Transmission electron microscopic study of early stage γ1 (Ag2Hg3) and β1 (Ag-Hg) phases

Technical note

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Incomplete reaction, residual free mercury, and high volatility of mercury are often major causes of the discrepancy in chemical composition of γ1 measured by different methods. The high mercury volatility also proves to be a major difficulty in transmission electron microscopy (TEM) study of high mercury materials. Provided in this report is a preparation method for TEM thin foils that can largely eliminate the mercury loss problem. The results show that the lattice constant of early stage γ1 crystals is 10.05Δ with a chemical composition of Ag 41.08Hg58.92 (or Ag2Hg2.87). The chemical composition data shows that little or no mercury is lost during specimen preparation. The lattice parameters, a and c, of β1 crystals are 3.01 and 4.88Δ, respectively with a chemical composition of Ag1.1Hg0.94. It seems that the present specimen preparation method allows for accurate TEM microanalysis of high mercury amalgam phases such as γ1 and β1, which has been extremely difficult to do in the past.

Original languageEnglish
Pages (from-to)422-424
Number of pages3
JournalDental Materials
Volume18
Issue number5
DOIs
Publication statusPublished - 2002 Aug 1

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Mercury
Electrons
Specimen preparation
Transmission electron microscopy
Chemical analysis
Lattice constants
Transmission Electron Microscopy
Volatilization
Mercury amalgams
Crystals
Mercury (metal)
Microanalysis
Metal foil
silver mercury amalgam

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Dentistry(all)
  • Mechanics of Materials

Cite this

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title = "Transmission electron microscopic study of early stage γ1 (Ag2Hg3) and β1 (Ag-Hg) phases: Technical note",
abstract = "Incomplete reaction, residual free mercury, and high volatility of mercury are often major causes of the discrepancy in chemical composition of γ1 measured by different methods. The high mercury volatility also proves to be a major difficulty in transmission electron microscopy (TEM) study of high mercury materials. Provided in this report is a preparation method for TEM thin foils that can largely eliminate the mercury loss problem. The results show that the lattice constant of early stage γ1 crystals is 10.05Δ with a chemical composition of Ag 41.08Hg58.92 (or Ag2Hg2.87). The chemical composition data shows that little or no mercury is lost during specimen preparation. The lattice parameters, a and c, of β1 crystals are 3.01 and 4.88Δ, respectively with a chemical composition of Ag1.1Hg0.94. It seems that the present specimen preparation method allows for accurate TEM microanalysis of high mercury amalgam phases such as γ1 and β1, which has been extremely difficult to do in the past.",
author = "Jiin-Huey Chern and Chen, {K. I.} and Chien-Ping Ju",
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Transmission electron microscopic study of early stage γ1 (Ag2Hg3) and β1 (Ag-Hg) phases : Technical note. / Chern, Jiin-Huey; Chen, K. I.; Ju, Chien-Ping.

In: Dental Materials, Vol. 18, No. 5, 01.08.2002, p. 422-424.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Transmission electron microscopic study of early stage γ1 (Ag2Hg3) and β1 (Ag-Hg) phases

T2 - Technical note

AU - Chern, Jiin-Huey

AU - Chen, K. I.

AU - Ju, Chien-Ping

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AB - Incomplete reaction, residual free mercury, and high volatility of mercury are often major causes of the discrepancy in chemical composition of γ1 measured by different methods. The high mercury volatility also proves to be a major difficulty in transmission electron microscopy (TEM) study of high mercury materials. Provided in this report is a preparation method for TEM thin foils that can largely eliminate the mercury loss problem. The results show that the lattice constant of early stage γ1 crystals is 10.05Δ with a chemical composition of Ag 41.08Hg58.92 (or Ag2Hg2.87). The chemical composition data shows that little or no mercury is lost during specimen preparation. The lattice parameters, a and c, of β1 crystals are 3.01 and 4.88Δ, respectively with a chemical composition of Ag1.1Hg0.94. It seems that the present specimen preparation method allows for accurate TEM microanalysis of high mercury amalgam phases such as γ1 and β1, which has been extremely difficult to do in the past.

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