Abstract
AbstractLa2SiP4 (mP‐28, Z=4, Wyckoff sequence e7, space group P21/c (No. 14), a=10.8230(6) Å, b=7.5208(4) Å, c=7.9189(4) Å, and β=105.389(2)°) which crystallizes in the La2CuS4 structure type is reported. Instead of isolated CuS3 triangles bridged by disulfide anions, in the crystal structure of La2SiP4, one‐dimensional zig‐zag chains composed of SiP4 tetrahedra connected by P−P bonds are present. Lanthanum cations fill the voids between the chains and are coordinated by either 9P or 8P+Si atoms. La2SiP4 is a narrow bandgap semiconductor with calculated and measured optical bandgaps of 0.35 eV and 0.85(1) eV, respectively.
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