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Moore P B , Araki T , Merlino S , Mellini M , Zanazzi P F , American Mineralogist , 66 (1981) p.1034-1049, The arrojadite-dickinsonite series, KNa4Ca(Fe,Mn)14Al(OH)2(PO4)12:, Crystal structure and crystal chemistry, sample NP, Locality: Nickel Plate mine, Keystone, South Dakota, USA
Optical Properties of Arrojadite-(KFe)
Optical Data:
Calculated Properties of Arrojadite-(KFe)
Fermion Index:
Fermion Index = 0.0066834548 Boson Index = 0.9933165452
Photoelectric:
PEArrojadite-(KFe) = 10.02 barns/electron U=PEArrojadite-(KFe) x relectron= . barns/cc.
Radioactivity:
GRapi = 26.90 (Gamma Ray American Petroleum Institute Units)
Concentration of Arrojadite-(KFe) per GRapi unit = 3.72 (%)
Estimated Radioactivity from Arrojadite-(KFe) - barely detectable
Arrojadite-(KFe) Classification
Dana Class:
41.07.02a.02(41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen