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Chrombismite

A valid IMA mineral species
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Formula:
Bi3+16Cr6+O27
Colour:
Black to brownish black
Lustre:
Adamantine
Hardness:
Specific Gravity:
4.5 - 4.8
Crystal System:
Isometric
Name:
Named for the chemical composition that includes CHROMium and BISMuth.
This page provides mineralogical data about Chrombismite.


Hide all sections | Show all sections

Unique IdentifiersHide

Mindat ID:
6871
Long-form identifier:
mindat:1:1:6871:6
GUID
(UUID V4):
574a1a83-1665-43dc-a83b-e5bfe761ab5e

IMA Classification of ChrombismiteHide

Classification of ChrombismiteHide

4.CC.05

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
C : Metal: Oxygen = 2: 3,3: 5, and similar
C : With large and medium-sized cations
Dana 7th ed.:
35.4.5.1

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
CbisIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of ChrombismiteHide

Adamantine
Transparency:
Translucent, Opaque
Colour:
Black to brownish black
Streak:
Brown
Hardness:
5½ on Mohs scale
Hardness:
VHN100=1278 - 1456 kg/mm2 - Vickers
Tenacity:
Brittle
Parting:
Parting may develop along {111}.
Fracture:
Irregular/Uneven
Density:
4.5 - 4.8 g/cm3 (Measured)    5.12 g/cm3 (Calculated)

Optical Data of ChrombismiteHide

Type:
Uniaxial (+)
RI values:
nω = 2.500 nε = 2.550
Max Birefringence:
δ = 0.050
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Reflectivity:
WavelengthR1R2
420nm16.3%21.9%
440nm19.9%22.9%
460nm19.5%21.4%
470nm19.4%21.4%
480nm20.1%21.9%
500nm21.6%23.7%
520nm23.6%25.3%
540nm24.2%27.1%
546nm25.2%27.5%
560nm25.8%28.7%
580nm26.1%29.8%
589nm26.2%29.8%
600nm26.3%29.3%
620nm27.1%29.4%
640nm26.5%30.2%
650nm25.9%29.9%
660nm25.6%29.1%
680nm24.8%28.3%
700nm24.7%27.7%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 30.2%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Gray-white with a brownish tint
Internal Reflections:
Brownish red

Chemistry of ChrombismiteHide

Mindat Formula:
Bi3+16Cr6+O27

Crystallography of ChrombismiteHide

Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Cell Parameters:
a = 8.344 Å
Unit Cell V:
580.93 ų (Calculated from Unit Cell)
Z:
8
Twinning:
On {111} as both twin and composition plane, the spinel law.
Comment:
Space Group: F d3m (synthetic)

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
2.499 Å(100)
1.592 Å(90)
1.461 Å(90)
2.070 Å(70)
2.93 Å(60)
1.079 Å(60)
0.846 Å(60)

Geological EnvironmentHide

Paragenetic Mode(s):

Type Occurrence of ChrombismiteHide

General Appearance of Type Material:
Isolated crystals about 2 x 5 to 25 x 50 µm in size or as fine-grained aggregates about 10 to 500 µm.
Place of Conservation of Type Material:
National Museum for Geology, Beijing, China.
Geological Setting of Type Material:
Mesothermal gold-bearing sulfide-quartz veins in gneiss.
Associated Minerals at Type Locality:
Reference:
Zhou Xinchun, Yan Jincai, Wang Guanxin, Wang Shizhong, Liu Liang, and Shu Guiming (1996): A new oxide of bismuth and chromium - Chrombismite. Acta Mineralogica Sinica 16(1), 335-339 (in Chinese with English abstract). - New Minerals 1995-1999, 48 (abstract). Zhou Xinchun, Yan Jincai, Wang Guanxin, Wang Shizhong, Liu Liang, and Shu Guiming (1997): Chrombismite, Bi16CrO27, a new mineral species from the Jialu gold mine, Shaanxi Province, China. Canadian Mineralogist 35, 35-38.

Synonyms of ChrombismiteHide

Other Language Names for ChrombismiteHide

Spanish:Crombismita

Related Minerals - Strunz-mindat GroupingHide

4.CC.XuiteCa3Fe3+2[(AlO3(OH)]3Iso. m3m (4/m 3 2/m)
4.CC.AllendeiteSc4Zr3O12Trig. 3 : R3
4.CC.BitikleiteCa3(Sb5+Sn4+)[AlO4]3Iso. m3m (4/m 3 2/m) : Ia3d
4.CC.Yttriaite-(Y)Y2O3Iso. m3 (2/m 3)
4.CC.ChlorkyuygeniteCa12Al14O32[(H2O)4Cl2]Iso. 4 3m : I4 3d
4.CC.Anzaite-(Ce)Ce3+ 4Fe2+Ti6O18 (OH)2Mon. 2/m : B2/m
4.CC.Heamanite-(Ce)(K0.5Ce0.5)TiO3Iso. m3m (4/m 3 2/m)
4.CC.Priscillagrewite-(Y)(Ca2Y)Zr2(AlO4)3Iso.
4.CC.SaranovskiteSrCaFe2+2(Cr4Ti2)Ti12O38Trig. 3 : R3
4.CC.BotuobinskiteSrFe2+Mg2(Cr3+6Ti4+12)[O36(OH)2]Trig. 3 : R3
4.CC.MirnyiteSrZr4+Mg2(Cr3+6Ti4+12)O38Trig. 3 : R3
4.CC.Haitaite-(La)LaU4+Fe3+2(Ti13Fe2+4Fe3+)O38Trig. 3 : R3
4.CC.ShagamiteKFe11O17Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
4.CC.10FreudenbergiteNa2(Ti,Fe)8O16Mon.
4.CC.10FluormayeniteCa12Al14O32F2Iso. 4 3m : I4 3d
4.CC.10FluorkyuygeniteCa12Al14O32[(H2O)4F2]Iso. 4 3m : I4 3d
4.CC.15GrossiteCaAl4O7Mon. 2/m : B2/b
4.CC.17GoldschmidtiteKNbO3Iso. m3m (4/m 3 2/m) : Pm3m
4.CC.20ChlormayeniteCa12Al14O32[◻4Cl2]Iso. 4 3m : I4 3d
4.CC.20Unnamed (HBU UK-4)NaFe2+Zn2(Ti,Fe3+,Nb)6Ti12O38Trig. 3 : R3
4.CC.20PaseroitePbMn2+(Mn2+,Fe3+)2(V5+,Ti,◻)18O38 Trig. 3 : R3
4.CC.20Mianningite(◻,Pb,Ce,Na)(U4+,Mn,U6+)Fe3+2 (Ti,Fe3+)18O38Trig. 3 : R3
4.CC.20UM1987-03-O:FePbTiU~(U,Pb)(Ti,Fe3+,Fe2+,Mn)21O38Trig. 3 : R3
4.CC.22KahlenbergiteKAl11O17Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
4.CC.22GoreriteCaAlFe3+11O19Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
4.CC.25YafsoaniteCa3Te6+2(ZnO4)3Iso. m3m (4/m 3 2/m) : Ia3d
4.CC.25NixoniteNa2Ti6O13Mon. 2/m : B2/m
4.CC.30LatrappiteCa2NbFe3+O6Orth. mmm (2/m 2/m 2/m) : Pnma
4.CC.30LueshiteNaNbO3Orth. mmm (2/m 2/m 2/m)
4.CC.30NatroniobiteNaNbO3Mon.
4.CC.30PerovskiteCaTiO3Orth. mmm (2/m 2/m 2/m) : Pnma
4.CC.30BarioperovskiteBaTiO3Orth. mm2 : Amm2
4.CC.30LakargiiteCa(Zr,Sn,Ti)O3Orth. mmm (2/m 2/m 2/m) : Pnma
4.CC.30MegawiteCaSnO3Orth. mmm (2/m 2/m 2/m) : Pban
4.CC.32UsturiteCa3(Sb5+Zr)[Fe3+O4]3Iso. m3m (4/m 3 2/m) : Ia3d
4.CC.32ElbrusiteCa3(U6+0.5Zr1.5)[Fe3+O4]3Iso. m3m (4/m 3 2/m) : Ia3d
4.CC.32DzhuluiteCa3(Sb5+Sn4+)[Fe3+O4]3Iso. m3m (4/m 3 2/m) : Ia3d
4.CC.32MonteneveiteCa3Sb5+2(Fe3+2Fe2+)O12Iso. m3m (4/m 3 2/m) : Ia3d
4.CC.35Loparite-(Ce)(Na,REE)2Ti2O6Iso. m3m (4/m 3 2/m)
4.CC.35MacedonitePbTiO3Tet. 4/mmm (4/m 2/m 2/m) : P4/nmm
4.CC.35TausoniteSrTiO3Iso. 4 3m
4.CC.35Isolueshite(Na,La)NbO3Iso. m3m (4/m 3 2/m) : Pm3m
4.CC.35Panguite(Ti,Al,Sc,Mg,Zr,Ca)1.8O3Orth. mmm (2/m 2/m 2/m) : Pbca
4.CC.37PauloabibiteNaNbO3Trig. 3 : R3
4.CC.40CrichtoniteSr(Mn,Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH)38Trig. 3 : R3
4.CC.40Davidite-(Ce)Ce(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38Trig. 3 : R3
4.CC.40Davidite-(La)La(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38Trig. 3 : R3
4.CC.40Davidite-(Y)(La,Ce,Na,Ca,Pb)(Y,Fe2+,◻)(Fe2+,Mn2+)2(Ti,Fe3+,Nb,Zr)18O38 (hypothetical)Trig.
4.CC.40LandauiteNaMnZn2(Ti,Fe)6Ti12O38Trig. 3 : R3
4.CC.40Lindsleyite(Ba,Sr)(Zr,Ca)(Fe,Mg)2(Ti,Cr,Fe)18O38Trig.
4.CC.40Loveringite(Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38Trig. 3 : R3
4.CC.40Mathiasite(Mg,Cr,Fe,Ca,K)2(Ti,Zr,Cr,Fe)5O12Trig. 3 : R3
4.CC.40SenaitePb(Mn,Y,U)(Fe,Zn)2(Ti,Fe,Cr,V)18(O,OH)38Trig. 3 : R3
4.CC.40UhligiteCa3(Ti,Al,Zr)9O20 ?Iso.
4.CC.40Dessauite-(Y)(Sr,Pb)(Y,U)(Ti,Fe3+)20O38Trig. 3 : R3
4.CC.40Cleusonite(Pb,Sr)(U4+,U6+)(Fe2+,Zn)2(Ti,Fe2+,Fe3+)18(O,OH)38Trig. 3 : R3
4.CC.40Gramaccioliite-(Y)(Pb,Sr)(Y,Mn)Fe3+2(Ti,Fe3+)18O38Trig. 3 : R3
4.CC.45DiaoyudaoiteNaAl11O17Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
4.CC.45HawthorneiteBaMgTi3Cr4Fe2+2Fe3+2O19Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
4.CC.45HiboniteCaAl12O19Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
4.CC.45LindqvistitePb2Mn2+Fe16O27Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
4.CC.45Magnetoplumbite(Pb,Mn)(Fe,Mn)12O19Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
4.CC.45PlumboferritePb2(Fe3+,Mn2+,Mg)11O19Trig. 3 2 : P3 1 2
4.CC.45YimengiteK(Cr,Ti,Fe,Mg)12O19Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
4.CC.45HaggertyiteBaFe2+4Fe3+2Ti5MgO19Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
4.CC.45NežilovitePbZn2Mn4+2Fe3+8O19Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
4.CC.45BatiferriteBaTi2Fe3+8Fe2+2O19Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
4.CC.45ChihuahuaiteFeAl12O19Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
4.CC.45BarioferriteBaFe3+12O19Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
4.CC.45Kangite(Sc,Ti,Al,Zr,Mg,Ca,◻)2O3 Iso. m3 (2/m 3)
4.CC.45Mizraite-(Ce)Ce(Al11Mg)O19Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
4.CC.50Jeppeite(K,Ba)2(Ti,Fe)6O13Mon. 2/m : B2/m
4.CC.55ZenzénitePb3Fe3+4Mn4+3O15Hex. 6/mmm (6/m 2/m 2/m) : P63/mcm
4.CC.60Mengxianminite (of Huang et al.)(Ca,Na)3(Fe,Mn)2Mg2(Sn,Zn)5Al8O29

Other InformationHide

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 ChrombismiteHide

References for ChrombismiteHide

Localities for ChrombismiteHide

This 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.

Locality ListHide

- 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.
Brazil
 
  • Minas Gerais
    • Conceição do Mato Dentro
      • São José de Brejaúba
Färber (n.d.)
China (TL)
 
  • Shaanxi
    • Shangluo
      • Luonan County
Xinchun Zhou et al. (1997)
 
Mineral and/or Locality  
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