Merrillite Dowty E Earth and Planetary Science Letters 35 (1977) 347-351 Phosphate in Angra Dos Reis: Structure and composition of the Ca3(PO4)2 minerals Locality: Angra Dos Reis meteorite _database_code_amcsd 0018313 10.362 10.362 37.106 90 90 120 R3c atom x y z occ Biso Mg 0 0 0 .78 .49 Fe 0 0 0 .22 .49 Ca(IB) .2700 .1241 .1753 1.20 Ca(IIA) 0 0 .3141 .45 1.5 Ca(IIB1) .2725 .1308 .0681 .60 Ca(IIB2) .1261 .2830 .4359 .65 P(A) 0 0 .2348 .77 P(B1) .3125 .1744 .3658 .66 P(B2) .1821 .3222 .1358 .53 O(IA) 0 0 .1935 1.7 O(IB1) .2612 .1788 .3268 1.74 O(IB2) .1517 .2886 .1764 1.11 O(IIA) .1422 .1381 .2484 1.71 O(IIB1) .2417 .0145 .3798 1.52 O(IIB2) .2887 .2686 .1237 1.00 O(IIB3) .2764 .2772 .3885 .95 O(IIB4) .0322 .2453 .1161 1.29 O(IIB5) .0920 .1798 .0353 1.11 O(IIB6) .1761 .0994 .4622 .77