1984
DOI: 10.1524/zkri.1984.166.14.283
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Ungewöhnliche lineare, oligomere Anionen [GanSe2n+2](n + 4)- (n =2,4,6) in festen Selenogallaten des Cäsiums

Abstract: The crystal structures of the ternary selenogallates Cs 6 Ga 2 Se 6 , Cs 8 Ga 4 Se 10 , €8x003686,4 and CsGaSe 2 -I are characterized by the existence of linear oligimeric and polymeric anions [Ga n Se 2n+2 ] (,I+4)_ (« = 2,4,6, oo). These anions consist of edge sharing GaSe 4 -tetrahedra and show systematic geometrical variations of distances and angles which correlate with the degree of oligomerisation. In connection with the geometrical variations remarkable space filling changes are observed. Preliminary t… Show more

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Cited by 3 publications
(5 citation statements)
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“…Both distances and angles are in good agreement with comparable compounds. , The bond lengths differ slightly from the sum of the ionic radii, d (Ga 3+ –Se 2– ) ∼ 2.5 Å. Four GaSe 4 tetrahedra share common corners to build Ga 4 Se 10 supertetrahedra.…”
Section: Resultssupporting
confidence: 64%
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“…Both distances and angles are in good agreement with comparable compounds. , The bond lengths differ slightly from the sum of the ionic radii, d (Ga 3+ –Se 2– ) ∼ 2.5 Å. Four GaSe 4 tetrahedra share common corners to build Ga 4 Se 10 supertetrahedra.…”
Section: Resultssupporting
confidence: 64%
“…The angles ∠(Se–Ga–Se) range from 100.48(1)° to 115.67(2)°. Both distances and angles are in good agreement with comparable compounds. , The bond lengths are slightly smaller than the sum of the ionic radii d (Ga 3+ –Se 2– ) ∼ 2.5 Å. Each GaSe 4 tetrahedron is connected to two adjacent tetrahedra by common edges, resulting in an infinite anionic chain ∞ 1 [GaSe 2 – ] running along [001].…”
Section: Resultssupporting
confidence: 59%
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“…Each Ga atom is 4-fold-coordinated in a distorted tetrahedral sphere with the Ga–Se distance varying from 2.367(2) to 2.448(2) Å (Figure b). These distances are consistent with those of 2.349–2.528 Å in Cs 8 Ga 4 Se 10 , 2.363–2.451 Å in BaGa 4 Se 7 , and 2.386–2.411 Å in Ba 3 CsGa 5 Se 10 Cl 2 …”
mentioning
confidence: 99%
“…The crystal structures of CsGaSe 3 , Cs 2 Ga 2 Se 5 , and CsGaSe 2 - mC 16 , feature polymeric, anionic chalcogenogallate chains ∞ 1 [Ga 2 ( Q 2 ) 2– x Q 2+ x 2– ] ( Q = S, Se; x = 0, 1, 2) like the analogous sulfides, see Figure . CsGaSe 2 crystallizes in two polymorphic modifications with CsGaSe 2 - mC 16 being the high-temperature polymorph and CsGaSe 2 - mC 64 being the low-temperature polymorph .…”
Section: Resultsmentioning
confidence: 99%