The validity of the structural model of antigorite based on the occurrence of four- and eight-membered tetrahedral rings is confirmed. The quality of crystals, single-crystal X-ray and synchrotron diffraction, lattice geometry, HRTEM interpretations, and coordination chemistry still provide evi¬dence in favor of these refined structures. The arguments used to invalidate this model and support an alternative one based on the occurrence of tetrahedral six-reversals only and octahedral sheet offsets do not hold.
Capitani, G., Mellini, M. (2008). Rationale for the existence of four- and eight-reversals in antigorite. AMERICAN MINERALOGIST, 93(5-6), 796-799 [10.2138/am.2008.2538].
Rationale for the existence of four- and eight-reversals in antigorite
CAPITANI, GIANCARLO;
2008
Abstract
The validity of the structural model of antigorite based on the occurrence of four- and eight-membered tetrahedral rings is confirmed. The quality of crystals, single-crystal X-ray and synchrotron diffraction, lattice geometry, HRTEM interpretations, and coordination chemistry still provide evi¬dence in favor of these refined structures. The arguments used to invalidate this model and support an alternative one based on the occurrence of tetrahedral six-reversals only and octahedral sheet offsets do not hold.
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