K2Sn4Se8 - ein gemischtvalentes Selenostannat

Kurt O. Klepp

K2Sn4Se8 - ein gemischtvalentes Selenostannat

Kurt O. Klepp

Institut für Anorganische Chemie

Publikation: Beitrag in Fachzeitschrift › Artikel › Begutachtung

Abstract

Transparent, ruby red crystals of the new compound K2Sn4Se8 were obtained from K2Se, Sn and Se by high temperature synthesis. K2Sn4Se8 is monoclinic, space-group Cm with a=6.436(3)Ä, b=18.934(9)Ä, c=7.417(5)Ä, beta=96.26(2)?; Z=2. The crystal structure was refined to a conventional R of 0.022 (Rw=0.018). In K2Sn4Se8 the tin atoms have two distinct oxidation states +2 and +4. Sn(IV) is tetrahedrally coordinated by Se, Sn(II) has a pseudo-trigonal bipyramidal coordination MA4E which reveals a pronounced stereo-activity of the lone pair of electrons. In the crystal structure the Sn(IV)Se4-tetrahedra share common apices, yielding open sheets which are separated from each other by the alkali cations, but connected via the Sn(II) centers.

Titel in Übersetzung	K2Sn4Se8 - A Mixed-Valent Selenostannate
Originalsprache	Deutsch (Österreich)
Seitenumfang	5
Fachzeitschrift	Zeitschrift für Naturforschung B: A Journal of Chemical Sciences
Publikationsstatus	Veröffentlicht - Juli 1991

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Dieses zitieren

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title = "K2Sn4Se8 - ein gemischtvalentes Selenostannat",

abstract = "Transparent, ruby red crystals of the new compound K2Sn4Se8 were obtained from K2Se, Sn and Se by high temperature synthesis. K2Sn4Se8 is monoclinic, space-group Cm with a=6.436(3){\"A}, b=18.934(9){\"A}, c=7.417(5){\"A}, beta=96.26(2)?; Z=2. The crystal structure was refined to a conventional R of 0.022 (Rw=0.018). In K2Sn4Se8 the tin atoms have two distinct oxidation states +2 and +4. Sn(IV) is tetrahedrally coordinated by Se, Sn(II) has a pseudo-trigonal bipyramidal coordination MA4E which reveals a pronounced stereo-activity of the lone pair of electrons. In the crystal structure the Sn(IV)Se4-tetrahedra share common apices, yielding open sheets which are separated from each other by the alkali cations, but connected via the Sn(II) centers.",

author = "Klepp, \{Kurt O.\}",

year = "1991",

month = jul,

language = "Deutsch ({\"O}sterreich)",

journal = "Zeitschrift f{\"u}r Naturforschung B: A Journal of Chemical Sciences",

issn = "0932-0776",

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TY - JOUR

T1 - K2Sn4Se8 - ein gemischtvalentes Selenostannat

AU - Klepp, Kurt O.

PY - 1991/7

Y1 - 1991/7

N2 - Transparent, ruby red crystals of the new compound K2Sn4Se8 were obtained from K2Se, Sn and Se by high temperature synthesis. K2Sn4Se8 is monoclinic, space-group Cm with a=6.436(3)Ä, b=18.934(9)Ä, c=7.417(5)Ä, beta=96.26(2)?; Z=2. The crystal structure was refined to a conventional R of 0.022 (Rw=0.018). In K2Sn4Se8 the tin atoms have two distinct oxidation states +2 and +4. Sn(IV) is tetrahedrally coordinated by Se, Sn(II) has a pseudo-trigonal bipyramidal coordination MA4E which reveals a pronounced stereo-activity of the lone pair of electrons. In the crystal structure the Sn(IV)Se4-tetrahedra share common apices, yielding open sheets which are separated from each other by the alkali cations, but connected via the Sn(II) centers.

AB - Transparent, ruby red crystals of the new compound K2Sn4Se8 were obtained from K2Se, Sn and Se by high temperature synthesis. K2Sn4Se8 is monoclinic, space-group Cm with a=6.436(3)Ä, b=18.934(9)Ä, c=7.417(5)Ä, beta=96.26(2)?; Z=2. The crystal structure was refined to a conventional R of 0.022 (Rw=0.018). In K2Sn4Se8 the tin atoms have two distinct oxidation states +2 and +4. Sn(IV) is tetrahedrally coordinated by Se, Sn(II) has a pseudo-trigonal bipyramidal coordination MA4E which reveals a pronounced stereo-activity of the lone pair of electrons. In the crystal structure the Sn(IV)Se4-tetrahedra share common apices, yielding open sheets which are separated from each other by the alkali cations, but connected via the Sn(II) centers.

M3 - Artikel

SN - 0932-0776

JO - Zeitschrift für Naturforschung B: A Journal of Chemical Sciences

JF - Zeitschrift für Naturforschung B: A Journal of Chemical Sciences

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