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 = 1.1, p = 1.03, Synthesis at P=350 MPa, T=500 C
_database_code_amcsd 0003592
8.860 5.6818 10.167 90 115.511 90 P2_1/m
atom x y z occ
Ca1 .757 3/4 .152
Ca2 .598 3/4 .424
AlM1 0 0 0 .81
MnM1 0 0 0 .19
AlM2 0 0 1/2 .99
MnM2 0 0 1/2 .01
AlM3 .299 .25 .222 .17
MnM3 .299 .25 .222 .83
Si1 .334 3/4 .042
Si2 .686 .25 .274
Si3 .188 3/4 .320
O1 .238 .986 .031
O2 .310 .981 .358
O3 .792 .022 .335
O4 .063 .25 .131
O5 .046 3/4 .151
O6 .070 3/4 .411
O7 .511 3/4 .182
O8 .523 .25 .306
O9 .610 .25 .090
OH10 .086 .25 .420
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