American Mineralogist Crystal Structure Database

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Gunterblassite
 
Rastvetaeva R K, Aksenov S M, Chukanov N V
 
Doklady Chemistry 442 (2012) 57-62
Crystal structure of gunterblassite, a new mineral with a triple tetrahedral layer
Locality: Rother Kopf mountain, Eifel volcanic field, Germany
Note: tetrahedral sites, Si8.83 Al3.06, but occupancies were not reported
_database_code_amcsd 0018694
6.538 6.975 37.26 90 90 90 Pnm2_1
atom    x    y      z occ Biso
K1   .072    0  .2279 .35  2.3
Ca1  .072    0  .2279 .25  2.3
K2   .101    0  .0469  .5  1.2
Ba2  .101    0  .0469  .3  1.2
K3   .229   .5  .4225 .35  3.2
Ca3  .229   .5  .4225 .25  3.2
Fe   .246   .5  .8685  .5  2.5
Ca   .246   .5  .8685  .2  2.5
Mg   .246   .5  .8685 .15  2.5
Na   .246   .5  .8685 .15  2.5
Si1  .384    0  .8211      1.6
Si2  .199 .218  .3163      1.7
Si3  .013    0  .7708      2.6
Si4  .429    0  .6388      1.1
Si5  .055    0  .6904      1.0
Si6  .207 .221  .1400      2.2
Si7  .028    0  .5774      1.2
Si8  .047    0  .4915      1.2
Si9  .210 .233  .9462      2.0
Si10 .437    0  .4463      1.2
O1   .453 .316   .142      1.7
O2   .240    0  .6060      5.4
O3   .090 .323  .1777      1.9
O4   .055    0  .7294      3.1
O5   .052 .310  .1050      2.2
O6   .225    0   .144      1.7
O7   .438 .311  .3228      2.7
O8   .260    0  .7830      1.6
O9   .128 .316  .9838      3.1
O10  .098 .289  .2823      1.3
O11  .071    0  .5337      3.8
O12  .263    0  .6696      4.2
O13  .255    0  .4762      1.7
O14  .181    0  .3231      3.0
O15  .073 .294 -.0904      4.3
O16  .450 .302 -.0593      1.7
O17  .245    0 -.0466      1.4
OH1  .251    0  .8570      2.0
OH2  .058 .258  .3550      3.4
OH3  .247    0  .4126      3.7
Wat1 .245   .5  .6207  .8  1.6
Wat2 .299   .5   .798  .8  1.7
Wat3  .21   .5   .495  .8  1.4
Wat4 .351   .5   .697  .6  4.2
Wat5 .448 .259  .0450  .8  2.1
Wat6 .446 .261  .2281  .6  2.8
Wat7 .443 .198  .3779  .6  5.7
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