Q30. the change in coordination number of silicon (s1) when a-quartz transforms to stishovite, which has octahedral coordination, is (a) 2 (c) 6 (b) 4 (d) 8

The coordination number of stishovite is 6, so the silicon atoms are all surrounded by 6 oxygen atoms. The crystal structure of stishovite does not fit in the classification scheme...

Coordination number of stishovite(high pressure polymorph of quartz having highest density in the quartz family Or polymorphs) is 6 , generally it doesn't have the characteristic t...