Hummerite
Hughes J M, Schindler M, Rakovan J F, Cureton F E
The Canadian Mineralogist 40 (2002) 1429-1435
The crystal structure of hummerite, K Mg(V5O14).8H2O:
Bonding between the [V10O28] structural units and the
{K2Mg2(H2O)16} interstitial complex
_database_code_amcsd 0005792
8.8178 10.7236 11.0707 65.789 74.057 71.853 P-1
atom      x      y      z   Uiso
V1   .67554 .50637 .51942 .01666
V2   .38822 .77792 .45258 .01881
V3   .35314 .54862 .73003 .01796
V4   .69385 .73938 .24167 .02152
V5   .63029 .27648 .79897 .02128
OV1   .2994 .89304 .52256  .0265
OV2   .2848 .83219 .31048  .0222
OV3   .5243 .64321 .59189  .0173
OV4   .7659 .40873 .65734  .0212
OV5   .7965 .61357 .41051  .0215
OV6  .51599 .59950 .37888  .0174
OV7   .2619 .66643 .79624  .0262
OV8   .2222 .42672 .80217  .0217
OV9   .5080 .43901 .83715  .0207
OV10  .5677 .84241 .34664  .0215
OV11  .4542 .19578 .87099  .0235
OV12  .8291  .8273  .1546 .03200
OV13  .7389 .36696 .43906  .0182
OV14  .7376  .1985  .9158  .0328
K    .32958 .90849 .78152 .03728
Mg   .78293 .73370 .78507 .02159
OI1   .9105  .5704  .7195  .0478
HI1A   .878   .526   .698   .039
HI1B   .992   .550   .731   .061
OI2   .6407  .8942  .8556  .0286
HI2A   .646   .963   .820   .050
HI2B   .623   .874   .932   .034
OI3   .0601 1.1546  .5971  .0529
HI3A  -.016  1.148   .622    .12
HI3B   .087  1.225   .583    .09
OI4   .0027  .9361  .8764  .0489
HI4A  -.020   .893   .945    .16
H14B   .001  1.004   .856    .23
OI5   .9203  .6579  .9340  .0326
HI5A   .896   .628  1.003   .057
HI5B  1.012   .652   .934   .087
OI6   .6492  .8212  .6308  .0306
HI6A   .622   .773   .608   .032
HI6B   .673   .866   .571   .074
OI7   .6060  .6259  .8963  .0333
HI7A   .592   .567   .874   .032
HI7B   .583   .606   .973   .040
OI8   .9457  .8538  .6639  .0422
HI8A  1.009   .857   .686    .10
HI8B   .954   .868   .599    .17