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Fermorite |
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Hughes J M, Drexler J W |
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Neues Jahrbuch fur Mineralogie, Monatshefte 1991 (1991) 327-336 |
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Cation substitution in the apatite tetrahedral site: |
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crystal structures of type hydroxylellestadtite and type fermorite |
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Locality: Sitipar deposit, India |
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_database_code_amcsd 0014858 |
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9.5935 9.5966 6.9754 90 90 119.971 P2_1/m |
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atom x y z occ Biso |
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Ca1 .33340 .66663 .0016 .84 1.05 |
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Sr1 .33340 .66663 .0016 .16 1.05 |
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Ca2a .00702 .25046 .25 .84 1.04 |
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Sr2a .00702 .25046 .25 .16 1.04 |
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Ca2b .74963 .75684 .25 .84 1.01 |
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Sr2b .74963 .75684 .25 .16 1.01 |
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Ca2c .24318 .99288 .25 .84 1.02 |
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Sr2c .24318 .99288 .25 .16 1.02 |
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As5+1 .63019 .02816 .25 .49 .65 |
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P1 .63019 .02816 .25 .48 .65 |
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As5+2 .97194 .60212 .25 .49 .66 |
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P2 .97194 .60212 .25 .48 .66 |
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As5+3 .39803 .36981 .25 .49 .65 |
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P3 .39803 .36981 .25 .48 .65 |
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O1a .3261 .4883 .25 1.57 |
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O1b .5120 .8377 .25 1.64 |
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O1c .1625 .6747 .25 1.68 |
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O2a .5921 .4671 .25 1.90 |
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O2b .5329 .1250 .25 1.84 |
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O2c .8750 .4074 .25 1.96 |
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O3a .3432 .2558 .0667 2.43 |
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O3b .7446 .0879 .0664 2.37 |
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O3c -.0875 .6571 .0665 2.40 |
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OH -.0018 -.0001 .191 .655 2.3 |
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F .002 .000 .25 .345 2.0 |
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