Rb3Sb7.11Se3O9([OH]0.16[H2O]0.84)2.07
(176) P63/m – ih6fb
hP54
Rb6[Sb12O18](SbSe3)2Sb0.22(OH)0.66(H2O)3.48 [1]
Structural features: :SbO3 ψ-tetrahedra share vertices to form infinite tubes with Sb6O6 rings parallel to
[001]; single :SbSe3 ψ-tetrahedra (orientational disorder up-down) between the tubes, Rb and (OH2,OH)
in the tubes.
Wang X. (1995) [1]
H3.81O11.07Rb3Sb7.11Se3
a = 1.4715, c = 0.5653 nm, c/a = 0.384, V = 1.0601 nm3, Z = 2
site
Wyck. sym.
x
y
z
occ.
atomic environment
__________________________________________________________________________________________________________________________________________________________________________
O1
M2
Rb3
O4
Se5
Sb6
Sb7
Sb8
Sb9
12i
6h
6h
6h
6h
6h
6h
4f
2b
1
m..
m..
m..
m..
m..
m..
3..
-3..
0.0598
0.142
0.1696
0.35
0.3675
0.40019
0.44132
1
/3
0
0.3545 0.001
1
0.052
/4
0.2657 1/4
0.1255 1/4
0.5298 1/4
0.01982 1/4
0.28122 1/4
2
/3
0.0966
0
0
0.69
0.5
0.11
non-colinear Sb2
non-colinear Sb2
10-vertex polyhedron O6(OH2)4
non-colinear Sb2
non-colinear Sb2
non-coplanar triangle O3
non-coplanar triangle O3
single atom Sb
octahedron (OH2)6
__________________________________________________________________________________________________________________________________________________________________________
M2 = 0.84OH2 + 0.16OH
Transformation from published data: origin shift 0 0 1/2
Experimental: single crystal, diffractometer, X-rays, R = 0.069, T = 293 K
Remarks: We assigned an approximate value to the OH/OH2 ratio of site M2 based on the nominal
composition. Short interatomic distances for partly occupied site(s). Hydrogen atoms are not taken into
consideration for Pearson symbol, Wyckoff sequence and atomic environments. Contrary to reports on
similar compounds, no superstructure reflections were observed.
References: [1] Wang X. (1995), Z. Kristallogr. 210, 693-694.
Landolt-Börnstein
New Series III/43A4