Na2Zn2[TeO3]3[H2O]3
(176) P63/m – i4h3f
hP70
Na2Zn2(TeO3)3·3H2O [1], zemannite family
Structural features: Units of two face-linked ZnO6 octahedra share vertices with :TeO3 ψ-tetrahedra to
form a 3D-framework; Na and H2O in channels parallel to [001] (high degree of disorder).
Miletich R. (1995) [1]
H5.94Na1.98O11.97Te3Zn2
a = 0.9395, c = 0.7733 nm, c/a = 0.823, V = 0.5911 nm3, Z = 2
site
Wyck. sym.
x
y
z
occ.
atomic environment
__________________________________________________________________________________________________________________________________________________________________________
Na1
(OH2)2
(OH2)3
O4
(OH2)5
O6
Te7
Zn8
12i
12i
12i
12i
6h
6h
6h
4f
1
1
1
1
m..
m..
m..
3..
0.081
0.117
0.186
0.4787
0.123
0.1607
0.52981
1
/3
0.249
0.188
0.097
0.1414
0.19
0.4901
0.04038
2
/3
0.035
0.045
0.182
0.071
1
/4
1
/4
1
/4
0.0621
0.33
0.13
0.17
0.39
single atom (OH2)
non-colinear TeZn
non-colinear (OH2)2
single atom Te
non-coplanar triangle O3
octahedron O6
__________________________________________________________________________________________________________________________________________________________________________
Experimental: single crystal, diffractometer, X-rays, R = 0.026
Remarks: Short interatomic distances for partly occupied site(s). Hydrogen atoms are not taken into
consideration for Pearson symbol, Wyckoff sequence and atomic environments.
References: [1] Miletich R. (1995), Monatsh. Chem. 126, 417-430.
Landolt-Börnstein
New Series III/43A4