Publication Date:
2017-09-29
Description:
A series of clinopyroxenes along the CaMgSi 2 O 6 –CaCoSi 2 O 6 join was synthesized by quenching from melts at 1500°C and subsequent annealing at 1250°C (at 0.0001 GPa). This protocol proved to be the most effective to obtain homogenous, impurity-free and stoichiometric pyroxenes. Electron microprobe analyses in energy dispersive mode were conducted and single-crystal X-ray diffraction data were collected on Ca(Co x Mg 1– x )Si 2 O 6 pyroxenes with x = 0.2, 0.4, 0.5, 0.6. Effects of cation substitution at the M 1 site are described. The experimental findings of this study allow us to extend the comparative analysis of the structural features of pyroxenes with divalent cations at the M 1 and M 2 sites.
Print ISSN:
0026-461X
Electronic ISSN:
1471-8022
Topics:
Geosciences