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Strunz V H , Contag B , Acta Crystallographica , 13 (1960) p.601-603, Hexahydroxostannate Fe, Mn, Co, Mg, Ca[Sn(OH)6] und deren kristallstruktur, Locality: synthetic
Physical Properties of Natanite
Cleavage:
None
Color:
Greenish brown.
Density:
4.035
Diaphaneity:
Transparent
Hardness:
5 - Apatite
Luster:
Vitreous (Glassy)
Optical Properties of Natanite
Gladstone-Dale:
CI meas= 0.031 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= 0.033 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1869,KPDmeas= 0.1871,KC= 0.1932 Ncalc = 1.78
Optical Data:
Isotropic, n=1.755.
Calculated Properties of Natanite
Electron Density:
Bulk Density (Electron Density)=3.79 gm/cc note: Specific Gravity of Natanite =4.04 gm/cc.
Fermion Index:
Fermion Index = 0.07 Boson Index = 0.93
Photoelectric:
PENatanite = 132.05 barns/electron U=PENatanite x rElectron Density= 500.84 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Natanite is Not Radioactive
Natanite Classification
Dana Class:
06.03.06.03(06)Hydroxides and Oxides Containing Hydroxyl