Details

Autor(en) / Beteiligte

• Seidel, Stefan
• Pöttgen, Rainer

Titel

Yb6Ir5Ga7 – A MgZn2 Superstructure

Ist Teil von

• Zeitschrift für anorganische und allgemeine Chemie (1950), 2017-02, Vol.643 (3), p.261-265

Ort / Verlag

Weinheim: Wiley Subscription Services, Inc

Erscheinungsjahr

2017

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The gallide Yb6Ir5Ga7 was synthesized by high‐frequency melting of the elements in a sealed niobium ampoule. The structure was refined from single‐crystal X‐ray diffractometer data: Nb6.4Ir4Al7.6 type, P63/mcm, a = 930.4(1), c = 843.0(1) pm, wR2 = 0.0597, 379 F2 values and 22 variables. Yb6Ir5Ga7 adopts a superstructure of the MgZn2 Laves phase by a complete ordering of the iridium and gallium atoms on the zinc substructure, i.e. the network consists of ordered and condensed Ir3Ga and IrGa3 tetrahedra with Ir–Ga distances ranging from 260 to 265 pm. The crystal chemical details and the underlying group‐subgroup scheme are discussed.