Chlorapatite Fleet M E, Liu X, Pan Y American Mineralogist 85 (2000) 1437-1446 Rare-earth elements in chlorapatite [Ca10(PO4)6(Cl)2]: Uptake, site preference, and degradation of monoclinic structure Sample: La-ClAp _database_code_amcsd 0002519 9.6501 19.3002 6.7724 90 90 120. P2_1/b atom x y z occ Biso Ca1 .3227 .58037 .0037 .963 .42 Na1 .3227 .58037 .0037 .025 .42 La1 .3227 .58037 .0037 .0126 .42 Ca1p .3449 .5865 .4968 .963 1.68 Na1p .3449 .5865 .4968 .025 1.68 La1p .3449 .5865 .4968 .0126 1.68 Ca2a .25884 .25185 .2484 .991 1.11 La2a .25884 .25185 .2484 .0089 1.11 Ca2b .00426 .62268 .7481 .991 1.23 La2b .00426 .62268 .7481 .0089 1.23 Ca2c .25546 .37953 .7501 .991 1.159 La2c .25546 .37953 .7501 .0089 1.159 P(a) .40750 .43754 .2555 .94 P(b) .62463 .26654 .2531 .97 P(c) .03239 .45376 .7535 .98 O1a .3436 .49575 .248 1.37 O1b .4920 .32379 .756 1.33 O1c .1481 .57837 .257 1.40 O2a .5921 .48276 .2354 1.17 O2b .5341 .31366 .241 1.18 O2c .1268 .54621 .7332 1.15 O3a .3363 .3796 .0796 1.25 O3b .7399 .2901 .0755 1.36 O3c .0792 .4180 .5784 1.36 O3ap .3696 .3876 .4442 1.06 O3bp .7260 .2968 .4407 .98 O3cp .0925 .4350 .9429 .99 Cl .0017 .24930 .4451 1.58