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Abstract:
The Sn-119 Mossbauer parameters for a range of Zintl phase compounds are
reported. The compounds containing tetrahedrally coordinated tin of
composition M(5)SnX(3) (M = Na, K; X = P, As, Sb) have chemical isomer
shifts close to that of grey-tin and can be considered to be covalently
bonded species. The layer structures of composition KSnX (X = As, Sb)
and double-layer compounds MSn(2)X(2) (M = Na, Sr; X = As, Sb) have tin
in a distorted octahedral environment. The chemical isomer shifts are
closer to that of white-tin and can be interpreted in terms of metallic
bonding. (C) 1995 Academic Press, Inc.
