High temperature-high pressure synthesis and crystal structure of the incommensurately modulated, alpha-PbO2 related, compound MnTa2O6 / Tarakina NV,Tyutyunnik AP,Zubkov VG,D'Yachkova TV,Zainulin YG,Hannerz H,Svensson G // SOLID STATE SCIENCES. - 2003. - V. 5, l. 7. - P. 983-994.

ISSN/EISSN:

1293-2558 / нет данных

Type:

Article

Abstract:

A new high pressure-high temperature modification of MnTa2O6 has been prepared at T = 1400degreesC, P = 8 GPa. Electron and X-ray powder diffraction (XRPD) studies showed it to have a modulated alpha-PbO2 structure. It crystallises in the four-dimensional space group P: P112(1)/n (alphabeta0). The structure model could be refined by the Rietveld technique, using XRPD data. An incommensurate ordering of the Mn and Ta atoms gives rise to a modulation of the oxygen and metal atoms' positions. The occupational modulation is described by a combination of a Crenel and a sinusoidal function, whereas the positional modulations can be described purely by sinusoidal functions. The unit cell parameters are a = 4.7472(2) Angstrom, b = 5.7453(3) Angstrom, c = 5.1496(3) Angstrom, gamma = 90.023(9)degrees, and the modulation vector is q = -0. 1038(4) (.) a{*} + 0.6910(7) (.) b{*}. (C) 2003 Editions scientifiques et medicales Elsevier SAS. All rights reserved.

Author keywords:

manganese tantalum oxide; oxotantalate; X-ray powder diffraction; Rietveld refinement; crystal structure; high pressure; electron diffraction; electron microscopy; modulated structure X-RAY-POWDER; MAGNETIC-SUSCEPTIBILITY; DIFFRACTION; REFINEMENT; ELECTRON; RUTILE; PHASE

DOI:

10.1016/S1293-2558(03)00122-5

Web of Science ID:

ISI:000184747000005

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	JUL
Publisher	ELSEVIER SCIENCE BV
Address	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Language	English
Keywords-Plus	X-RAY-POWDER; MAGNETIC-SUSCEPTIBILITY; DIFFRACTION; REFINEMENT; ELECTRON; RUTILE; PHASE
Research-Areas	Chemistry; Physics
Web-of-Science-Categories	Chemistry, Inorganic \& Nuclear; Chemistry, Physical; Physics, Condensed Matter
ResearcherID-Numbers	Tarakina, Nadezda/A-7870-2013 Tyutyunnik, Alexander/P-2230-2015
ORCID-Numbers	Tarakina, Nadezda/0000-0002-2365-861X
Number-of-Cited-References	20
Usage-Count-Last-180-days	2
Usage-Count-Since-2013	17
Journal-ISO	Solid State Sci.
Doc-Delivery-Number	711NB