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Synthesis, Crystal Structure, and Properties of Three La-Zn-P Compounds with Different Dimensionalities of the Zn-P Framework

TitleSynthesis, Crystal Structure, and Properties of Three La-Zn-P Compounds with Different Dimensionalities of the Zn-P Framework
Publication TypeJournal Article
Year of Publication2018
AuthorsWang, J, Yox, P, Voyles, J, Kovnir, K
JournalCrystal Growth and Design
Volume18
Pagination4076-4083
Date Published07
Type of ArticleArticle
ISBN Number1528-7483
Accession NumberWOS:000438007200045
Keywordsba8cu16p30, chemistry, closed cavities, Crystallography, cu, earth, electronic-structure, Materials Science, phase, phosphides, re, room-temperature, thermoelectric properties
Abstract

ontent has a two-dimensional (2D) structural motif composed of Zn2P2 and La3P2 layers. A structural dimensionality reduction from 3D La2Zn11P9 to 2D La3Zn2-xP4 to 1D La7Zn2P11 is due to both the flexibility of the Zn-P framework with ZnP4 tetrahedra and ZnP3 planar building units and the ability of phosphorus to form homonuclear bonds and polyatomic phosphorus chains. A polycrystalline sample La3Zn1.75P4 was purified by a high-temperature solid-state method. The electron counting rules and computations predict the n-type metallic nature of La3Zn1.75P4. The transport properties tests performed on a sintered pellet of La3Zn1.75P4 confirm its metallic behavior with negative thermopower indicating that the major carriers are electrons. La3Zn1.75P4 exhibits moderate thermal conductivity, 4.5 W m(-1) K-1 at 300 K, where lattice thermal conductivity has the dominating contributions.

DOI10.1021/acs.cgd.8b00445
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Short TitleCryst. Growth Des.
Alternate JournalCryst. Growth Des.