McKie D, Frankis E J
Zeitschrift fur Kristallographie 145 (1977) 73-95
Nyerereite: A new volcanic carbonate mineral from Oldoinyo Lengai, Tanzania
Note: low-temperature polymorph that inverted from the high-temperature polymorph
Note: only half of the O atoms have been located
Locality: Oldoinyo Lengai, Tanzania
5.044 8.809 12.743 90 90 90 Cmc2_1
atom x y z occ
Ca 0 .98 0
Na1 0 .32 .82 .64
K1 0 .32 .82 .36
Na2 0 .32 .12
C1 0 .35 .51
C2 0 .99 .23
O1 .22 .28 .52
O2 0 .49 .49
Note: high-temperature polymorph with an structure that has been inferred
5.05 5.05 12.85 90 90 120 P6_3mc
Ca 0 0 0
Na 1/3 2/3 .825 .64
K 1/3 2/3 .825 .36
Na 1/3 2/3 .125
C 1/3 2/3 .5
C 0 0 .25
O .48 .52 .5
O .15 .85 .25
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Total number of retrieved datasets: 2 View in amc, download in amc
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