COL  ICSD Collection Code 22016
 DATE Recorded Aug 6, 1986; updated Mar 25, 1987
 NAME Sodium alumosilicate hydrate *
 MINR Natrolite - from Bergen Hill, New Jersey
 MINR Zeolite
 FORM Na2 Al2 Si3 O10 (H2 O)2
      = H4 Al2 Na2 O12 Si3
 TITL High temperature, single-crystal X-Ray study of natrolite
 REF  American Mineralogist
      AMMIA 58 (1973) 676-680
 AUT  Peacor D R
 CELL a=18.430 b=18.710 c=6.520 à=90.0 á=90.0 ç=90.0
      V=2248.3 Z=8
 SGR  F d d 2       (43) - orthorhombic
 CLAS mm2   (Hermann-Mauguin) - C2v (Schoenflies)
 PRS  oF184
 ANX  A2B2C3X12
 PARM Atom__No OxStat  Wyck -----X----- -----Y----- -----Z-----  -SOF-
      Si     1  4.000    8a  0.          0.          0.
      Si     2  4.000   16b  0.15327(3)  0.21139(3)  0.62286(24)
      Al     1  3.000   16b  0.03740(3)  0.09368(3)  0.61540(26)
      O      1 -2.000   16b  0.0228(1)   0.0683(1)   0.8654(5)
      O      2 -2.000   16b  0.0702(1)   0.1818(1)   0.6094(4)
      O      3 -2.000   16b  0.0983(1)   0.0351(1)   0.5005(5)
      O      4 -2.000   16b  0.2064(1)   0.1529(1)   0.7255(5)
      O      5 -2.000   16b  0.1805(1)   0.2275(1)   0.3900(5)
      Na     1  1.000   16b  0.2207(1)   0.0308(1)   0.6176(3)
      OH2    6 -2.000   16b  0.0563(1)   0.1894(1)   0.1109(6)
      H      1  1.000   16b 32 Atoms not located in Unit Cell
 WYCK b9 a
 ITF  Si  1   B=0.52
 ITF  Si  2   B=0.48
 ITF  Al  1   B=0.49
 ITF  O   1   B=1.09
 ITF  O   2   B=0.65
 ITF  O   3   B=1.03
 ITF  O   4   B=1.02
 ITF  O   5   B=1.06
 ITF  Na  1   B=1.34
 ITF  O   6   B=1.81
 REM  TEM 298
 RVAL 0.021