Merwinite
	Moore P B, Araki T
	American Mineralogist 57 (1972) 1355-1374
	Atomic arrangement of merwinite, Ca3Mg[SiO4]2, an unusual dense-packed
	structure of geophysical interest
	_database_code_amcsd 0000294
	13.254 5.293 9.328 90 91.90 90 P2_1/a
	atom x y z Biso
	Ca1 .2563 .1789 .2234 .70
	Ca2 .0811 .2271 -.0753 .66
	Ca3 .0978 .7333 .4254 .73
	Mg .0043 .2566 .2535 .42
	Si1 .1326 .2293 .6008 .19
	Si2 .1412 .7280 .0931 .18
	O1 .0740 .2123 .4450 1.04
	O2 .0632 .4193 .6937 .96
	O3 .1253 -.0475 .6773 .76
	O4 .2414 .3618 .5940 .91
	O5 .0768 .7064 -.0591 .87
	O6 .2548 .8130 .0683 .82
	O7 .1266 .4726 .1853 .74
	O8 .0832 -.0424 .1751 .84
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