Crystal structure and resistivity characteristics of new tantalum bronze K6Ta6.5O15 + x F6 + y

Arakcheeva, A. V.; Grinevich, Valery; Mitin, A. V.; Lubman, G. U.; Шамрай, В. Ф.

doi:10.1134/1.1358390

Cited by 7 publications

(20 citation statements)

References 2 publications

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“…Both types of crystals were formed in one experiment. X-ray diffraction analysis (DRON-3M diffractometer, Mo K α radiation) of the powder prepared from the cathode product indicated that all the crystals were hexagonal tantalum bronzes, one of which was studied in detail earlier [4]. Both types of crystals had the habit of elongated hexagonal prisms or their fragments.…”

Section: Synthesismentioning

confidence: 99%

“…As a result, we obtained new data on the structure type and the effect of the degree of tantalum oxidation and their effect on the fine details of the crystal structure and the optical characteristics of these crystals. The comparative analysis of newly established structural characteristics was performed based on the data obtained and the known data [4,5]. The results of this analysis are considered below.…”

Section: Structure Of Inorganic Compoundsmentioning

confidence: 99%

“…The refinement method was described in detail in the structure determination of the analogous compound-black hexagonal bronze [4]. The atomic coordinates of the structure framework borrowed from [4] [Ta(1), K, O(1), O(2), O(3), and F(1)] were refined in the full-matrix anisotropic approximation of atomic thermal vibrations within the sp.…”

Section: Structure Refinementmentioning

confidence: 99%

“…The atomic coordinates of the structure framework borrowed from [4] [Ta(1), K, O(1), O(2), O(3), and F(1)] were refined in the full-matrix anisotropic approximation of atomic thermal vibrations within the sp. gr.…”

Section: Structure Refinementmentioning

confidence: 99%

“…The structure of the hexagonal bronze-conductor of the composition K 6 Ta 6.5 O 15 + x F 6 + y [4] is compared with the structure of its dielectric analogue A. V. Arakcheeva*, G. Chapuis**, V. V. Grinevich*, and V. F. Shamra oe * K 6 Ta 6.5 O 14.5 F 9.5 [5] refined in a rather crude approximation. As a result, the conclusions drawn in [4] are not complete.…”

Section: Introductionmentioning

confidence: 99%

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Structure type of hexagonal tantalum bronzes with variable composition K6Ta6 + Z O15F6(F, O)y: Ta(5 − δ)+ bronzes and Ta5+ compounds

et al. 2004

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-The structure type of hexagonal compounds with the variable composition K 6 Ta 6 + z O 15 F 6 ( F , O ) y , where Z ≤ 1 and y ≤ 3 (sp. gr. P 6/ m , a ~ 13.12 Å, c ~ 3.86 Å) has been studied. Based on the structural data for a crystal of the Ta 5+ -containing compound and two crystals of Ta (5 -δ )+ -containing bronzes formed at the cathode during electrolysis of salt melts containing Ta + cations, it was established that the bronze formation is associated with the interstitial defects of intercalated Ta cations. The scheme of reduction of Ta cations at the cathode is suggested, and the formulas of the compounds are obtained with due regard for partial Ta reduction to various integral oxidation degrees. The crystals of the colorless transparent Ta

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Section: Synthesismentioning

confidence: 99%

Section: Structure Of Inorganic Compoundsmentioning

confidence: 99%