Scandium

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Pretulite Mineral Data

pretulite-mineral
General Information
Chemical Formula:ScPO4
Composition:Molecular Weight = 139.93 gm)
  Oxygen45.74 %O
  Phosphorus22.14 %P
  Scandium32.13 %Sc
Environment:Crystalline – Fine – Occurs as well-formed fine-sized crystals., ,
IMA Status:Approved IMA (Dana # Added)
Locality:The type locality is 100 m southwest of Hollkegel, which is 12 km south-southwest of Murzzuschlag, Fischbacher Alpen, Styria, Austria.
Name Origin:For the mountian Pretul, one of the localities at which the mineral occurs.
Synonym:IMA96.024
Classification
Dana Class:38.4.11.5 (38)Anhydrous Phosphates, etc (38.4)A+ XO4 (38.4.11)Zenotime Group (Tetragonal: I41/amd)
Crystallography
Axial Ratios:a:c = 1:0.88116
Cell Dimensions:a = 6.589, c = 5.806, Z = 4; V = 252.07 Den(Calc)= 3.69
Crystal System:Tetragonal – Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: I41/amd
X Ray Diffraction:By Intensity(I/Io): 3.293(1) 1.6927(0.45) 2.4636(0.42)
Physical Properties
Cleavage:[100] Perfect
Color:pale pink.
Density:3.71
Diaphaniety:Transparent
Habits:Crystalline – Fine – Occurs as well-formed fine-sized crystals.
Hardness:5 – Apatite
Luster:Adamantine
Streak:white
Optical Properties
Dichroism (e):none.
Dichroism (w):none.
Optical Data:Uniaxial (+), w=1.709, e=1.86, bire=0.1510.
Other Information
References:NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.83,p625-630,1998) OPTIC PROP.(Am.Min.,Vol.83,p625-630,1998)
See Also: Frederic Biret
 Google
 MinMax

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