Crystallisation of some mixed Na/V and K/V fluorides by solvothermal methods

David W. Aldous; Philip Lightfoot

doi:10.1016/j.solidstatesciences.2008.09.003

Crystallisation of some mixed Na/V and K/V fluorides by solvothermal methods

David W. Aldous, Philip Lightfoot

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51 Citations (Scopus)

Abstract

Single crystals of several phases in the Na-V-(O)F and K-V-(O)F systems have been grown using a mild solvothermal route in water/ethylene glycol. At a temperature of 100 degrees C the V4+-containing oxyfluoride phases Na4V2O2F8 and K2VOF4 are prepared, exhibiting dimeric and chain-like vanadium oxyfluoride units, respectively. On raising the reaction temperature to 220 degrees C reduction to V3+, occurs, and three different two-dimensional sheet structures are crystallised, NaVF4, KVF4 and K5V3F14. Precise crystal structures are reported for the latter two, which represent members of the Dion-Jacobson and Chiolite families, respectively. (C) 2008 Elsevier Masson SAS. All rights reserved.

Original language	English
Pages (from-to)	315-319
Number of pages	5
Journal	Solid State Sciences
Volume	11
Issue number	2
DOIs	https://doi.org/10.1016/j.solidstatesciences.2008.09.003
Publication status	Published - Feb 2009

Keywords

Vanadium fluoride
Solvothermal synthesis
Crystal structure
Crystal growth
CRYSTAL-STRUCTURE
REDUCING CONDITIONS
FLUX GROWTH
VANADIUM
OXYFLUORIDES
CHEMISTRY
NAVF3
KTIF4
RBVF3
KVF3

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10.1016/j.solidstatesciences.2008.09.003

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title = "Crystallisation of some mixed Na/V and K/V fluorides by solvothermal methods",

abstract = "Single crystals of several phases in the Na-V-(O)F and K-V-(O)F systems have been grown using a mild solvothermal route in water/ethylene glycol. At a temperature of 100 degrees C the V4+-containing oxyfluoride phases Na4V2O2F8 and K2VOF4 are prepared, exhibiting dimeric and chain-like vanadium oxyfluoride units, respectively. On raising the reaction temperature to 220 degrees C reduction to V3+, occurs, and three different two-dimensional sheet structures are crystallised, NaVF4, KVF4 and K5V3F14. Precise crystal structures are reported for the latter two, which represent members of the Dion-Jacobson and Chiolite families, respectively. (C) 2008 Elsevier Masson SAS. All rights reserved.",

keywords = "Vanadium fluoride, Solvothermal synthesis, Crystal structure, Crystal growth, CRYSTAL-STRUCTURE, REDUCING CONDITIONS, FLUX GROWTH, VANADIUM, OXYFLUORIDES, CHEMISTRY, NAVF3, KTIF4, RBVF3, KVF3",

author = "Aldous, {David W.} and Philip Lightfoot",

year = "2009",

month = feb,

doi = "10.1016/j.solidstatesciences.2008.09.003",

language = "English",

volume = "11",

pages = "315--319",

journal = "Solid State Sciences",

issn = "1293-2558",

publisher = "Elsevier Science BV",

number = "2",

}

TY - JOUR

T1 - Crystallisation of some mixed Na/V and K/V fluorides by solvothermal methods

AU - Aldous, David W.

AU - Lightfoot, Philip

PY - 2009/2

Y1 - 2009/2

N2 - Single crystals of several phases in the Na-V-(O)F and K-V-(O)F systems have been grown using a mild solvothermal route in water/ethylene glycol. At a temperature of 100 degrees C the V4+-containing oxyfluoride phases Na4V2O2F8 and K2VOF4 are prepared, exhibiting dimeric and chain-like vanadium oxyfluoride units, respectively. On raising the reaction temperature to 220 degrees C reduction to V3+, occurs, and three different two-dimensional sheet structures are crystallised, NaVF4, KVF4 and K5V3F14. Precise crystal structures are reported for the latter two, which represent members of the Dion-Jacobson and Chiolite families, respectively. (C) 2008 Elsevier Masson SAS. All rights reserved.

AB - Single crystals of several phases in the Na-V-(O)F and K-V-(O)F systems have been grown using a mild solvothermal route in water/ethylene glycol. At a temperature of 100 degrees C the V4+-containing oxyfluoride phases Na4V2O2F8 and K2VOF4 are prepared, exhibiting dimeric and chain-like vanadium oxyfluoride units, respectively. On raising the reaction temperature to 220 degrees C reduction to V3+, occurs, and three different two-dimensional sheet structures are crystallised, NaVF4, KVF4 and K5V3F14. Precise crystal structures are reported for the latter two, which represent members of the Dion-Jacobson and Chiolite families, respectively. (C) 2008 Elsevier Masson SAS. All rights reserved.

KW - Vanadium fluoride

KW - Solvothermal synthesis

KW - Crystal structure

KW - Crystal growth

KW - CRYSTAL-STRUCTURE

KW - REDUCING CONDITIONS

KW - FLUX GROWTH

KW - VANADIUM

KW - OXYFLUORIDES

KW - CHEMISTRY

KW - NAVF3

KW - KTIF4

KW - RBVF3

KW - KVF3

U2 - 10.1016/j.solidstatesciences.2008.09.003

DO - 10.1016/j.solidstatesciences.2008.09.003

M3 - Article

SN - 1293-2558

VL - 11

SP - 315

EP - 319

JO - Solid State Sciences

JF - Solid State Sciences

IS - 2

ER -

Crystallisation of some mixed Na/V and K/V fluorides by solvothermal methods

Abstract

Keywords

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