Report of the Double-Molybdate Phase Cs2Ba(MoO4)2 with a Palmierite Structure and Its Thermodynamic Characterization

Title

Report of the Double-Molybdate Phase Cs2Ba(MoO4)2 with a Palmierite Structure and Its Thermodynamic Characterization

 Author

Smith, A.L. (TU Delft RST/Reactor Physics and Nuclear Materials)
de Zoete, Nathan (Student TU Delft)
Rutten, Maikel (Student TU Delft)
van Eijck, L. (TU Delft RST/Neutron and Positron Methods in Materials) ORCID 0000-0003-2047-2665
Griveau, Jean Christophe (European Commission Joint Research Centre)
Colineau, Eric (European Commission Joint Research Centre)

Date

2020

 Abstract

The existence of a novel double-molybdate phase with a palmierite-type structure, Cs2Ba(MoO4)2, is revealed in this work, and its structural properties at room temperature have been characterized in detail using X-ray and neutron diffraction measurements. In addition, its thermal stability and thermal expansion are investigated in the temperature range 298-673 K using high-temperature X-ray diffraction, leading to the volumetric thermal expansion coefficient αV ≈ 43.0 × 10-6 K-1. The compound's standard enthalpy of formation at 298.15 K has been obtained using solution calorimetry, which yielded ΔfHm°(Cs2Ba(MoO4)2, cr, 298.15 K) = -3066.6 ± 3.1 kJ· mol-1, and its standard entropy at 298.15 K has been derived from low-temperature (2.1-294.3 K) thermal-relaxation calorimetry as Sm°(Cs2Ba(MoO4)2, cr, 298.15 K) = 381.2 ± 11.8 J K-1 mol-1.


 To reference this document use:

http://resolver.tudelft.nl/uuid:5dd82afb-201e-4c4a-bc16-eec37faf7a62

 DOI

https://doi.org/10.1021/acs.inorgchem.0c01469

 ISSN

0020-1669

 Source

Inorganic Chemistry, 59 (18), 13162-13173

 Part of collection

Institutional Repository

 Document type

journal article

 Rights

© 2020 A.L. Smith, Nathan de Zoete, Maikel Rutten, L. van Eijck, Jean Christophe Griveau, Eric Colineau
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