COL  ICSD Collection Code 59310
 DATE Recorded Jan 19, 1999
 NAME Magnesium bis(hydrogenselenate(IV))
 FORM Mg (H Se O3)2
      = H2 Mg O6 Se2
 TITL A new acid selenite: Mg (H Se O3)2
 REF  Acta Crystallographica C (39,1983-)
      ACSCE 53 (1997) 666-668
 AUT  Boldt K, EngelenÿB, UnterderweideÿK
 CELL a=9.091(1) b=5.231(1) c=5.570(1) à=90.0 á=90.9(0) ç=90.0
      V=264.8 Z=2
 SGR  P 1 21/n 1    (14) - monoclinic
 CLAS 2/m   (Hermann-Mauguin) - C2h (Schoenflies)
 PRS  mP22
 ANX  AB2X6
 PARM Atom__No OxStat  Wyck -----X----- -----Y----- -----Z-----  -SOF-
      Mg     1  2.000    2a  0.          0.          0.
      Se     1  4.000    4e  0.16547(2)  0.18155(3)  0.49075(3)
      O      1 -2.000    4e  0.28165(13) 0.4209(3)   0.4595(3)
      O      2 -2.000    4e  0.03231(13) 0.2497(3)   0.2852(2)
      O      3 -2.000    4e  0.06773(15) 0.2828(2)   0.7501(2)
      H      1  1.000    4e  0.038(4)    0.425(7)    0.725(6)
 WYCK e4 a
 ITF  H   1   U=0.041(9)
ÿ
 TF   Atom   U(1,1)  U(2,2)  U(3,3)  U(1,2)  U(1,3)  U(2,3)
      Mg 1    0.0121  0.0156  0.0115  0.0008  0.0002 -0.0009
                 (3)     (3)     (3)     (2)     (2)     (2)
      Se 1    0.0120  0.0151  0.0137 -0.0002  0.0002  0.0007
                 (0)     (1)     (1)     (0)     (0)     (0)
      O  1    0.0138  0.0271  0.0264 -0.0076 -0.0005  0.0029
                 (4)     (6)     (6)     (4)     (4)     (5)
      O  2    0.0164  0.0185  0.0156  0.0025 -0.0034 -0.0036
                 (4)     (4)     (4)     (4)     (3)     (4)
      O  3    0.0256  0.0174  0.0134  0.0024  0.0050  0.0016
                 (5)     (5)     (4)     (4)     (4)     (4)
 RVAL 0.037