Abstract
A crystal-chemical study of "high-aluminium titanites', where XAl=Al/(Al+Ti+Fe3+)≥0.25, has been made using single-crystal X-ray diffractometry on four samples from three different rock-types and localities. The first refinement of a natural pure CaTiOSiO4 titanite in the P21/a space group is also presented. All of the high-aluminium titanites studied have A2/a space group symmetry with linear trends between geometrical and chemical parameters. Increasing Al content provokes a strong contraction of the octahedral site geometry. -from Authors
Original language | English |
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Pages (from-to) | 777-792 |
Number of pages | 16 |
Journal | European Journal of Mineralogy |
Volume | 3 |
Issue number | 5 |
DOIs | |
State | Published - 1991 |
Externally published | Yes |