Piergorite-(Ce)
Boiocchi M, Callegari A, Ottolini L
American Mineralogist 91 (2006) 1170-1177
The crystal structure of piergorite-(Ce),
Ca8Ce2(Al0.5Fe3+0.5)Sum1(X,Li,Be)2Si6B8O36(OH,F)2:
A new borosilicate from Vetralla, Italy,
with a modified hellandite-type chain
Locality: Vetralla, Italy
_database_code_amcsd 0004179
28.097 4.777 10.236 90 96.81 90 P2/a
atom       x      y      z occ  Uiso
CaM3A  .1601 -.0088 -.1185 .98 .0080
CeM3A  .1601 -.0088 -.1185 .02 .0080
CaM3B  .1580 -.0067 -.4445 .99 .0085
CeM3B  .1580 -.0067 -.4445 .01 .0085
CaM4A  .1009  .0342  .2068 .99 .0089
CeM4A  .1009  .0342  .2068 .01 .0089
CaM4B  .2188  .0092  .2401 .95 .0071
CeM4B  .2188  .0092  .2401 .05 .0071
CeM2   .0271 -.0207 -.3248 .46 .0059
CaM2   .0271 -.0207 -.3248 .39 .0059
ThM2   .0271 -.0207 -.3248 .15 .0059
AlM1       0      0      0 .49 .0072
Fe3+M1     0      0      0 .35 .0072
TiM1       0      0      0 .16 .0072
BeT    .0242  .4590  .1671 .27 .0046
LiT    .0242  .4590  .1671 .15 .0046
Si1A   .0720 -.4999 -.0636     .0065
Si1B     .25 -.4967     .5     .0060
Si2A     .25  .4846      0     .0067
Si2B   .0668 -.4797  .4400     .0057
B1A    .2055  .4633 -.2688     .0127
B1B    .1090  .4683 -.3024     .0075
B2A    .1594 -.4597  .3516     .0041
B2B    .1610 -.4667  .0887     .0046
O1     .2052 -.3206  .0369     .0067
O2     .2307  .3055 -.1330     .0148
O3     .2041 -.3107  .4348     .0079
O4     .2310  .3149 -.3803     .0088
O5     .0289 -.2418  .4686     .0093
O6     .0832  .3313 -.4256     .0080
O7     .1159 -.3214  .4018     .0069
O8     .0464  .3115  .3220     .0144
O9     .0329 -.2605 -.1112     .0181
O10    .0846  .3239 -.1923     .0104
O11    .0537  .2708  .0361     .0172
O12    .1188 -.3308  .0040     .0080
O13    .1614  .2406  .0812     .0066
O14    .1601  .2481  .3618     .0062
O15    .1066 -.2380 -.2998     .0075
O16    .1594 -.3405  .2195     .0063
O17    .2099 -.2457 -.2658     .0072
O18    .1575  .3437 -.2852     .0068
OH19   .0241 -.1944  .1615 .88 .0095
F19    .0241 -.1944  .1615 .12 .0095