Unusual chemical behavior for potassium under pressure: Potassium-silver compounds

T. Atou, M. Hasegawa, L. J. Parker, J. V. Badding

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

At high pressures, there are large changes in the size and electron concentration of the alkali metals. As a result, significant changes should occur in the solid-state chemistry of these elements, allowing the formation of alkali metal-transition metal compounds. The formation of two alkali metal-transition metal compounds, K3Ag and K2Ag, is reported. These compounds rapidly form at room temperature upon compression of stoichiometric mixtures of the elements. K3Ag has a BiF3-type structure related to the bcc structure of potassium, with silver replacing some of the bcc potassium sites. The anisotropic ω-phase structure of K2Ag consists of graphite-like layers of potassium atoms with silver atoms between the layers. At ambient pressure, lithium is the only alkali metal that forms compounds with silver. Thus, under pressure, potassium can exhibit chemical behavior exhibited by lithium at atmospheric pressure.

Original languageEnglish (US)
Pages (from-to)12104-12108
Number of pages5
JournalJournal of the American Chemical Society
Volume118
Issue number48
DOIs
StatePublished - Dec 1 1996

Fingerprint

Potassium Compounds
Silver Compounds
Silver compounds
Alkali Metals
Alkali metals
Potassium
Silver
Transition metal compounds
Pressure
Lithium
Metals
Atoms
Atmospheric Pressure
Graphite
Phase structure
Atmospheric pressure
Compaction
Electrons
Temperature

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

Cite this

Atou, T. ; Hasegawa, M. ; Parker, L. J. ; Badding, J. V. / Unusual chemical behavior for potassium under pressure : Potassium-silver compounds. In: Journal of the American Chemical Society. 1996 ; Vol. 118, No. 48. pp. 12104-12108.
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Unusual chemical behavior for potassium under pressure : Potassium-silver compounds. / Atou, T.; Hasegawa, M.; Parker, L. J.; Badding, J. V.

In: Journal of the American Chemical Society, Vol. 118, No. 48, 01.12.1996, p. 12104-12108.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Unusual chemical behavior for potassium under pressure

T2 - Potassium-silver compounds

AU - Atou, T.

AU - Hasegawa, M.

AU - Parker, L. J.

AU - Badding, J. V.

PY - 1996/12/1

Y1 - 1996/12/1

N2 - At high pressures, there are large changes in the size and electron concentration of the alkali metals. As a result, significant changes should occur in the solid-state chemistry of these elements, allowing the formation of alkali metal-transition metal compounds. The formation of two alkali metal-transition metal compounds, K3Ag and K2Ag, is reported. These compounds rapidly form at room temperature upon compression of stoichiometric mixtures of the elements. K3Ag has a BiF3-type structure related to the bcc structure of potassium, with silver replacing some of the bcc potassium sites. The anisotropic ω-phase structure of K2Ag consists of graphite-like layers of potassium atoms with silver atoms between the layers. At ambient pressure, lithium is the only alkali metal that forms compounds with silver. Thus, under pressure, potassium can exhibit chemical behavior exhibited by lithium at atmospheric pressure.

AB - At high pressures, there are large changes in the size and electron concentration of the alkali metals. As a result, significant changes should occur in the solid-state chemistry of these elements, allowing the formation of alkali metal-transition metal compounds. The formation of two alkali metal-transition metal compounds, K3Ag and K2Ag, is reported. These compounds rapidly form at room temperature upon compression of stoichiometric mixtures of the elements. K3Ag has a BiF3-type structure related to the bcc structure of potassium, with silver replacing some of the bcc potassium sites. The anisotropic ω-phase structure of K2Ag consists of graphite-like layers of potassium atoms with silver atoms between the layers. At ambient pressure, lithium is the only alkali metal that forms compounds with silver. Thus, under pressure, potassium can exhibit chemical behavior exhibited by lithium at atmospheric pressure.

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