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K3Cr2(PS4)3: A New Chromium Thiophosphate with a One‐Dimensional [Cr2(PS4)]3— Anion Chain
Authors:Volkmar Derstroff,Jü  rgen Ensling,Vadim Ksenofontov,Philipp Gü  tlich,Wolfgang Tremel
Abstract:
A new chromium thiophosphate, K3Cr2(PS4)3 has been prepared and characterized by single‐crystal diffraction, temperature dependent magnetic susceptibility measurements and optical spectroscopy. K3Cr2(PS4)3 crystallizes in the monoclinic space group P21/n (No. 14) with a = 9.731(2) Å, b = 11.986(2) Å, c = 17.727(4) Å, β = 96.52(2)°, V = 2054.2(2) Å3, Z = 4, and R = 0.044. The anionic part of the structure consists of dimeric Cr23‐S3PS)2 units which are linked by bidentate PS4 groups to form infinite one‐dimensional [S2PS2Cr23S3PS)2]3— chains separated by K+ cations. The CrIII centers of the Cr23‐S3PS)2 units are antiferromagnetically coupled. The magnetic susceptibility data may be fitted using a D‐Heisenberg model for S = 3/2 with g = 2.02 and J/k = 10K. K3Cr2(PS4)3 is semiconducting with an optical band gap of 1.35 eV.
Keywords:Chromium  Chalcogenides  Thiophosphates  Crystal structures  Magnetic properties
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