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Four clathrates with type-I and type-II structure are reported in the K-Ba-Ga-Sn system. For the type-I compound, all framework sites are occupied by a mixture of Ga and Sn atoms, with Ga showing a preference for Wyckoff site 6c. For the type-II structures, only the smaller (Ga,Sn)24 penta­gonal dodeca­hedral cages are filled, while the (Ga,Sn)28 hexa­kai­deca­hedral cages remain empty.
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