Thiostannate
class of chemical compounds
Sulfidostannates, or thiostannates are chemical compounds containing anions composed of tin linked with sulfur. They can be considered as stannates with sulfur substituting for oxygen. Related compounds include the thiosilicates, and thiogermanates, and by varying the chalcogen: selenostannates, and tellurostannates. Oxothiostannates have oxygen in addition to sulfur. Thiostannates can be classed as chalcogenidometalates, thiometallates, chalcogenidotetrelates, thiotetrelates, and chalcogenidostannates. Tin is almost always in the +4 oxidation state in thiostannates, although a couple of mixed sulfides in the +2 state are known,
Some thiostannate minerals are known. In nature the tin can be partly replaced by arsenic, germanium, antimony or indium. Many thiostannate minerals contain copper, silver or lead. In the field of mineralogy, these compound can be termed sulfostannates or sulphostannates.
Different cluster anions are known: [SnS4]4–, [SnS3]2–, [Sn2S5]2–, [Sn2S6]4–, [Sn2S7]6–, [Sn2S8]2–, [Sn3S7]2–, [Sn4S9]2–, [Sn5S12]4–, or [Sn4S10]4–.
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