Accession Number:

ADA275178

Title:

Crystallization of Silver Chromate from Ethanol Via Salt Metathesis Reactions of Solubilized Precursors

Descriptive Note:

Technical rept. 1 Jun-31 Aug 1993

Corporate Author:

OREGON UNIV EUGENE DEPT OF CHEMISTRY

Personal Author(s):

Report Date:

1993-10-14

Pagination or Media Count:

3.0

Abstract:

Admixture of aqueous solutions of silver nitrate and potassium chromate results in immediate precipitation of silver chromate as a red-brown microcrystalline powder, while addition of aqueous silver nitrate solution to a solution of potassium chromate18-crown-6 in ethanol gives a bright-red precipitate. X-ray powder diffraction shows both materials to be orthorhombic silver chromate. The ethanol-derived sample displays broader diffraction peaks, suggesting smaller crystallite size. Scanning electron microscopy confirms this. The ethanol-derived sample appears amorphous, while the aqueous sample displays well-faceted crystallites approximately 0.5 - 1 micron in size. Nonaqueous crystallization, Complexation-mediated crystallization.

Subject Categories:

  • Inorganic Chemistry
  • Physical Chemistry
  • Crystallography
  • Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE