A New Layered Mixed-Valent Potassium Vanadium Selenite, KV2SeO7

Kyu Seok Lee; Young Uk Kwon; Hae Namgung; Sei Hwan Kim

doi:10.1021/ic00120a023

A New Layered Mixed-Valent Potassium Vanadium Selenite, KV₂SeO₇

Kyu Seok Lee
, Young Uk Kwon
, Hae Namgung
, Sei Hwan Kim

Department of Chemistry

Sungkyunkwan University
Kookmin University

Research output: Contribution to journal › Article › peer-review

29 Scopus citations

Abstract

A new layered mixed-valent compound, KV₂SeO₇, has been hydrothermally synthesized from V₂O₅, V₂O₃, SeO₂, and KOH with mole ratios of 2:2:15:15 or 3:1:15:15 (in millimoles) in 12 mL of H₂O at 230 °C. Slight changes of the reaction conditions yielded different phases as impurities. The crystal structure has been determined from single-crystal X-ray diffraction. KV₂SeO₇ crystallizes in the orthorhombic space group Pnma (No. 62) with a = 17.954(8), b = 5.360(3), and c = 6.971(3) Å, V = 670.8(6) Å³, Z = 4, R = 0.0459. The structure is composed of alternating K⁺ and [V₂SeO₇]⁻ layers. The mixed-valent nature of this compound can be explained with two crystallographically distinct octahedral and tetrahedral sites for V⁴⁺ and V⁵⁺, respectively. The magnetic susceptibility curve shows an antiferromagnetic coupling which can be explained with a 1-D Heisenberg model for S = 1/2 with g = 1.86 and J/k = 22.5 K.

Original language	English
Pages (from-to)	4178-4181
Number of pages	4
Journal	Inorganic Chemistry
Volume	34
Issue number	16
DOIs	https://doi.org/10.1021/ic00120a023
State	Published - 1 Aug 1995

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@article{bc884fad2f964e7ebad409dab854b21b,

title = "A New Layered Mixed-Valent Potassium Vanadium Selenite, KV2SeO7",

abstract = "A new layered mixed-valent compound, KV2SeO7, has been hydrothermally synthesized from V2O5, V2O3, SeO2, and KOH with mole ratios of 2:2:15:15 or 3:1:15:15 (in millimoles) in 12 mL of H2O at 230 °C. Slight changes of the reaction conditions yielded different phases as impurities. The crystal structure has been determined from single-crystal X-ray diffraction. KV2SeO7 crystallizes in the orthorhombic space group Pnma (No. 62) with a = 17.954(8), b = 5.360(3), and c = 6.971(3) {\AA}, V = 670.8(6) {\AA}3, Z = 4, R = 0.0459. The structure is composed of alternating K+ and [V2SeO7]− layers. The mixed-valent nature of this compound can be explained with two crystallographically distinct octahedral and tetrahedral sites for V4+ and V5+, respectively. The magnetic susceptibility curve shows an antiferromagnetic coupling which can be explained with a 1-D Heisenberg model for S = 1/2 with g = 1.86 and J/k = 22.5 K.",

author = "Lee, \{Kyu Seok\} and Kwon, \{Young Uk\} and Hae Namgung and Kim, \{Sei Hwan\}",

year = "1995",

month = aug,

day = "1",

doi = "10.1021/ic00120a023",

language = "English",

volume = "34",

pages = "4178--4181",

journal = "Inorganic Chemistry",

issn = "0020-1669",

publisher = "American Chemical Society",

number = "16",

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TY - JOUR

T1 - A New Layered Mixed-Valent Potassium Vanadium Selenite, KV2SeO7

AU - Lee, Kyu Seok

AU - Kwon, Young Uk

AU - Namgung, Hae

AU - Kim, Sei Hwan

PY - 1995/8/1

Y1 - 1995/8/1

N2 - A new layered mixed-valent compound, KV2SeO7, has been hydrothermally synthesized from V2O5, V2O3, SeO2, and KOH with mole ratios of 2:2:15:15 or 3:1:15:15 (in millimoles) in 12 mL of H2O at 230 °C. Slight changes of the reaction conditions yielded different phases as impurities. The crystal structure has been determined from single-crystal X-ray diffraction. KV2SeO7 crystallizes in the orthorhombic space group Pnma (No. 62) with a = 17.954(8), b = 5.360(3), and c = 6.971(3) Å, V = 670.8(6) Å3, Z = 4, R = 0.0459. The structure is composed of alternating K+ and [V2SeO7]− layers. The mixed-valent nature of this compound can be explained with two crystallographically distinct octahedral and tetrahedral sites for V4+ and V5+, respectively. The magnetic susceptibility curve shows an antiferromagnetic coupling which can be explained with a 1-D Heisenberg model for S = 1/2 with g = 1.86 and J/k = 22.5 K.

AB - A new layered mixed-valent compound, KV2SeO7, has been hydrothermally synthesized from V2O5, V2O3, SeO2, and KOH with mole ratios of 2:2:15:15 or 3:1:15:15 (in millimoles) in 12 mL of H2O at 230 °C. Slight changes of the reaction conditions yielded different phases as impurities. The crystal structure has been determined from single-crystal X-ray diffraction. KV2SeO7 crystallizes in the orthorhombic space group Pnma (No. 62) with a = 17.954(8), b = 5.360(3), and c = 6.971(3) Å, V = 670.8(6) Å3, Z = 4, R = 0.0459. The structure is composed of alternating K+ and [V2SeO7]− layers. The mixed-valent nature of this compound can be explained with two crystallographically distinct octahedral and tetrahedral sites for V4+ and V5+, respectively. The magnetic susceptibility curve shows an antiferromagnetic coupling which can be explained with a 1-D Heisenberg model for S = 1/2 with g = 1.86 and J/k = 22.5 K.

UR - https://www.scopus.com/pages/publications/0000638340

U2 - 10.1021/ic00120a023

DO - 10.1021/ic00120a023

M3 - Article

AN - SCOPUS:0000638340

SN - 0020-1669

VL - 34

SP - 4178

EP - 4181

JO - Inorganic Chemistry

JF - Inorganic Chemistry

IS - 16

ER -

A New Layered Mixed-Valent Potassium Vanadium Selenite, KV₂SeO₇

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