Chrombismite
A valid IMA mineral species
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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.
Type Locality:
This page provides mineralogical data about Chrombismite.
Unique Identifiers
Mindat ID:
6871
Long-form identifier:
mindat:1:1:6871:6
GUID
(UUID V4):
(UUID V4):
574a1a83-1665-43dc-a83b-e5bfe761ab5e
IMA Classification of Chrombismite
Approved
IMA Formula:
Bi16CrO27
First published:
1997
Classification of Chrombismite
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
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 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 |
---|---|---|
Cbis | 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 Chrombismite
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 Chrombismite
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.
and does not take into account mineral colouration.
Surface Relief:
Very High
Reflectivity:
Wavelength | R1 | R2 |
---|---|---|
420nm | 16.3% | 21.9% |
440nm | 19.9% | 22.9% |
460nm | 19.5% | 21.4% |
470nm | 19.4% | 21.4% |
480nm | 20.1% | 21.9% |
500nm | 21.6% | 23.7% |
520nm | 23.6% | 25.3% |
540nm | 24.2% | 27.1% |
546nm | 25.2% | 27.5% |
560nm | 25.8% | 28.7% |
580nm | 26.1% | 29.8% |
589nm | 26.2% | 29.8% |
600nm | 26.3% | 29.3% |
620nm | 27.1% | 29.4% |
640nm | 26.5% | 30.2% |
650nm | 25.9% | 29.9% |
660nm | 25.6% | 29.1% |
680nm | 24.8% | 28.3% |
700nm | 24.7% | 27.7% |
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 Chrombismite
Mindat Formula:
Bi3+16Cr6+O27
Elements listed:
Crystallography of Chrombismite
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 Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
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 Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Near-surface Processes | |
23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47) | |
High-𝑇 alteration and/or metamorphism | |
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) |
Type Occurrence 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:
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
German:Chrombismit
Spanish:Crombismita
Related Minerals - Strunz-mindat Grouping
4.CC. | Xuite | Ca3Fe3+2[(AlO3(OH)]3 |
4.CC. | Allendeite | Sc4Zr3O12 |
4.CC. | Bitikleite | Ca3(Sb5+Sn4+)[AlO4]3 |
4.CC. | Yttriaite-(Y) | Y2O3 |
4.CC. | Chlorkyuygenite | Ca12Al14O32[(H2O)4Cl2] |
4.CC. | Anzaite-(Ce) | Ce3+ 4Fe2+Ti6O18 (OH)2 |
4.CC. | Heamanite-(Ce) | (K0.5Ce0.5)TiO3 |
4.CC. | Priscillagrewite-(Y) | (Ca2Y)Zr2(AlO4)3 |
4.CC. | Saranovskite | SrCaFe2+2(Cr4Ti2)Ti12O38 |
4.CC. | Botuobinskite | SrFe2+Mg2(Cr3+6Ti4+12)[O36(OH)2] |
4.CC. | Mirnyite | SrZr4+Mg2(Cr3+6Ti4+12)O38 |
4.CC. | Haitaite-(La) | LaU4+Fe3+2(Ti13Fe2+4Fe3+)O38 |
4.CC. | Shagamite | KFe11O17 |
4.CC.10 | Freudenbergite | Na2(Ti,Fe)8O16 |
4.CC.10 | Fluormayenite | Ca12Al14O32F2 |
4.CC.10 | Fluorkyuygenite | Ca12Al14O32[(H2O)4F2] |
4.CC.15 | Grossite | CaAl4O7 |
4.CC.17 | Goldschmidtite | KNbO3 |
4.CC.20 | Chlormayenite | Ca12Al14O32[◻4Cl2] |
4.CC.20 | Unnamed (HBU UK-4) | NaFe2+Zn2(Ti,Fe3+,Nb)6Ti12O38 |
4.CC.20 | Paseroite | PbMn2+(Mn2+,Fe3+)2(V5+,Ti,◻)18O38 |
4.CC.20 | Mianningite | (◻,Pb,Ce,Na)(U4+,Mn,U6+)Fe3+2 (Ti,Fe3+)18O38 |
4.CC.20 | UM1987-03-O:FePbTiU | ~(U,Pb)(Ti,Fe3+,Fe2+,Mn)21O38 |
4.CC.22 | Kahlenbergite | KAl11O17 |
4.CC.22 | Gorerite | CaAlFe3+11O19 |
4.CC.25 | Yafsoanite | Ca3Te6+2(ZnO4)3 |
4.CC.25 | Nixonite | Na2Ti6O13 |
4.CC.30 | Latrappite | Ca2NbFe3+O6 |
4.CC.30 | Lueshite | NaNbO3 |
4.CC.30 | Natroniobite | NaNbO3 |
4.CC.30 | Perovskite | CaTiO3 |
4.CC.30 | Barioperovskite | BaTiO3 |
4.CC.30 | Lakargiite | Ca(Zr,Sn,Ti)O3 |
4.CC.30 | Megawite | CaSnO3 |
4.CC.32 | Usturite | Ca3(Sb5+Zr)[Fe3+O4]3 |
4.CC.32 | Elbrusite | Ca3(U6+0.5Zr1.5)[Fe3+O4]3 |
4.CC.32 | Dzhuluite | Ca3(Sb5+Sn4+)[Fe3+O4]3 |
4.CC.32 | Monteneveite | Ca3Sb5+2(Fe3+2Fe2+)O12 |
4.CC.35 | Loparite-(Ce) | (Na,REE)2Ti2O6 |
4.CC.35 | Macedonite | PbTiO3 |
4.CC.35 | Tausonite | SrTiO3 |
4.CC.35 | Isolueshite | (Na,La)NbO3 |
4.CC.35 | Panguite | (Ti,Al,Sc,Mg,Zr,Ca)1.8O3 |
4.CC.37 | Pauloabibite | NaNbO3 |
4.CC.40 | Crichtonite | Sr(Mn,Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH)38 |
4.CC.40 | Davidite-(Ce) | Ce(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38 |
4.CC.40 | Davidite-(La) | La(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38 |
4.CC.40 | Davidite-(Y) | (La,Ce,Na,Ca,Pb)(Y,Fe2+,◻)(Fe2+,Mn2+)2(Ti,Fe3+,Nb,Zr)18O38 (hypothetical) |
4.CC.40 | Landauite | NaMnZn2(Ti,Fe)6Ti12O38 |
4.CC.40 | Lindsleyite | (Ba,Sr)(Zr,Ca)(Fe,Mg)2(Ti,Cr,Fe)18O38 |
4.CC.40 | Loveringite | (Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38 |
4.CC.40 | Mathiasite | (Mg,Cr,Fe,Ca,K)2(Ti,Zr,Cr,Fe)5O12 |
4.CC.40 | Senaite | Pb(Mn,Y,U)(Fe,Zn)2(Ti,Fe,Cr,V)18(O,OH)38 |
4.CC.40 | Uhligite | Ca3(Ti,Al,Zr)9O20 ? |
4.CC.40 | Dessauite-(Y) | (Sr,Pb)(Y,U)(Ti,Fe3+)20O38 |
4.CC.40 | Cleusonite | (Pb,Sr)(U4+,U6+)(Fe2+,Zn)2(Ti,Fe2+,Fe3+)18(O,OH)38 |
4.CC.40 | Gramaccioliite-(Y) | (Pb,Sr)(Y,Mn)Fe3+2(Ti,Fe3+)18O38 |
4.CC.45 | Diaoyudaoite | NaAl11O17 |
4.CC.45 | Hawthorneite | BaMgTi3Cr4Fe2+2Fe3+2O19 |
4.CC.45 | Hibonite | CaAl12O19 |
4.CC.45 | Lindqvistite | Pb2Mn2+Fe16O27 |
4.CC.45 | Magnetoplumbite | (Pb,Mn)(Fe,Mn)12O19 |
4.CC.45 | Plumboferrite | Pb2(Fe3+,Mn2+,Mg)11O19 |
4.CC.45 | Yimengite | K(Cr,Ti,Fe,Mg)12O19 |
4.CC.45 | Haggertyite | BaFe2+4Fe3+2Ti5MgO19 |
4.CC.45 | Nežilovite | PbZn2Mn4+2Fe3+8O19 |
4.CC.45 | Batiferrite | BaTi2Fe3+8Fe2+2O19 |
4.CC.45 | Chihuahuaite | FeAl12O19 |
4.CC.45 | Barioferrite | BaFe3+12O19 |
4.CC.45 | Kangite | (Sc,Ti,Al,Zr,Mg,Ca,◻)2O3 |
4.CC.45 | Mizraite-(Ce) | Ce(Al11Mg)O19 |
4.CC.50 | Jeppeite | (K,Ba)2(Ti,Fe)6O13 |
4.CC.55 | Zenzénite | Pb3Fe3+4Mn4+3O15 |
4.CC.60 | Mengxianminite (of Huang et al.) | (Ca,Na)3(Fe,Mn)2Mg2(Sn,Zn)5Al8O29 |
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.
Internet Links for Chrombismite
mindat.org URL:
https://www.mindat.org/min-6871.html
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References for Chrombismite
Reference List:
Localities for Chrombismite
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.
Brazil | |
| Färber (n.d.) |
China (TL) | |
| Xinchun Zhou et al. (1997) |
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