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Pannetier J , Denes G , Acta Crystallographica, Section B , 36 (1980) p.2763-2765, Tin(II) oxide: structure refinement and thermal expansion
Physical Properties of Romarchite
Color:
Black.
Habit:
Acicular - Occurs as needle-like crystals.
Habit:
Encrustations - Forms crust-like aggregates on matrix.
Habit:
Microscopic Crystals - Crystals visible only with microscopes.
Hardness:
2-2.5 - Gypsum-Finger Nail
Optical Properties of Romarchite
Optical Data:
NCalc= 1.9 - from Gladstone-Dale relationship (KC = 0.14) where Ncalc=Dcalc*KC+1
Calculated Properties of Romarchite
Electron Density:
Bulk Density (Electron Density)=5.51 gm/cc note: Specific Gravity of Romarchite =6.40 gm/cc.
Fermion Index:
Fermion Index = 0.14 Boson Index = 0.86
Photoelectric:
PERomarchite = 281.75 barns/electron U=PERomarchite x rElectron Density=1,552.78 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Romarchite is Not Radioactive