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