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Title: Framework Polymorphism and Modular Crystal Structures of Uranyl Vanadates of Divalent Cations: Synthesis and Characterization of M (UO 2)(V 2O 7) ( M = Ca, Sr) and Sr 3(UO 2)(V 2O 7) 2

Abstract

In this work, Uranyl vanadate compounds with divalent cations, M (UO 2)(V 2O 7) ( M = Ca, Sr) and Sr 3(UO 2)(V 2O 7) 2, were synthesized by flux crystal growth, and their crystal structures were solved using single-crystal X-ray diffraction data. Ca(UO 2)V 2O 7 and Sr(UO 2)V 2O 7 were synthesized from reactants with molar ratios M:U:V of 1:1:2 and identical heating conditions, and increasing the M:U:V ratio to 3:1:4 resulted in Sr 3(UO 2)(V 2O 7) 2. Crystallographic data for M(UO2)V2O7 compounds are: a = 7.1774(18) Å, b = 6.7753(17) Å, c = 8.308(2) Å; V = 404.01(18) Å 3; space group Pmn21, Z = 2 for Ca; a = 13.4816(11) Å, b = 7.3218(6) Å, c = 8.4886(7) Å; V = 837.91(12) Å3; space group Pnma, Z = 4 for Sr. Compound Sr 3(UO 2)(V 2O 7) 2 has a = 6.891(3) Å, b = 7.171(3) Å, c = 14.696(6) Å, α = 85.201(4)°, β = 78.003(4)°, γ = 89.188(4)°; V = 707.9(5) Å 3; space group P1, Z = 2. The framework structure of Sr(UO 2)(V 2O 7) is related to that of Pb(UO 2)(V 2O 7) reported previously, while that of Ca(UO 2)(Vmore » 2O 7) has a different topology. The topological polymorphism of the [(UO 2)(V 2O 7)]-type framework may be due to the differing ionic radii of the guest M 2+ cations. Compound Sr 3(UO 2)(V 2O 7) 2 has a modular structure based on two different types of electroneutral layers: [Sr(UO 2)(V 2O 7)] and [Sr 2(V 2O 7)]. This report calculated Structural complexities, and Raman spectra were collected and their peaks were assigned.« less

Authors:
 [1];  [1];  [1];  [1];  [1];  [1]
  1. Univ. of Notre Dame, IN (United States)
Publication Date:
Research Org.:
Univ. of Notre Dame, IN (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1544425
Grant/Contract Number:  
NA0003763
Resource Type:
Accepted Manuscript
Journal Name:
Zeitschrift fuer Anorganische und Allgemeine Chemie
Additional Journal Information:
Journal Name: Zeitschrift fuer Anorganische und Allgemeine Chemie; Journal ID: ISSN 0044-2313
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY

Citation Formats

Chong, Saehwa, Aksenov, Sergey M., Dal Bo, Fabrice, Perry, Samuel N., Dimakopoulou, Foteini, and Burns, Peter C. Framework Polymorphism and Modular Crystal Structures of Uranyl Vanadates of Divalent Cations: Synthesis and Characterization of M (UO2)(V2O7) (M = Ca, Sr) and Sr3(UO2)(V2O7)2. United States: N. p., 2019. Web. doi:10.1002/zaac.201900092.
Chong, Saehwa, Aksenov, Sergey M., Dal Bo, Fabrice, Perry, Samuel N., Dimakopoulou, Foteini, & Burns, Peter C. Framework Polymorphism and Modular Crystal Structures of Uranyl Vanadates of Divalent Cations: Synthesis and Characterization of M (UO2)(V2O7) (M = Ca, Sr) and Sr3(UO2)(V2O7)2. United States. doi:10.1002/zaac.201900092.
Chong, Saehwa, Aksenov, Sergey M., Dal Bo, Fabrice, Perry, Samuel N., Dimakopoulou, Foteini, and Burns, Peter C. Thu . "Framework Polymorphism and Modular Crystal Structures of Uranyl Vanadates of Divalent Cations: Synthesis and Characterization of M (UO2)(V2O7) (M = Ca, Sr) and Sr3(UO2)(V2O7)2". United States. doi:10.1002/zaac.201900092.
@article{osti_1544425,
title = {Framework Polymorphism and Modular Crystal Structures of Uranyl Vanadates of Divalent Cations: Synthesis and Characterization of M (UO2)(V2O7) (M = Ca, Sr) and Sr3(UO2)(V2O7)2},
author = {Chong, Saehwa and Aksenov, Sergey M. and Dal Bo, Fabrice and Perry, Samuel N. and Dimakopoulou, Foteini and Burns, Peter C.},
abstractNote = {In this work, Uranyl vanadate compounds with divalent cations, M (UO2)(V2O7) (M = Ca, Sr) and Sr3(UO2)(V2O7)2, were synthesized by flux crystal growth, and their crystal structures were solved using single-crystal X-ray diffraction data. Ca(UO2)V2O7 and Sr(UO2)V2O7 were synthesized from reactants with molar ratios M:U:V of 1:1:2 and identical heating conditions, and increasing the M:U:V ratio to 3:1:4 resulted in Sr3(UO2)(V2O7)2. Crystallographic data for M(UO2)V2O7 compounds are: a = 7.1774(18) Å, b = 6.7753(17) Å, c = 8.308(2) Å; V = 404.01(18) Å3; space group Pmn21, Z = 2 for Ca; a = 13.4816(11) Å, b = 7.3218(6) Å, c = 8.4886(7) Å; V = 837.91(12) Å3; space group Pnma, Z = 4 for Sr. Compound Sr3(UO2)(V2O7)2 has a = 6.891(3) Å, b = 7.171(3) Å, c = 14.696(6) Å, α = 85.201(4)°, β = 78.003(4)°, γ = 89.188(4)°; V = 707.9(5) Å3; space group P1, Z = 2. The framework structure of Sr(UO2)(V2O7) is related to that of Pb(UO2)(V2O7) reported previously, while that of Ca(UO2)(V2O7) has a different topology. The topological polymorphism of the [(UO2)(V2O7)]-type framework may be due to the differing ionic radii of the guest M2+ cations. Compound Sr3(UO2)(V2O7)2 has a modular structure based on two different types of electroneutral layers: [Sr(UO2)(V2O7)] and [Sr2(V2O7)]. This report calculated Structural complexities, and Raman spectra were collected and their peaks were assigned.},
doi = {10.1002/zaac.201900092},
journal = {Zeitschrift fuer Anorganische und Allgemeine Chemie},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {7}
}

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Works referenced in this record:

Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides
journal, September 1976