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Sr₄Pt₁₀In₂₁ – the first representative of the Ho₄Ni₁₀In₂₁ type with a divalent cation
- Heying, Birgit, Kösters, Jutta, Pöttgen, Rainer
- Zeitschrift für Naturforschung 2019 v.74 no.5 pp. 443-449
- X-ray diffraction, carbon, cations, crystals, furnaces, platinum, prisms, strontium
- Rod-shaped single crystals of Sr₄Pt₁₀In₂₁ were prepared from the elements in glassy-carbon crucibles in a high-frequency furnace. The structure of Sr₄Pt₁₀In₂₁ was refined from single-crystal X-ray diffractometer data: C2/m, Ho₄Ni₁₀Ga₂₁ type, a = 2322.62(7), b = 450.27(2), c = 1958.09(7) pm, β = 133.191(3)°, wR = 0.0464, 3200 F² values and 107 variables. The three-dimensional [Pt₁₀In₂₁]ᵟ⁻ polyanionic network is stabilized through substantial Pt–In (269–313 pm Pt–In) and In–In (294–362 pm In–In) bonding. All platinum atoms have slightly distorted tri-capped trigonal prismatic coordination and the two crystallographically independent strontium atoms are located in penta-capped pentagonal prisms.