Kilchoanite Taylor H F W Mineralogical Magazine 38 (1971) 26-31 The crystal structure of kilchoanite, Ca6(SiO4)(Si3O10), with some comments on related phases Locality: Kilchoan, Ardnamurchan, Scotland _database_code_amcsd 0014452 11.42 5.09 21.95 90 90 90 I2cm atom x y z Biso Ca1 -.0134 0 0 1.7 Ca2 .2860 .003 .25 1.3 Ca3 .0107 .005 .1679 1.2 Ca4 .2177 .501 .1040 1.0 Si1 .097 .426 .25 1.3 Si2 .408 .940 .0997 1.0 Si3 .240 0 0 1.4 O1 .164 .297 .1919 1.2 O2 -.033 .293 .25 2.1 O3 .098 .759 .25 .9 O4 .346 .793 .1584 1.2 O5 .035 .707 .0919 1.3 O6 .334 .802 .0402 2.1 O7 .404 .255 .0954 .6 O8 .160 .179 .0412 1.9