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Chrombismite

A valid IMA mineral species
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Discuss Chrombismite
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Formula:
Bi3+16Cr6+O27
Colour:
Black to brownish black
Lustre:
Adamantine
Hardness:
5½
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.


IMA Formula:
Bi16CrO27
First published:
Type description reference:

Classification of Chrombismite
Dana 7th ed.:
35.4.5.1

Mineral Symbols
Transparency:
Translucent, Opaque

Colour:
Black to brownish black
Streak:
Brown
Hardness:
5½ onMohs 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 Chrombismite
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
Colour in reflected light:
Gray-white with a brownish tint
Internal Reflections:
Brownish red

Chemistry of Chrombismite

Crystallography of Chrombismite
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:
EnstatiteIlmeniteMagnetiteOlivine GroupPentlandite
PlagioclasePyrrhotiteSerpentine Subgroup
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 Chrombismite

Other Language Names for Chrombismite

Related Minerals -Strunz-mindat GroupingIso.m3m(4/m32/m)4.CC.Yttriaite-(Y)Y2O3Iso.m3(2/m3)4.CC.AllendeiteSc4Zr3O12Trig.3 :R34.CC.ChlorkyuygeniteCa12Al14O32[(H2O)4Cl2]Iso.43m :I43d4.CC.BotuobinskiteSrFe2+Mg2(Cr3+6Ti4+12)[O36(OH)2]Trig.3 :R34.CC.MirnyiteSrZr4+Mg2(Cr3+6Ti4+12)O38Trig.3 :R34.CC.Haitaite-(La)LaU4+Fe3+2(Ti13Fe2+4Fe3+)O38Trig.3 :R34.CC.ShagamiteKFe11O17Hex. 6/mmm(6/m2/m2/m) :P63/mmc4.CC.BitikleiteCa3(Sb5+Sn4+)[AlO4]3Iso.m3m(4/m32/m) :Ia3d4.CC.Anzaite-(Ce)Ce3+ 4Fe2+Ti6O18 (OH)2Mon. 2/m :B2/m4.CC.Heamanite-(Ce)(K0.5Ce0.5)TiO3Iso.m3m(4/m32/m)4.CC.Priscillagrewite-(Y)(Ca2Y)Zr2(AlO4)3Iso.4.CC.SaranovskiteSrCaFe2+2(Cr4Ti2)Ti12O38Trig.3 :R34.CC.10FreudenbergiteNa2(Ti,Fe)8O16Mon.4.CC.10FluormayeniteCa12Al14O32F2Iso.43m :I43d4.CC.10FluorkyuygeniteCa12Al14O32[(H2O)4F2]Iso.43m :I43d4.CC.15GrossiteCaAl4O7Mon. 2/m :B2/b4.CC.17GoldschmidtiteKNbO3Iso.m3m(4/m32/m) :Pm3m4.CC.20Unnamed (HBU UK-4)NaFe2+Zn2(Ti,Fe3+,Nb)6Ti12O38Trig.3 :R34.CC.20ChlormayeniteCa12Al14O32[◻4Cl2]Iso.43m :I43d4.CC.20PaseroitePbMn2+(Mn2+,Fe3+)2(V5+,Ti,◻)18O38Trig.3 :R34.CC.20Mianningite(◻,Pb,Ce,Na)(U4+,Mn,U6+)Fe3+2 (Ti,Fe3+)18O38Trig.3 :R34.CC.20UM1987-03-O:FePbTiU~(U,Pb)(Ti,Fe3+,Fe2+,Mn)21O38Trig.3 :R34.CC.22GoreriteCaAlFe3+11O19Hex. 6/mmm(6/m2/m2/m) :P63/mmc4.CC.22KahlenbergiteKAl11O17Hex. 6/mmm(6/m2/m2/m) :P63/mmc4.CC.25NixoniteNa2Ti6O13Mon. 2/m :B2/m4.CC.25YafsoaniteCa3Te6+2(ZnO4)3Iso.m3m(4/m32/m) :Ia3d4.CC.30LatrappiteCa2NbFe3+O6Orth.mmm(2/m2/m2/m) :Pnma4.CC.30NatroniobiteNaNbO3Mon.4.CC.30PerovskiteCaTiO3Orth.mmm(2/m2/m2/m) :Pnma4.CC.30LueshiteNaNbO3Orth.mmm(2/m2/m2/m)4.CC.30BarioperovskiteBaTiO3Orth.mm2 :Amm24.CC.30MegawiteCaSnO3Orth.mmm(2/m2/m2/m) :Pban4.CC.30LakargiiteCa(Zr,Sn,Ti)O3Orth.mmm(2/m2/m2/m) :Pnma4.CC.32UsturiteCa3(Sb5+Zr)[Fe3+O4]3Iso.m3m(4/m32/m) :Ia3d4.CC.32ElbrusiteCa3(U6+0.5Zr1.5)[Fe3+O4]3Iso.m3m(4/m32/m) :Ia3d4.CC.32MonteneveiteCa3Sb5+2(Fe3+2Fe2+)O12Iso.m3m(4/m32/m) :Ia3d4.CC.32DzhuluiteCa3(Sb5+Sn4+)[Fe3+O4]3Iso.m3m(4/m32/m) :Ia3d4.CC.35TausoniteSrTiO3Iso.43m4.CC.35Loparite(Na,REE)2Ti2O6Iso.m3m(4/m32/m)4.CC.35Panguite(Ti,Al,Sc,Mg,Zr,Ca)1.8O3Orth.mmm(2/m2/m2/m) :Pbca4.CC.35Isolueshite(Na,La)NbO3Iso.m3m(4/m32/m) :Pm3m4.CC.35MacedonitePbTiO3Tet. 4/mmm(4/m2/m2/m) :P4/nmm4.CC.37PauloabibiteNaNbO3Trig. 3 :R34.CC.40LandauiteNaMnZn2(Ti,Fe)6Ti12O38Trig.3 :R34.CC.40Mathiasite(Mg,Cr,Fe,Ca,K)2(Ti,Zr,Cr,Fe)5O12Trig.3 :R34.CC.40SenaitePb(Mn,Y,U)(Fe,Zn)2(Ti,Fe,Cr,V)18(O,OH)38Trig.3 :R34.CC.40Gramaccioliite-(Y)(Pb,Sr)(Y,Mn)Fe3+2(Ti,Fe3+)18O38Trig.3 :R34.CC.40Lindsleyite(Ba,Sr)(Zr,Ca)(Fe,Mg)2(Ti,Cr,Fe)18O38Trig.4.CC.40CrichtoniteSr(Mn,Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH)38Trig.3 :R34.CC.40Loveringite(Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38Trig.3 :R34.CC.40Cleusonite(Pb,Sr)(U4+,U6+)(Fe2+,Zn)2(Ti,Fe2+,Fe3+)18(O,OH)38Trig. 3 :R34.CC.40Davidite-(Ce)Ce(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38Trig.3 :R34.CC.40Davidite-(La)La(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38Trig.3 :R34.CC.40Davidite-(Y)(La,Ce,Na,Ca,Pb)(Y,Fe2+,◻)(Fe2+,Mn2+)2(Ti,Fe3+,Nb,Zr)18O38 (hypothetical)Trig.4.CC.40UhligiteCa3(Ti,Al,Zr)9O20 ?Iso.4.CC.40Dessauite-(Y)(Sr,Pb)(Y,U)(Ti,Fe3+)20O38Trig.3 :R34.CC.45DiaoyudaoiteNaAl11O17Hex. 6/mmm(6/m2/m2/m) :P63/mmc4.CC.45YimengiteK(Cr,Ti,Fe,Mg)12O19Hex. 6/mmm(6/m2/m2/m) :P63/mmc4.CC.45NežilovitePbZn2Mn4+2Fe3+8O19Hex. 6/mmm(6/m2/m2/m) :P63/mmc4.CC.45HawthorneiteBaMgTi3Cr4Fe2+2Fe3+2O19Hex. 6/mmm(6/m2/m2/m) :P63/mmc4.CC.45Mizraite-(Ce)Ce(Al11Mg)O19Hex. 6/mmm(6/m2/m2/m) :P63/mmc4.CC.45HaggertyiteBaFe2+4Fe3+2Ti5MgO19Hex. 6/mmm(6/m2/m2/m) :P63/mmc4.CC.45LindqvistitePb2Mn2+Fe16O27Hex. 6/mmm(6/m2/m2/m) :P63/mmc4.CC.45HiboniteCaAl12O19Hex. 6/mmm(6/m2/m2/m) :P63/mmc4.CC.45Kangite(Sc,Ti,Al,Zr,Mg,Ca,◻)2O3Iso.m3(2/m3)4.CC.45ChihuahuaiteFeAl12O19Hex. 6/mmm(6/m2/m2/m) :P63/mmc4.CC.45BarioferriteBaFe3+12O19Hex. 6/mmm(6/m2/m2/m) :P63/mmc4.CC.45PlumboferritePb2(Fe3+,Mn2+,Mg)11O19Trig. 32 :P3124.CC.45BatiferriteBaTi2Fe3+8Fe2+2O19Hex. 6/mmm(6/m2/m2/m) :P63/mmc4.CC.45Magnetoplumbite(Pb,Mn)(Fe,Mn)12O19Hex. 6/mmm(6/m2/m2/m) :P63/mmc4.CC.50Jeppeite(K,Ba)2(Ti,Fe)6O13Mon. 2/m :B2/m4.CC.55ZenzénitePb3Fe3+4Mn4+3O15Hex. 6/mmm(6/m2/m2/m) :P63/mcm4.CC.60Mengxianminite (of Huang et al.)(Ca,Na)3(Fe,Mn)2Mg2(Sn,Zn)5Al8O29

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    • References for ChrombismiteⓘPosse mineFärber (n.d.)
    China (TL)
     
    Xinchun Zhou et al. (1997)
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