title: Er5Ni3Al3Ge4: a quaternary variant of the NbCoB type.
abstract: Single crystals of pentaerbium trinickel trialuminium tetragermanium were synthesized from the elements by arc-melting. The novel compound crystallizes in the space group Pmmn, e6b2a, with all nine crystallographically unique atoms in special positions of site symmetries m.. and mm2. This compound represents a new ordered variant of the NbCoB type. Its two-layer structure is described as an intergrowth of the Er3NiAl3Ge2 (Y3NiAl3Ge2 type) and ErNiGe (TiNiSi type) structures. The coordination polyhedra are distorted pentagonal prisms around Er atoms, tetragonal prisms around Al and Ni atoms, and trigonal prisms around Ge and Ni atoms, capped with eight, four and three extra vertices, respectively.
authors: Department of Inorganic Chemistry, Ivan Franko National University of Lviv, Kyryla i Mefodiya St. 6, 79005 Lviv, Ukraine. demchenko@franko.lviv.ua
authors: Pavlo
authors: P
authors: Demchenko
authors: Joanna
authors: J
authors: Kończyk
authors: Grigorii
authors: G
authors: Demchenko
authors: Roman
authors: R
authors: Gladyshevskii
authors: Volodymyr
authors: V
authors: Pavlyuk