Tongbao] 26(15), 959-60. - American Mineralogist (1982), 67, 854-55 (abstract).

Internet Links for Chromium

Search Engines:
  • Look for Chromium on Google
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    • External Links:
  • Look for Chromium on Webmineral
  • Look for Chromium on Athena Mineralogy
  • Look for Chromium on Wikipedia
  • Look for Chromium on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Chromium in the Natural History Museum (London) online catalogue
  • Chromium details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
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  • Search for Chromium at Thames Valley Minerals
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  • Fine Minerals from Dan Weinrich Minerals
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • Find Chromium on www.crystalclassics.co.uk
  • Search for Chromium on minvision.com
  • Wendel Minerals - Auktion & Shop
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    Localities for Chromium

    Hide Locality List
    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Australia
     
    • New South Wales
      • Murchison Co.
        • Bingara
    		R.E Brown and W.J Stroud, Metallogenic Study and Mineral Deposit Data Sheets, 1997.
    China
     
    • Henan Province
      • Nanyang Prefecture
        • Tongbai Co.
    		Anthony, Bideaux, Bladh, Nichols: Handbook of Mineralogy, Vol. 3 (1997)
    • Shandong Province
      • Linyi Prefecture
        • Yimeng Mts (Yimeng Shan)
          • Mengyin Co.
            • Mengyin Kimberlite field
              • Changma Kimberlite belt
                • Wangcun deposit
    		Gorshkov, A.I., Titkov, S.V., Yan Nan Bao, Ryabchikov, I.D., and Magazina, L.O. (2006): Geology of Ore Deposits 48(4), 326-334.
    • Sichuan Province
      • Garzê (Ganzi) Autonomous Prefecture
        • Danba Co.
          • Yangliuping dome
    		Yue Suqin, Wang Wenying, and Sun Suqiong (1981): Chinese Science Bulletin [Kexue Tongbao] 26(15), 959-960
    • Tibet Autonomous Region
      • Shannan Prefecture
        • Qusum (Qusong) Co.
    		Wenji Bai, Robinson, P.T., Qingsong Fang, Jingsui Yang, Binggang Yan, Zhongming Zhang, Xufeng Hu, Meifu Zhou, and Malpas, J. (2000): Canadian Mineralogist 38(3), 585-598.
    Japan
     
    • Nansei Archipelago
      • Okinawa Prefecture
    		Acta Mineralogica Sinica, 6:224-227 (1986)
    Russia
     
    • Eastern-Siberian Region
      • Saha Republic (Sakha Republic; Yakutia)
        • Daldyn-Alakit kimberlite field
          • Daldyn
    		[AmMin 84:993]
      • Transbaikalia (Zabaykalye)
        • Irkutskaya Oblast'
          • Bodaibo Region
    		http://www.igem.ru/igem/chem/pt/sukhloge.htm
    • Urals Region
      • Southern Urals
        • Orenburgskaya Oblast'
          • Kumak ore field
    The Moon
     
    • Mare Crisium
    		P.M. Kartashov data
    Mineral and/or Locality
    Google
     
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