COL  ICSD Collection Code 203027
 DATE Recorded Dec 27, 1990
 NAME Calcium tris(phosphate) hydroxide
 MINR Hydroxylapatite - from Holly Springs, Georgia, USA
 FORM Ca5 (P O4)3 (O H)
      = H Ca5 O13 P3
 FORM (Ca4.9 Fe.01 Sr.01 Ce.02) (P2.96 Si.02 S.03) O12 (F.94 Cl.08)
 TITL Structural variations in natural F, OH, and Cl apatites
 REF  American Mineralogist
      AMMIA 74 (1989) 870-876
 AUT  Hughes J M, Cameron˙M, Crowley˙K˙D
 CELL a=9.417 b=9.417 c=6.874 à=90.0 á=90.0 ç=120.0
      V=527.9 Z=2
 SGR  P 63/m        (176) - hexagonal
 CLAS 6/m   (Hermann-Mauguin) - C6h (Schoenflies)
 PRS  hP44
 ANX  A3B5X13
 PARM Atom__No OxStat  Wyck -----X----- -----Y----- -----Z-----  -SOF-
      Ca     1  2.000    4f  2/3         1/3         0.00144(8)
      Ca     2  2.000    6h -0.00657(5)  0.24706(5)  1/4
      P      1  5.000    6h  0.36860(6)  0.39866(6)  1/4
      O      1 -2.000    6h  0.4850(2)   0.3289(2)   1/4
      O      2 -2.000    6h  0.4649(2)   0.5871(2)   1/4
      O      3 -2.000   12i  0.2580(1)   0.3435(1)   0.0703(2)
      O      4 -2.000    4e  0.          0.          0.1979(6)     0.5
      H      1  1.000    4e  0.          0.          0.04(2)       0.5
 WYCK i h4 f e
 ITF  H   1   B=3.3
˙
 TF   Atom   á(1,1)  á(2,2)  á(3,3)  á(1,2)  á(1,3)  á(2,3)
      Ca 1    0.0039  0.0041  0.0033  0.0041  0.0000  0.0000
                 (1)     (0)     (1)     (0)
      Ca 2    0.0031  0.0035  0.0042  0.0031  0.0000  0.0000
                 (0)     (0)     (1)     (1)
      P  1    0.0022  0.0025  0.0034  0.0025  0.0000  0.0000
                 (0)     (1)     (1)     (1)
      O  1    0.0036  0.0044  0.0059  0.0054  0.0000  0.0000
                 (2)     (2)     (3)     (2)
      O  2    0.0035  0.0031  0.0105  0.0032  0.0000  0.0000
                 (2)     (2)     (3)     (2)
      O  3    0.0050  0.0096  0.0070  0.0101 -0.0050 -0.0082
                 (1)     (1)     (2)     (2)     (3)     (3)
      O  4    0.0030  0.0030  0.0120  0.0030  0.0000  0.0000
                 (3)     (3)    (10)     (3)
 RVAL 0.016