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New Crystal Data for High Temperature Hexagonal Silver Sulfate

Published online by Cambridge University Press:  10 January 2013

Norberto Masciocchi  and
William Parrish
Norberto Masciocchi
Affiliation:
IBM Almaden Research Center, 650 Harry Road, San Jose, California 95120-6099, U.S.A.
William Parrish
Affiliation:
IBM Almaden Research Center, 650 Harry Road, San Jose, California 95120-6099, U.S.A.
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Abstract

Powder data for Ag2SO4were obtained with a conventional diffractometer equipped with a vacuum heating chamber. The transition from the low-temperature orthorhombic phase occurs over a temperature range of about 415° to 425°C and forms a hexagonal phase plus metallic silver. The lack of a sharp transition must be taken into account in high-temperature X-ray diffraction or DSC/DTA studies. The lattice parameters of the high-temperature hexagonal phase are a = 5.531(3), c = 7.456(5)Å at 440°C, λ = 1.540562 Å. Crystal structure determination was not completed because of uncertainty in the chemical composition.

Type
Research Article
Information
Powder Diffraction , Volume 5 , Issue 1 , March 1990 , pp. 50 - 52
Copyright
Copyright © Cambridge University Press1990

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