General Information:
Chemical Formula:NaCa2Mg2(VO4)3
Composition:(Molecular Weight = 496.57 gm)Sodium 4.63 %
NaCalcium 16.14 %
CaMagnesium 9.79 %
MgVanadium 30.78 %
V Oxygen 38.66 %
O Empirical Formula: NaCa2Mg2(VO4)3
Environment:Found in a silicate-rich xenolith in leucite tephrite lava. The magnesium dominant analogue of palenzonaite. A member of the Garnet group.
IMA Status:Approved IMA 1998 (Dana # Added)
Locality:Bellberg volcano, near Mayen, Laacher See district, Eifel, Germany.
Name Origin:Named after Helmut Schâfer (b. 1931), amateur mineralogist from Mayen-Krrenberg, specialist in the minerals of the Eifel volcanic area, who discovered the mineral.
Physical Properties: Cleavage:None
Color:red or orange red.
Diaphaniety:Transparent
Habits:Octahedral Crystals - Occurs as octahedral shaped crystals., ,
Hardness:5 - Apatite
Luminescence:Non-fluorescent.
Luster:Vitreous (Glassy)
Streak:yellow
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