A single-crystal X-ray investigation of potassium hydroxostannate(IV) K2Sn(
OH)(6) showed rhombohedral space group R.(3) over bar with a = 6.545(1) Ang
strom and c = 12.808(3) Angstrom. The Sn atom is surrounded by a slightly d
istorted octahedral array of six Q atoms with Sn-O 2.068(1) Angstrom. [Sn(O
H)(6)](2-) complex anions at e linked by O-H . . .O hydrogen bonds 2.894(2)
Angstrom long. An X-ray diffraction powder pattern was indexed. IR absorpt
ion bands were assigned. Thermolysis of the hydroxostannate proceeds in thr
ee stages at 235, 362, and 495 degreesC to split 2, 1/3, and 2/3 water mole
cules, respectively.