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Chromium

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Formula:
Cr
System:
Isometric
Colour:
White
Lustre:
Metallic
Hardness:
9
Name:
From the Greek chroma, color, since all chromium compounds are colored.
This page provides mineralogical data about Chromium.

Classification of Chromium

Approved
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 ed.:
1.1.15.1
1.1.12.1

1 : NATIVE ELEMENTS AND ALLOYS
1 : Metals, other than the Platinum Group
1.55

1 : Elements and Alloys (including the arsenides, antimonides and bismuthides of Cu, Ag and Au)
mindat.org URL:
http://www.mindat.org/min-1037.html
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Type Occurrence of Chromium

Geological Setting of Type Material:
Heavy sands derived from contact metamorphic zone between siliceous marble and ultramafic rock.

Physical Properties of Chromium

Metallic
Diaphaneity (Transparency):
Opaque
Colour:
White
Hardness (Mohs):
9
Hardness (Vickers):
VHN100=1875 - 2000
Tenacity:
Brittle
Comment:
On synthetic material
Density:
7.17 g/cm3 (Measured)    7.20 g/cm3 (Calculated)

Crystallography of Chromium

Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Im3m
Space Group Setting:
Im3m
Cell Parameters:
a = 2.8839Å
Unit Cell Volume:
V 23.99 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Grains to 20 microns.
Comment:
Synthetic

Optical Data of Chromium

Type:
Isotropic
Colour in reflected light:
White with yellow tint

Chemical Properties of Chromium

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

Relationship of Chromium to other Species

1.AE.05MolybdenumMo
1.AE.05IronFe
1.AE.05Kamacite(Fe,Ni)
1.AE.05TungstenW
1.AE.05UM2001-06-E:CrFeNiFe7Cr2Ni
1.AE.10Taenite(Fe,Ni)
1.AE.10TetrataeniteFeNi
1.AE.10AntitaeniteFe3Ni
1.AE.15ChromferideFe3Cr1-x (x=0.6)
1.AE.15FerchromideCr3Fe1-x
1.AE.15WairauiteCoFe
1.AE.20AwaruiteNi3Fe
1.AE.25JedwabiteFe7(Ta,Nb)3
1.AE.30ManganeseMn
1.1CopperCu
1.2SilverAg
1.5GoldAu
1.6AuricuprideCu3Au
1.7Tetra-auricuprideAuCu
1.8ZincZn
1.9CadmiumCd
1.10DanbaiteCuZn2
1.11ZhanghengiteCuZn
1.12MercuryHg
1.13KolymiteCu7Hg6
1.14MoschellandsbergiteAg2Hg3
1.15EugeniteAg11Hg2
1.16SchachneriteAg1.1Hg0.9
1.17ParaschachneriteAg3Hg2
1.18LuanheiteAg3Hg
1.19Weishanite(Au,Ag)3Hg2
1.20IndiumIn
1.21AluminiumAl
1.22Khatyrkite(Cu,Zn)Al2
1.23Cupalite(Cu,Zn)Al
1.24DiamondC
1.25GraphiteC
1.26ChaoiteC
1.27LonsdaleiteC
1.28SiliconSi
1.29TinSn
1.30LeadPb
1.31AnyuiiteAu(Pb,Sb)2
1.31NovodnepriteAuPb3
1.32LeadamalgamPb0.7Hg0.3
1.33ArsenicAs
1.34ArsenolampriteAs
1.35PaxiteCuAs2
1.36KoutekiteCu5As2
1.37DomeykiteCu3As
1.38Algodonite(Cu1-xAsx)
1.39NovákiteCu20AgAs10
1.40KutinaiteAg6Cu14As7
1.41AntimonySb
1.42StibarsenAsSb
1.43ParadocrasiteSb3As
1.44HorsforditeCu, Sb
1.45CuprostibiteCu2(Sb,Tl)
1.46Allargentum(Ag1-xSbx)
1.47AurostibiteAuSb2
1.48DyscrasiteAg3Sb
1.49BismuthBi
1.50MaldoniteAu2Bi
1.51SulphurS8
1.52RosickýiteS
1.53SeleniumSe
1.54TelluriumTe
1.56RheniumRe
1.57IronFe
1.58ChromferideFe3Cr1-x (x=0.6)
1.59FerchromideCr3Fe1-x
1.60WairauiteCoFe
1.61NickelNi
1.62Kamacite(Fe,Ni)
1.63Taenite(Fe,Ni)
1.64TetrataeniteFeNi
1.65AwaruiteNi3Fe
1.66Palladium(Pd,Pt)
1.67PotaritePdHg
1.68PaolovitePd2Sn
1.69Stannopalladinite(Pd,Cu)3Sn2
1.70CabriitePd2CuSn
1.71Taimyrite-I(Pd,Cu,Pt)3Sn
1.72Atokite(Pd,Pt)3Sn
1.73Rustenburgite(Pt,Pd)3Sn
1.74Zvyagintsevite(Pd,Pt,Au)3(Pb,Sn)
1.75PlumbopalladinitePd3Pb2
1.76Osmium(Os,Ir,Ru)
1.77Iridium(Ir,Os,Ru)
1.82PlatinumPt
1.83HongshiitePtCu
1.84NiggliitePtSn
1.85IsoferroplatinumPt3Fe
1.86TetraferroplatinumPtFe
1.87TulameenitePt2CuFe
1.88FerronickelplatinumPt2FeNi
1.89Rhodium(Rh,Pt)

Other Names for Chromium

Name in Other Languages:
Afrikaans:Chroom
Albanian:Kromi
Arabic:كروم
Armenian:Քրոմ
Asturian:Cromu
Azeri:Xrom
Basque:Kromo
Belarusian:Хром
Bosnian (Latin Script):Hrom
Bulgarian:Хром
Catalan:Crom
Corsican:Cromu
Croatian:Krom
Czech:Chróm
Danish:Krom
Dutch:Chroom
Esperanto:Kromo
Estonian:Kroom
Finnish:Kromi
French:Chrome
Friulian:Crom
Galician:Cromo
German:Chrom
Haitian:Kwòm
Hebrew:כרום
Hungarian:Króm
Icelandic:Króm
Ido:Kromio
Indonesian:Kromium
Italian:Cromo
Korean:크로뮴
Kurdish (Latin Script):Krom
Latin:Chromium
Latvian:Hroms
Lithuanian:Chromas
Lojban:rogjinme
Low Saxon:Chrom
Luxembourgish:Chrom
Macedonian:Хром
Malay:Kromium
Manx:Cromium
Maori:Konukita
Norwegian (Bokmål):Krom
Norwegian (Nynorsk):Krom
Occitan:Cròme
Persian:کروم
Polish:Chrom
Portuguese:Crômio
Quechua:Krumu
Romanian:Crom
Russian:Хром
Saterland Frisian:Chrom
Serbian (Cyrillic Script):Хром
Serbo-Croatian:Hrom
Sicilian:Cromu
Simplified Chinese:自然铬
Slovak:Chróm
Slovenian:Krom
Spanish:Cromo
Swahili:Chromi
Swedish:Krom
Turkish:Krom
Ukrainian:Хром
Uzbek (Latin Script):Xrom
Vietnamese:Crom

Other Information

Health Risks:
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:
Mingyu Zhu and Yunxiang Liu (1981): Discovery of native chromium in Xizang (Tibet). Chinese Science Bulletin 26(11), 1014-1017.

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

Localities for Chromium

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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
 
  • Northern Territory
    • Central Desert Region
      • Illogwa Creek
Illogwa 1996
Canada
 
  • British Columbia
    • Greenwood Mining Division
      • Bridesville
MINFILE No 082ESW055
China
 
  • Henan Province
    • Nanyang Prefecture
      • Tongbai Co.
Peixue Tian, Qingsong Fang, Keqiao Chen, and Zhizhong Peng (1983): Acta Mineralogica Sinica 3(4), 241-245
      • Xichuan Co.
Zexian Xu, Runji Zhang, Zhenyun Liu, and Xingtu Sheng (1987): Acta Petrologica et Mineralogica 6(4), 351-357
  • Jiangsu Province
    • Lianyungang Prefecture
      • Donghai Co.
        • Maobei
Jingsui Yang, Zhiqin Xu, Wenji Bai, Qingsong Fang, and Zhongming Zhang (2006): 3rd Annual Meeting of the Asia Oceania Geosciences Society (AOGS), July 10-14, 2006, Abstract 59-SE-A0643.
  • 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 Autonomous Prefecture (Ganzi Autonomous Prefecture)
      • Danba Co.
        • Yangliuping Cu-Ni-PGE ore field
Yue Suqin, Wang Wenying, and Sun Suqiong (1981): Chinese Science Bulletin 26(15), 959-960
  • Tibet Autonomous Region
    • Nagchu Prefecture (Naqu Prefecture)
      • Amdo Co. (Anduo Co.)
Mingyu Zhu and Yunxiang Liu (1981): Chinese Science Bulletin 26(11), 1014-1017
    • Shannan Prefecture (Lhokha Prefecture; Lhoka Prefecture)
      • Qusum Co. (Qusong Co.)
Wenji Bai, Jingsui Yang, Qingsong Fang, Binggan Yan, and Zhongming Zhang (2001): Earth Science Frontiers 8(3), 111-121
  • Yunnan Province
    • Dali Autonomous Prefecture
      • Midu Co.
Shengwei Wang, Xiaoming Sun, Zhenwen Liao, Bangguo Zhou, Maojin Luo, Yang Guo, Xiaofang Jiang, Huaping Zhu, Dong Ma, and Zhanwu Shen (2012): Mineral Deposits 31(6), 1259-1276
Japan
 
  • Kyushu Region
    • Nansei Archipelago
      • Okinawa Prefecture
        • Senkaku Islands (Diaoyudao Islands; Diaoyutai Islands)
Bideaux, et al: Handbook of Mineralogy.; Ouroboros - www.um.u-tokyo.ac.jp/museum/ouroboros/01_03/diaoyudaoite.html
Kosovo
 
  • District of Pristina (District of Prishtina)
    • Glavika
Buletini i Shkencave Gjeologjike 2012
Portugal
 
  • Bragança District
    • Bragança
      • Carrazedo
LNEG - Laboratório Nacional de Energia e Geologia, Siorminp ID 249Cr
      • Castrelos
LNEG - Laboratório Nacional de Energia e Geologia, Siorminp ID 75Cr
Russia
 
  • Eastern-Siberian Region
    • Prebaikalia (Pribaikal'e)
      • Irkutskaya Oblast'
        • Bodaibo
          • Lena Gold District
            • Kropotkinsky ore cluster
Keren Tan (1998): Gold Science and Technology 6(4), 29-37
    • Sakha Republic (Saha Republic; Yakutia)
      • Daldyn-Alakit kimberlite field
        • Daldyn
[AmMin 84:993]
  • Urals Region
    • Southern Urals
      • Orenburgskaya Oblast'
        • Kumak ore field
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
  • Western-Siberian Region
    • Polar Urals
      • Tyumenskaya Oblast'
6th orogenic lherzolite conference 2014 Morocco; Yang, J., Meng, F., Xu, X., Robinson, P. T., Dilek, Y., Makeyev, A. B., ... & Cliff, J. (2015). Diamonds, native elements and metal alloys from chromitites of the Ray-Iz ophiolite of the Polar Urals. Gondwana Research, 27(2), 459-485.
The Moon
 
  • Mare Crisium
P.M. Kartashov data
Mineral and/or Locality  
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