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American Mineralogist Crystal Structure Database

1 matching records for this search.

Potassic-arfvedsonite
  
Pekov I V, Chukanov N V, Lebedeva Y S, Pushcharovsky D Y, Ferraris G, Gula A,
Zadov A E, Novakova  A A, Petersen O V
  
Neues Jahrbuch fur Mineralogie, Monatshefte 2004 (2004) 555-574
Potassicarfvedsonite, KNa2Fe2+4Fe3+Si8O22(OH)2,a K-dominant amphibole of the
arfvedsonite series from agpaitic pegmatites - Mineral data, structure
refinement and disorder in the A site
Locality: Ilimaussaq, Greenland
_database_code_amcsd 0014932
10.002 18.054 5.319 90 103.90 90 C2/m
atom        x      y      z  occ   Uiso
KA'm     .013     .5   .039 .342   .038
NaA"m    .067     .5   .121 .054   .021
NaA2        0   .472      0 .054   .034
Fe2+M1      0 .09102     .5  .70 .00873
Fe3+M1      0 .09102     .5  .20 .00873
MnM1        0 .09102     .5  .10 .00873
Fe2+M2      0 .18388      0  .58 .00721
Fe3+M2      0 .18388      0  .39 .00721
Ti4+M2      0 .18388      0  .03 .00721
Fe2+M3      0      0      0  .63 .00782
LiM3        0      0      0  .28 .00782
Fe3+M3      0      0      0  .09 .00782
NaM4        0 .27795     .5	  .0165
Si1    .27470 .08610 .29088	 .00669
Si2    .28655 .17085 .79998	 .00683
O1     .10992 .09152  .2078	  .0096
O2     .12016 .17285  .7336	  .0102
O3      .1084      0  .7081   .8  .0124
F3      .1084      0  .7081   .2  .0124
O4      .3643 .24753  .7991	  .0130
O5     .34497 .12684  .0802	  .0107
O6      .3374 .11819  .5814	  .0115
O7      .3271      0  .2968	  .0131
H        .223      0   .771   .8    .07


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