000			003190000a22001330004500
008			140223b1990 xxu||||| |||| 00| 0 eng d
041			_aENG
080			_aH22OEz7 N0
082			_aH22OEz7 N0
100			_aKerrick (D M)
245			_aA12Si05 polmorphs
260			_aWashington _bM S A _c1990
650			_aPetrology
999			_c31808 _d31808