Scandiobabingtonite Mineral Data

General Information
Chemical Formula:	Ca2(Fe2+,Mn)ScSi5O14(OH)
IMA Status:	Approved IMA
Classification
Dana Class:	78.0.0.0 (78)Unclassified Silicate Minerals (78.0)Without Dana Classification Numbers (Unknown)
Crystallography
Axial Ratios:	a:b:c =0.6422:1:0.575
Cell Dimensions:	a = 7.536, b = 11.734, c = 6.748, Z = 2; alpha = 91.7ø, beta = 93.86ø, gamma = 104.53ø V = 576.06
Crystal System:	Triclinic – Pinacoidal H-M Symbol ( -1) Space Group: P1-
X Ray Diffraction:	By Intensity(I/I_o): 2.895(1) 2.969(1) 2.755(0.7)
Physical Properties
Color:	gray.
Density:	3.24
Diaphaniety:	Transparent
Hardness:	6 – Orthoclase
Luster:	Vitreous (Glassy)
Optical Properties
Optical Data:	Biaxial (+), a=1.686, b=1.694, g=1.709, bire=0.0230
Other Information
References:	PHYS. PROP.(Am.Min.,Vol.83,p1330-1334,1998) OPTIC PROP.(Am.Min.,Vol.83,p1330-1334,1998)
See Also:	Frederic Biret
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