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A layered mercury telluride, Rb 2 Hg 3 Te 4, was discovered during an exploration of hydro(solvo)thermal synthesis of tellurides at temperatures somewhat above the boiling point of ethylenediamine. Crystals of Rb 2 Hg 3 Te 4 were grown from solvothermal reactions using ethylenediamine as a solvent. Single crystal X-ray diffraction analysis shows that this compound belongs to the orthorhombic system, space group Pbcn (No. 60) with lattice parameters a = 12.177(2) Å, b = 7.245(2) Å, c = 14.545(2) Å, and Z = 4. The structure contains two-dimensional layers of [Hg 3 Te 4 2 - ] which are separated by the Rb + counterions. The interlayer Te−Te distances imply weak van der Waals interactions. Rb 2 Hg 3 Te 4 is the first two-dimensional mercury telluride prepared by an unconventional low-temperature technique.
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Li et al. (1997) studied this question.
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