Cluster Chemistry in Electron-Poor Ae–Pt–Cd Systems (Ae = Ca, Sr, Ba): (Sr,Ba)Pt₂Cd₄, Ca₆Pt₈Cd₁₆, and Its Known Antitype Er₆Pd₁₆Sb₈

Abstract

The new compounds Ca6Pt8Cd16 (I), SrPt2Cd4 (II), and BaPt2Cd4 (III) are identified in the title systems.

Crystal structure of the intermetallic compound SrCdPt

“…1). The existence of such strong Sr-Sr bonds is not noticeable in SrCd 4 Pt 2 (Samal et al, 2013). The platinum atoms in the structure of SrCdPt form zigzag chains of edgesharing cadmium-centred tetrahedra parallel to the b-axis direction.…”

“…Some other ternary intermetallic compounds of platinum with cadmium, viz. Ca 2 CdPt 2 (Samal & Corbett, 2012), Ca 6 Pt 8 Cd 16 , (Ba/Sr)Cd 4 Pt 2 (Samal et al, 2013), Ca 6 Cd 11 Pt (Gulo et al, 2013) and CaCdPt (Kersting et al, 2013) have been isolated recently. They demonstrate the diversity of the structures types adopted.…”

Crystal Chemistry of RE6MgxCd23–xPb [0.6(1) ≤ x ≤ 3.2(1); RE = La and Ce]. New Mixed‐Metal Derivatives of the RE6Cd23T Phases (T = Group 14/15/16 Element)

“…In the latter case, the four Mn 23 positions need not experience the same degree of mixed occupancy, and a more ordered distribution may be favored at certain sites due to electronic, magnetic, and/or volume effects . Other literature findings suggest that the chemical make‐up of the Mn 23 sub‐structure greatly influences the compound's bulk properties,, which may open the door for tuning of physical properties through substitutional chemistry.…”

Crystal Structure and Chemical Bonding Analysis of BaPtCd2

“…Recently, we have isolated BaPt 2 Cd 4 that contains chains of edge‐sharing Cd 4 tetrahedra bridged by four‐bonded Ba 3. With calcium, we have discovered the new compounds Ca 6 Pt 8 Cd 16 3 that is an ordered ternary variant of Sc 11 Ir 4 4 and Ca 6 PtCd 11 5 that presents a novel structure type. Ca 6 Pt 8 Cd 16 contains a 3D array of separate Cd 8 tetrahedral stars (TS) and a face‐centered cube of Pt@Ca 6 octahedra.…”