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Automation of a Filmscanner for Evaluation of Guinier Films and Applications to Determination of Diffraction Data of Pb2Sr2Ho0.625Ca0.375Cu3O8 and Measurement of Thermal Expansion of GeO2

Published online by Cambridge University Press:  10 January 2013

Jens-Erik Jørgensen
Jens-Erik Jørgensen
Affiliation:
Department of Chemistry, Aarhus University, DK-8000 Aarhus C, Denmark
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Abstract

A previously manually operated film comparator used to evaluate Guinier films has been automated as a film scanner of the flat film type. The film movement is controlled by a stepper motor and the intensity of the transmitted light is recorded as a function of position on the film. A personal computer controls the stepper motor and records the measurements of the transmitted light intensity. The data quality is judged from refinements of lattice constants for α-SiO2 and ZrO2. The powder pattern for Pb2Sr2Ho0.625Ca0.375Cu3O8 and a high temperature study of the thermal expansion of GeO2 are presented.

Type
Research Article
Information
Powder Diffraction , Volume 6 , Issue 2 , June 1991 , pp. 82 - 84
Copyright
Copyright © Cambridge University Press 1991

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