#68

Ccca

Example – Magnesiocarpholite, MgAl₂Si₂O₆(OH)₄

The carpholite group includes ferrocarpholite, magnesiocarpholite, vanadiocarpholite, and potassiccarpholite. The name derives from Greek karfos for “straw” and lithos for “stone” due to its crystal habit.

The crystal structure of a Mg-rich carpholite
Locality: southeast Sfinari, West Crete

Viswanathan K
American Mineralogist 66 (1981) 1080-1085

http://webmineral.com/data/Magnesiocarpholite.shtml

CIF
http://rruff.geo.arizona.edu/AMS/download.php?id=00905.cif&down=cif

AlO6 octahedra (blue)
MgO6 octahedra (green)
SiO4 tetrahedra (orange)

3D rotatable model of Magnesiocarpholite

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