title: Structural and Thermodynamic Stability of the "1111" Structure Type: A Case Study of the EuFZnPn Series.
abstract: Two new compounds with the LaOAgS structure, EuFZnAs (1) and EuFZnSb (2), were obtained via solid state reaction. Both compounds are tetragonal (P4/nmm) with the cell parameters a = 4.1000(1) Å and c = 9.0811(1) Å for 1 and a = 4.2852(1)Å and c = 9.4238(1)Å for 2. The absence of their phosphide analog can be explained based on crystal chemical considerations as well as on quantum-chemical estimates of their thermodynamic stability with respect to EuF2and EuZn2Pn2. The magnetic response of 1 and 2 is ascribed to the presence of Eu2+ions. Both compounds are paramagnetic down to low temperatures, where they order antiferromagnetically at ∼5 K and ∼3 K, respectively. They are narrow-gap semiconductors, and EuFZnSb demonstrates a relatively high value of the Seebeck coefficient.
authors.affiliation: Department of Chemistry, Lomonosov Moscow State University , 119991 Moscow, Russia.
authors.forename: Igor V
authors.initials: IV
authors.lastname: Plokhikh
authors.affiliation: Department of Chemistry, Lomonosov Moscow State University , 119991 Moscow, Russia.
authors.forename: Dmitri O
authors.initials: DO
authors.lastname: Charkin
authors.affiliation: Department of Chemistry, Lomonosov Moscow State University , 119991 Moscow, Russia.|National Institute of Chemical Physics and Biophysics , 12618 Tallinn, Estonia.
authors.forename: Valeriy Yu
authors.initials: VY
authors.lastname: Verchenko
authors.affiliation: Department of Chemistry, Lomonosov Moscow State University , 119991 Moscow, Russia.|N.S. Kurnakov Institute of General and Inorganic Chemistry RAS , 119991 Moscow, Russia.
authors.forename: Alexey N
authors.initials: AN
authors.lastname: Kuznetsov
authors.affiliation: Department of Chemistry, Lomonosov Moscow State University , 119991 Moscow, Russia.
authors.forename: Sergey M
authors.initials: SM
authors.lastname: Kazakov
authors.affiliation: Experimental Physics VI, Center for Correlations and Magnetism, Institute of Physics, University of Augsburg , 86135 Augsburg, Germany.
authors.forename: Alexander A
authors.initials: AA
authors.lastname: Tsirlin
authors.affiliation: Department of Chemistry, Lomonosov Moscow State University , 119991 Moscow, Russia.
authors.forename: Andrei V
authors.initials: AV
authors.lastname: Shevelkov