The criystal structure of prehnite (Ca2(Al,Fe) (OH)2 [ Si3AlO10])from Komiža (Yugoslavia) has been refined in the space group P2cm (a=4,646(2) Ǻ, b= 5.491(3) Ǻ, c=18.52(3) Ǻ, Z=2). Si and Al showed a completely ordered distribution in the structure. The obtained Fe-Alsubstitution for the octahedral coordination is 17%. No monoclinic domains could be observed in the crystals. Laue photographs show that the splitting of the diffraction maxima in prehnite from Komiža is due to lattice rotation around the direction of the b axis.
CRYSTAL-STRUCTURE OF PREHNITE FROM KOMIZA
MOLIN, GIANMARIO
1990
Abstract
The criystal structure of prehnite (Ca2(Al,Fe) (OH)2 [ Si3AlO10])from Komiža (Yugoslavia) has been refined in the space group P2cm (a=4,646(2) Ǻ, b= 5.491(3) Ǻ, c=18.52(3) Ǻ, Z=2). Si and Al showed a completely ordered distribution in the structure. The obtained Fe-Alsubstitution for the octahedral coordination is 17%. No monoclinic domains could be observed in the crystals. Laue photographs show that the splitting of the diffraction maxima in prehnite from Komiža is due to lattice rotation around the direction of the b axis.
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