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1	Author	Ursula Frank-Cordier, Gerhard Cordier, Herbert Schäfer	Requires cookie*
	Title	Die Struktur des Na7Ga13-I und ein Konzept zur bindungsmäßigen Deutung The Structure of NavGai3-I and its Characterization by a Bonding Scheme
	Abstract	The new compound NayGa^-I crystallizes in the trigonal-rhombohedral system, space group R 3 m, with the constants a = 1496.5(3) pm, c = 3893(1) pm, c/o = 2.60. The Ga atoms form Gai2 icosahedra and Gais clusters, connected to a threedimensional net. The arrangement of these clusters is related to the MgCu2 structure. The Na content of this compound correlates with the number of electrons necessary for a stable electron configuration in the Ga partial structure. The BaAl4 type structure of NaGa4 has been confirmed by single crystal data.
	Reference	(Z. Naturforsch. 37b, 119—126 [1982]; eingegangen am 5. Oktober 1981)
	Published	1982
	Keywords	Natrium Gallides, Crystal Structure, Bonding Scheme
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	TEI-XML for	default:Reihe_B/37/ZNB-1982-37b-0119.pdf
	Identifier	ZNB-1982-37b-0119
	Volume	37

2	Author	Ursula Frank-Cordier, Gerhard Cordier, Herbert Schäfer	Requires cookie*
	Title	Neue Ga-Cluster-Verbände im Na7Ga13-II New Ga-Cluster Compounds: The Structure of Na7Gai3-II
	Abstract	Na7Gai3-II crystallizes in the orthorhombic system, space group Pnma with the con-stants a -1562.5(3) pm, b = 1497.9(3) pm, c = 2167.8(4) pm. The Ga-atoms form Gaj.2 icosahedra and Gais clusters connected to a threedimensional network. The centres of these clusters correspond to the atomic positions of the MgCu2 structure. The number of bonding electrons is related to the Na content of the compound.
	Reference	(Z. Naturforsch. 37b, 127—135 [1982]; eingegangen am 5. Oktober 1981)
	Published	1982
	Keywords	Natrium Gallides, Crystal Structure, Bonding Scheme
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	TEI-XML for	default:Reihe_B/37/ZNB-1982-37b-0127.pdf
	Identifier	ZNB-1982-37b-0127
	Volume	37