Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above
Edenharter A , Nowacki W , Weibel M , Schweizerische Mineralogische und Petrographische Mitteilungen , 57 (1977) p.1-16, Zur struktur und zusammensetzung von cafarsit, cafarsit ein As(III)-oxid,, kein arsenat, Locality: synthetic, Note: Water positions were not determined
Physical Properties of Cafarsite
Cleavage:
None
Color:
Brownish yellow, Brownish black, Dark brown, Dark red.
Density:
3.9
Diaphaneity:
Translucent to Opaque
Fracture:
Brittle - Generally displayed by glasses and most non-metallic minerals.
Hardness:
5.5-6 - Knife Blade-Orthoclase
Luster:
Sub Metallic
Streak:
yellowish brown
Optical Properties of Cafarsite
Optical Data:
NCalc= 1.92 - from Gladstone-Dale relationship (KC = 0.2541) where Ncalc=Dcalc*KC+1 NCalc= 1.99 - from Gladstone-Dale relationship (KC = 0.2541) where Ncalc=Dmeas*KC+1
Calculated Properties of Cafarsite
Electron Density:
Bulk Density (Electron Density)=3.40 gm/cc note: Specific Gravity of Cafarsite =3.61 gm/cc.
Fermion Index:
Fermion Index = 0.01 Boson Index = 0.99
Photoelectric:
PECafarsite = 33.41 barns/electron U=PECafarsite x rElectron Density= 113.73 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Cafarsite is Not Radioactive
Cafarsite Classification
Dana Class:
45.01.04.01(45)Acid and normal Antimonites, Arsenites and Phosphites