K(Th0.75Sr0.25)2Se6: Structural Change Resulting from the Disorder of Differently Charged Cations

Adel Mesbah; Jai Prakash; Jessica C. Beard; Christos D. Malliakas; James A. Ibers

doi:10.1021/acs.inorgchem.8b00925

K(Th_0.75Sr_0.25)₂Se₆: Structural Change Resulting from the Disorder of Differently Charged Cations

Adel Mesbah, Jai Prakash, Jessica C. Beard, Christos D. Malliakas, James A. Ibers^*

^*Corresponding author for this work

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

1 Scopus citations

Abstract

Single crystals of K(Th_0.75Sr_0.25)₂Se₆ were obtained by a standard solid-state chemistry route at 1173 K. This compound does not belong to the AAn₂Q₆ family (A = K, Rb, Cs, or Tl; An = Th, U, or Np; Q = S, Se, or Te) that possesses infinite Q-Q-Q chains and where a charge distribution of A⁺, 2 × An⁴⁺, 2 × Q^2-, 2 × (Q₂^2.5-) has been proposed and hence a charge of -1.25 on Q of the "dichalcogenide". Rather in K(Th_0.75Sr_0.25)₂Se₆, where the Th and Sr cations randomly occupy the same site, incorporation of these differently charged cations breaks the infinite Se-Se-Se chains into a structure that has typical Se₂^2- pairs.

Original language	English (US)
Pages (from-to)	7877-7880
Number of pages	4
Journal	Inorganic chemistry
Volume	57
Issue number	13
DOIs	https://doi.org/10.1021/acs.inorgchem.8b00925
State	Published - Jul 2 2018

ASJC Scopus subject areas

Inorganic Chemistry
Physical and Theoretical Chemistry

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10.1021/acs.inorgchem.8b00925

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title = "K(Th0.75Sr0.25)2Se6: Structural Change Resulting from the Disorder of Differently Charged Cations",

abstract = "Single crystals of K(Th0.75Sr0.25)2Se6 were obtained by a standard solid-state chemistry route at 1173 K. This compound does not belong to the AAn2Q6 family (A = K, Rb, Cs, or Tl; An = Th, U, or Np; Q = S, Se, or Te) that possesses infinite Q-Q-Q chains and where a charge distribution of A+, 2 × An4+, 2 × Q2-, 2 × (Q22.5-) has been proposed and hence a charge of -1.25 on Q of the {"}dichalcogenide{"}. Rather in K(Th0.75Sr0.25)2Se6, where the Th and Sr cations randomly occupy the same site, incorporation of these differently charged cations breaks the infinite Se-Se-Se chains into a structure that has typical Se22- pairs.",

author = "Adel Mesbah and Jai Prakash and Beard, {Jessica C.} and Malliakas, {Christos D.} and Ibers, {James A.}",

note = "Publisher Copyright: {\textcopyright} 2018 American Chemical Society.",

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doi = "10.1021/acs.inorgchem.8b00925",

language = "English (US)",

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number = "13",

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T1 - K(Th0.75Sr0.25)2Se6

T2 - Structural Change Resulting from the Disorder of Differently Charged Cations

AU - Mesbah, Adel

AU - Prakash, Jai

AU - Beard, Jessica C.

AU - Malliakas, Christos D.

AU - Ibers, James A.

PY - 2018/7/2

Y1 - 2018/7/2

N2 - Single crystals of K(Th0.75Sr0.25)2Se6 were obtained by a standard solid-state chemistry route at 1173 K. This compound does not belong to the AAn2Q6 family (A = K, Rb, Cs, or Tl; An = Th, U, or Np; Q = S, Se, or Te) that possesses infinite Q-Q-Q chains and where a charge distribution of A+, 2 × An4+, 2 × Q2-, 2 × (Q22.5-) has been proposed and hence a charge of -1.25 on Q of the "dichalcogenide". Rather in K(Th0.75Sr0.25)2Se6, where the Th and Sr cations randomly occupy the same site, incorporation of these differently charged cations breaks the infinite Se-Se-Se chains into a structure that has typical Se22- pairs.

AB - Single crystals of K(Th0.75Sr0.25)2Se6 were obtained by a standard solid-state chemistry route at 1173 K. This compound does not belong to the AAn2Q6 family (A = K, Rb, Cs, or Tl; An = Th, U, or Np; Q = S, Se, or Te) that possesses infinite Q-Q-Q chains and where a charge distribution of A+, 2 × An4+, 2 × Q2-, 2 × (Q22.5-) has been proposed and hence a charge of -1.25 on Q of the "dichalcogenide". Rather in K(Th0.75Sr0.25)2Se6, where the Th and Sr cations randomly occupy the same site, incorporation of these differently charged cations breaks the infinite Se-Se-Se chains into a structure that has typical Se22- pairs.

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ER -

K(Th_0.75Sr_0.25)₂Se₆: Structural Change Resulting from the Disorder of Differently Charged Cations

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CSD 1837536: Experimental Crystal Structure Determination

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K(Th0.75Sr0.25)2Se6: Structural Change Resulting from the Disorder of Differently Charged Cations

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CSD 1837536: Experimental Crystal Structure Determination

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K(Th_0.75Sr_0.25)₂Se₆: Structural Change Resulting from the Disorder of Differently Charged Cations