Saha , M R and Das, S N and Dasgupta, S (1994) A chemical method for separation of amorphous silica from quartz and subsequent determination of the quartz phase. Glass Technology, 35 (3). pp. 141-144. ISSN 0017-1050

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Abstract

A new method is presented for the chemical separation of amorphous silica from free silica (quartz phase) and the subsequent determination of the latter. The mixture of the two phases of silica was treated with 1.5% HF at a temperature of less-than-or-equal-to 15-degrees-C for 5 min and thereafter the adverse effect of hydrofluoric acid was inhibited by adding a saturated solution of boric acid. The insoluble residue of quartz was filtered and determined by following the conventional method of hydrorfluorisation. Knowledge of the quartz content in ceramic raw materials is essential in making refractory blocks for glass tank furnaces, vitreous tablewares, etc. The merit of the method is judged by its simplicity and the reproducibility of the results as shown by the standard deviation.

Item Type:	Article
Subjects:	Crystal Chemistry, Thermodynamics, Phase Equilibria
Divisions:	UNSPECIFIED
Depositing User:	Bidhan Chaudhuri
Date Deposited:	08 Aug 2013 13:25
Last Modified:	08 Aug 2013 13:25
URI:	http://cgcri.csircentral.net/id/eprint/1983

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