On the divalent character of the Eu atoms in the ternary Zintl phases Eu₅In₂Pn₆and Eu₃MAs₃(Pn = As–Bi; M = Al, Ga)

Abstract

Structural and property investigations of the five Zintl phases Eu5In2Pn6 and Eu3MAs3 (Pn = As–Bi; M = Al, Ga) including magnetic and 121Sb and 151Eu Mössbauer spectroscopic measurements.

Structural, Physical, Theoretical and Spectroscopic Investigations of Mixed‐Valent Eu2Ni8Si3 and Its Structural Anti‐Type Sr2Pt3Al8

“…Furthermore, a correlation of the electric field gradient (78 K: Δ E Q (Eu 2+ )=6.8(1) mm s −1 ; 6 K: (Δ E Q (Eu 3+ )=−0.7(3) mm s −1 ) and the line width is possible. Such a scenario usually arises near the magnetic ordering temperature and can be fitted using a distribution of magnetic hyperfine fields, as shown for the Eu‐containing Zintl ‐phases Eu 5 In 2 Pn 6 ( Pn =As, Sb) [70] and Eu 14 Al Pn 11 ( Pn =As, Sb) [71] …”

Crystal structure characterization and electronic structure of a rare-earth-containing Zintl phase in the Yb–Al–Sb family: Yb3AlSb3

“…To date, all of the reported compositions, except the rare-earth phase Eu 3 InAs 3 (Rajput et al, 2020), are p-type semiconductors. Yb 3 AlSb 3 appears as a new rare-earth containing 3-1-3 phase and the only Yb-containing phase to date, after the reported Eu phases of Eu 3 AlAs 3 , Eu 3 GaAs 3 , (Radzieowski et al, 2020), Eu 3 InP 3 (Jiang et al, 2005), and Eu 3 InAs 3 (Rajput et al, 2020). It is isostructural with Ca 3 AlAs 3 (Cordier et al, 1982), Ca 3 AlSb 3 (Cordier et al, 1984), Ca 3 InP 3 (Cordier et al, 1985), Ca 3 GaAs 3 (Cordier et al, 1985), Sr 3 InP 3 (Cordier et al, 1987), Eu 3 InP 3 (Jiang et al, 2005), Eu 3 InAs 3 and Sr 3 InAs 3 (Rajput et al, 2020), and Ba 3 InAs 3 (Somer et al, 1996).…”

“…To date there are five types of structures with the 3-1-3 composition and the different structure types are attributed to the size differences of each atomic species (Cordier et al, 1987). Sr 3 GaSb 3 (space group P2 1 /n) (Cordier et al, 1987) and Eu 3 AlAs 3 (space group P2 1 /c) (Radzieowski et al, 2020) are the two structure types that crystallize in the monoclinic crystal system. The other three, i.e.…”

“…In the Ca 3 AlAs 3 structure type (Cordier et al, 1982), the infinite chain structure is similar to the Sr 3 GaSb 3 type (Cordier et al, 1987), but the tetrahedra form a straight line, with one tetrahedron as the repeating unit. In the Ba 3 GaSb 3 (Cordier et al, 1985), Ba 3 AlSb 3 (Cordier et al, 1982), and Eu 3 AlAs 3 types (Radzieowski et al, 2020), each two tetrahedra share a Pn-containing edge (Pn = Ba or As) to form isolated dimeric anion pairs [Al 2 Pn 6 ] 12À .…”

Bipolar doping and thermoelectric properties of Zintl arsenide Eu5In2As6

“…The crystal structure of Zintl arsenide Eu5In2As6 belongs to the orthorhombic space group Pbam, as shown in Figure 1. 28,29 Each In atom is four-fold coordinated by As atoms to form InAs4 tetrahedra, which are corner-shared along the c axis. The chains of InAs4 tetrahedra are further bridged by As-As bonds.…”