Nagashima M, Akasaka M
American Mineralogist 89 (2004) 1119-1129
An X-ray Rietveld study of piemontite on the join
Ca2Al3Si3O12(OH) - Ca2Mn3+3Si3O12(OH) formed by hydrothermal synthesis
Sample: q = 1.75, p = 1.25, Synthesis at P=350 MPa, T=500 C
_database_code_amcsd 0003596
8.8581 5.6949 10.1771 90 115.518 90 P2_1/m
atom x y z occ
Ca1 .757 3/4 .154
Ca2 .594 3/4 .422
AlM1 0 0 0 .73
MnM1 0 0 0 .27
AlM2 0 0 1/2 .97
MnM2 0 0 1/2 .03
AlM3 .300 .25 .222 .05
MnM3 .300 .25 .222 .95
Si1 .335 3/4 .043
Si2 .686 .25 .271
Si3 .181 3/4 .322
O1 .241 .985 .030
O2 .311 .981 .353
O3 .802 .015 .337
O4 .068 .25 .133
O5 .039 3/4 .150
O6 .078 3/4 .424
O7 .521 3/4 .184
O8 .531 .25 .310
O9 .607 .25 .085
OH10 .085 .25 .421
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