Platinum Bronzes. IV. Preparation, Crystal Chemistry, and Physical Properties

David Cahen*, James A Ibers, J. Bruce Wagner

*Corresponding author for this work

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

The syntheses of several ternary platinum oxides are reported. The Na and Cd bronzes Na x Pt 3 O 4 and Cd x Pt 3 O 4 as well as the bronze-like CaPt 2 O 4 were prepared in powder form under atmospheric pressure. The existence of Pt 3 O 4 is discussed. Syntheses for Cd x Pt 3 O 6 and a poorly defined new simple oxide of platinum with stoichiometry Pt 5 O 6 are given. The stability of these various oxides is discussed and their lattice parameters are given. The crystal chemistry of these oxides is systematized using stability fields for the platinum bronzes and for A 3 BX 4 compounds. The close structural relationship between the bronzes and Ag 3 PO 4 and Ag 3 AsO 4 is discussed. Photoelectron spectroscopic, magnetic susceptibility, and electrical conductivity data for the bronzes and various other platinum oxides are reported. From these data it is concluded that most bronzes are metallic oxides and a qualitative one-electron energy-band scheme is given explaining this metallic character. The nonexistence of CaPt 3 O 4 is discussed in terms of both this scheme and thermodynamics. The tendency of the bronzes to incorporate large quantities of foreign cations is explained in terms of the cage-like bronze structure.

Original languageEnglish (US)
Pages (from-to)1377-1388
Number of pages12
JournalInorganic chemistry
Volume13
Issue number6
DOIs
StatePublished - Jun 1 1974

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Crystal chemistry
Bronze
bronzes
Platinum
platinum
Physical properties
physical properties
chemistry
preparation
crystals
platinum oxides
Oxides
oxides
synthesis
Photoelectrons
Magnetic susceptibility
Stoichiometry
Band structure
Powders
Atmospheric pressure

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

Cite this

Cahen, David ; Ibers, James A ; Wagner, J. Bruce. / Platinum Bronzes. IV. Preparation, Crystal Chemistry, and Physical Properties. In: Inorganic chemistry. 1974 ; Vol. 13, No. 6. pp. 1377-1388.
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Platinum Bronzes. IV. Preparation, Crystal Chemistry, and Physical Properties. / Cahen, David; Ibers, James A; Wagner, J. Bruce.

In: Inorganic chemistry, Vol. 13, No. 6, 01.06.1974, p. 1377-1388.

Research output: Contribution to journalArticle

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AB - The syntheses of several ternary platinum oxides are reported. The Na and Cd bronzes Na x Pt 3 O 4 and Cd x Pt 3 O 4 as well as the bronze-like CaPt 2 O 4 were prepared in powder form under atmospheric pressure. The existence of Pt 3 O 4 is discussed. Syntheses for Cd x Pt 3 O 6 and a poorly defined new simple oxide of platinum with stoichiometry Pt 5 O 6 are given. The stability of these various oxides is discussed and their lattice parameters are given. The crystal chemistry of these oxides is systematized using stability fields for the platinum bronzes and for A 3 BX 4 compounds. The close structural relationship between the bronzes and Ag 3 PO 4 and Ag 3 AsO 4 is discussed. Photoelectron spectroscopic, magnetic susceptibility, and electrical conductivity data for the bronzes and various other platinum oxides are reported. From these data it is concluded that most bronzes are metallic oxides and a qualitative one-electron energy-band scheme is given explaining this metallic character. The nonexistence of CaPt 3 O 4 is discussed in terms of both this scheme and thermodynamics. The tendency of the bronzes to incorporate large quantities of foreign cations is explained in terms of the cage-like bronze structure.

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