General Information:
Chemical Formula:
(H2O,K)2Ti(Mn++,Fe++)2(Fe+++,Ti)2Ti(PO4)4(O,F)2·14(H2O)
Environment:
Phosphate-bearing ranitic pegmatites.
IMA Status:
Approved IMA 1995
Locality:
El Criollo mine, Cerro Balnco mining district in the Sierra Grande, near Tanti, Cordoba Province, Argentina.
Name Origin:
For Maria Angelica R. de Benyacar (1928-), Comision Nacional de Energia Atomica, Buenos Ares, Argentina, for her contribution to mineralogical studies.
Physical Properties:
Cleavage:
[010] Perfect
Color:
yellow, colorless, yellowish white, or greenish yellow.
Density:
2.4
Diaphaniety:
Transparent to translucent
Habits:
Euhedral Crystals - Occurs as well-formed crystals showing good external form., ,
Hardness:
2.5-3 - Finger Nail-Calcite
Luminescence:
Non-fluorescent.
Luster:
Vitreous (Glassy)
Streak:
white
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