Merging the AuCu₃- and BaAl₄-based structure motifs: flux-assisted synthesis, crystal, and electronic structure of Ca₂Pt₇XP_4−δ phosphide platinides (X = Al, Ti, and Zn)

Abstract

Three quaternary phosphide platinides, Ca2Pt7AlP3.00(4), Ca2Pt7TiP3.24(4), and Ca2Pt7ZnP2.78(2), were synthesized by a high-temperature technique using lead as a flux. According to the single-crystal diffraction data, they are isotypic and crystallize...

The Zintl Concept Applied to Intergrowth Structures: Electron‐Hole Matching, Stacking Preferences, and Chemical Pressures in Pd5InAs

“…The transferability of these bonding schemes among the structures hints that analogous pictures can be drawn for other group 10 metalbased compounds. We are looking forward to seeing how similar bonding configurations may be used to unify the broader structural chemistry [13][14][15][16][17] of this family of intermetallic phases.…”

“…In this Article, we will consider the structure of Pd 5 InAs as an instance of such a situation, in which a preferred stacking arrangement reveals key bonding features. This compound represents a broader family of group 10 element-rich intermetallics incorporating AuCu 3 -type units [13][14][15][16][17] and has previously been explored for its potential to host hydrogen. [18] It adopts the Pd 5 TlAs structure type (Figure 1), [19][20][21] in which 1-unit-cell thick slabs of the AuCu 3 type and layers of edge-sharing filled square prisms derived from the PtHg 2 type [22] (or its stacking variant, the fluorite type) [23] alternate along the c direction.…”