Kluge, W.

, p. 497 - 497 (1931)

The tellurophosphate K4P8Te4: Phase-change properties, exfoliation, photoluminescence in solution and nanospheres

Chung, In,Song, Jung-Hwan,Kim, Myung Gil,Malliakas, Christos D.,Karst, Angela L.,Freeman, Arthur J.,Weliky, David P.,Kanatzidis, Mercouri G.

, p. 16303 - 16312 (2009)

We describe the inorganic polymer K4P8Te4 which is soluble, giving solutions that exhibit white emission upon 355 nm laser irradiation. An indirect band gap semiconductor (Eg ≈ 1.4 eV), K4P8/sub

K4Ti3Te9 - A new pseudo one-dimensional polyanionic alkali chalcogenometallate(IV)

Kolb, Andreas,Klepp, Kurt O.

, p. 633 - 638 (2003)

Lustrous black needle shaped single crystals of K4Ti 3Te9 were obtained by reacting K2Te with the corresponding elemental components at 1000°C. K4Ti 3Te9 is monoclinic, mP64, s.g. P21/c (No. 14), Z = 4 with a = 9.052(2), b = 8.088(1), c = 29.465(9) A?, β = 92.35(1)°. The crystal structure was determined from diffractometer data and refined to a conventional R value of 0.035 (2840 Fo's, 146 variables). The compound contains undulating polyanionic chains built up by severely distorted TiTe6 octahedra sharing opposite faces which run parallel to [100] and are arranged in a hexagonal rod packing. The translation period comprises three octahedra. The most striking feature of this compound is the formation of two ditelluride groups per formula unit with unusually long Te-Te distances of 2.960(2) and 3.025(2) A?, respectively. All other Te-Te distances start at 3.2 A?. The nearest homonuclear neighbours of the two pairs are at 3.215(2) and 3.333(2) A? apart. Ti-Te bond lengths range from 2.700(3) to 2.841(3) A? with an average value of 2.772(4) A? for all three crystallographically independent titanium atoms. The alkali cations are irregularly coordinated by 7 to 9 tellurium atoms.

Equilibrium among potassium polytellurides in N,N-dimethylformamide solution

McAfee, Jason L.,Andreatta, Jeremy R.,Sevcik, Richard S.,Schultz, Linda D.

, p. 68 - 71 (2012)

Reactions between elemental potassium and tellurium in N,N- dimethylformamide (DMF) are monitored using UV-visible spectroscopy and compared with those in liquid ammonia solution. In liquid ammonia, the elements react together, via a step-wise sequence, to form polytellurides, each of which is characterized by a distinctive color, the highest being potassium tritelluride. However, when the elements are combined in DMF, these distinctive color changes are not observed - the solution develops an initial plum color, which gradually darkens to purple as the reaction progresses. UV-visible and Raman spectroscopic studies indicate that equilibrium exists among the mono-, di-, and tritelluride in DMF. This equilibrium is not seen in liquid ammonia solution due to the insolubility of potassium monotelluride in that solvent. Spectral data also indicate that potassium tetratelluride is formed in DMF solution.

Dipropadienyl telluride

Potapov,Musalov,Andreev,Musalova,Rusakov, Yu. Yu.,Amosova

, p. 2343 - 2344 (2018/03/25)

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Novel route to the synthesis of chalcogenolanes, chalcogenanes, and 1,2-dichalcogenaepanes

Levanova,Grabel'Nykh,Elaev,Russavskaya,Klyba,Albanov,Korchevin

, p. 1345 - 1352 (2014/07/21)

The saturated heterocyclic compounds C4H8Y, C 5H10Y, and C5H10Y2 (Y = Se or Te) have been prepared by the reaction of 1,4-dibromobutane or 1,5-dibromopentane with potassium chalcogenides. The novelty of the route consists of the use of the hydrazine hydrate-KOH system for the reductive generation of potassium selenide, telluride, diselenide or ditelluride from elemental chalcogens.