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Kolitsch U , Taylor M R , Fallon G D , Pring A , Neues Jahrbuch fur Mineralogie, Monatshefte , 1999 (1999) p.529-544, Springcreekite, BaV(3+)3(PO4)2(OH,H2O)6, a new member of the crandallite group,, from the Spring Creek mine, South Australia: the first natural V(3+)-member of, the alunite family and its crystal structure, Locality: Spring Creek mine, South Australia
Physical Properties of Springcreekite
Cleavage:
{102} Poor
Color:
Black.
Density:
3.48
Diaphaneity:
Opaque to translucent
Fracture:
Brittle - Irregular - Very brittle fracture producing irregular fragments
Habit:
Pseudo Cubic - Crystals show a cubic outline.
Habit:
Rhombohedral Crystals - Occurs as well-formed crystals showing rhobohedral crystals.
Hardness:
4-5 - Fluorite-Apatite
Luster:
Vitreous - Dull
Streak:
brownish black
Optical Properties of Springcreekite
Gladstone-Dale:
CI meas= -0.07 (Fair) - where the CI = (1-KPDmeas/KC) CI calc= -0.014 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2282,KPDmeas= 0.2407,KC= 0.225 Ncalc = 1.78 - 1.83
Optical Data:
Uniaxial (-), e=1.817, w=1.858, bire=0.0410.
Calculated Properties of Springcreekite
Electron Density:
Bulk Density (Electron Density)=3.45 gm/cc note: Specific Gravity of Springcreekite =3.67 gm/cc.
Fermion Index:
Fermion Index = 0.04 Boson Index = 0.96
Photoelectric:
PESpringcreekite = 105.91 barns/electron U=PESpringcreekite x rElectron Density= 365.62 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Springcreekite is Not Radioactive
Springcreekite Classification
Dana Class:
42.07.03.08(42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen