Barium Stannate, 2BaO.SnO₂.10H₂O

Barium Stannate, 2BaO.SnO₂.10H₂O, is obtained in the form of brilliant pearly leaflets by the action of a solution of potassium stannate on a saturated solution of a barium salt or of barium hydroxide. Like the calcium and strontium compounds, it is insoluble in water but dissolves in cold hydrochloric or nitric acid, forming a clear solution which gelatinises on heating.

Both a chlorostannite, BaSnCl₄.4H₂O, and a chlorostannate, BaSnCl₆.5H₂O, are known, and also a fluorstannate, BaSnF₆.3H₂O, and a thiostannate, BaSnS₃.8H₂O.