Diopside
	Plonka A M, Dera P, Irmen P, Rivers M L, Ehm L, Parise J B
	Geophysical Research Letters 39 (2012) L24307
	Beta-diopside, a new ultrahigh-pressure polymorph of
	CaMgSi2O6 with six-coordinated silicon
	Note: P = 38.6 GPa
	Locality: natural, not reported
	_database_code_amcsd 0020130
	9.234 8.255 4.959 90 104.592 90 C2/c
	atom x y z Uiso
	Ca 0 .3109 .25 .006
	Mg 0 .0861 .75 .004
	Si .2864 .0990 .2323 .005
	O1 .1096 .0898 .1367 .007
	O2 .3527 .2689 .3341 .011
	O3 .1405 .4726 .0114 .008
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