Keystoneite
Missen O P, Back M E, Mills S J, Roberts A C, LePage Y, Pinch W W, Mandarino J A
The Canadian Mineralogist 59 (2021) 355-364
Crystal chemistry of zemannite-type structures: III. Keystoneite,
the Ni2+-analogue of zemannite, and ferrotellurite discredited
Locality: Keystone mine, Boulder County, Colorado, USA
_database_code_amcsd 0020974
9.3667 9.3667 7.6173 90 90 120 P6_3
atom        x      y     z occ  Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
Te     .45864 .50074 .4281     .0301  .0342  .0344  .0227  .0181  .0033  .0054
NiM1      2/3    1/3 .6121 .90 .0203   .024   .024   .012  .0122      0      0
MgM1      2/3    1/3 .6121 .10 .0203   .024   .024   .012  .0122      0      0
Fe3+M2    2/3    1/3 .2445 .47 .0286   .034   .034   .017  .0171      0      0
NiM2      2/3    1/3 .2445 .32 .0286   .034   .034   .017  .0171      0      0
Mn3+M2    2/3    1/3 .2445 .10 .0286   .034   .034   .017  .0171      0      0
MgM2      2/3    1/3 .2445 .10 .0286   .034   .034   .017  .0171      0      0
O1      .6609  .4990  .425      .029   .033   .035   .020   .017   .012   .014
O2       .143   .488  .609      .041   .047   .056   .027   .031  -.020   .008
O3       .857   .519 -.252      .035   .038   .021   .030   .004   .007  -.017
MgM3        0      0  .502 .59  .036   .027   .027   .056   .013      0      0
NiM3        0      0  .502 .03  .036   .027   .027   .056   .013      0      0
Wat1     .866   .808  .338 .73  .055
Wat2     .860   .802  .177 .54  .041