The mineral occurs as a primary phase associated with pyrite, chalcopyrite, and gold in mesothermal quartz veins. The mineral occurs as a primary phase associated with pyrite, chalc opyrite, and gold in mesothermal quart
IMA Status:
Approved IMA 1995 (Dana # Added)
Locality:
Jialu mine, Luonan, Shaanxi province, China. Link to MinDat.org Location Data.
Name Origin:
Named for the main elements present in the mineral.
Brittle - Generally displayed by glasses and most non-metallic minerals.
Habit:
Acicular - Occurs as needle-like crystals.
Habit:
Columnar - Forms columns
Hardness:
3-3.5 - Calcite-Copper Penny
Luster:
Adamantine
Streak:
brownish yellow
Optical Properties of Chrombismite
Gladstone-Dale:
CI meas= 0.014 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.02 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1547,KPDmeas= 0.1556,KC= 0.1578 Ncalc = 2.55 - 2.56
Optical Data:
Uniaxial (+), w=2.5, e=2.55, bire=0.0500.
Calculated Properties of Chrombismite
Electron Density:
Bulk Density (Electron Density)=8.03 gm/cc note: Specific Gravity of Chrombismite =9.80 gm/cc.
Fermion Index:
Fermion Index = 0.0013455524 Boson Index = 0.9986544476
Photoelectric:
PEChrombismite =1,716.24 barns/electron U=PEChrombismite x rElectron Density=13779.93 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Chrombismite is Not Radioactive
Chemical Formula: 