The dehydroxylation reactions of three 2: 1 layer type clay minerals, illite, vermiculite and chlorite and the measurement of relative thermal energies involved in the process have been reported. © 1972 Taylor and Francis Group, LLC.

M ADHIKARI

M K MAJUMDAR

University of Calcutta (informally known as Calcutta University or CU) is a collegiate public state university located in Kolkata, West Bengal, India.&nbsp;Within India it is recognized as a &quot;Five-Star University&quot; and accredited &quot;A&quot; Grade by National Assessment and Accreditation Council.

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The University of Calcutta has secured the Fifth position among the Universities of India in the prestigious &quot;Indian University Ranking 2019&quot; list, released by the NIRF of the Ministry of Human Resource Development, Government of India.

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It was established on 24 January 1857, and was one of the first institutions in Asia to be established as a multidisciplinary and Western-style university. Its alumni and faculty include several heads of state, heads of government, social reformers, prominent artists, only academy award winner and Dirac medal winner in India, many Fellows of the Royal Society and five Nobel laureates as of 2019 which is highest in South Asia.

University Of Calcutta

Energy Changes in Dehydroxylation of Silicate Minerals

Transactions of the Indian Ceramic Society

The X-ray, DTGA and chemical analyses of clay fractions isolated from alluvial soil clays (pond sediments) were carried out. The results indicated the presence of illite (2: Mical type) as the dominant clay mineral with traces of kaolinite. The X-ray basal spacings and the DTGA peak temperatures were observed to be lower than the standard samples (cf. fithian illite). The molar ratios of SiO2/Al2O3 were also found be lower. All these indicated the presence of minerals (cf. kaolinite) other than illite as the only constituent. © 1978, Taylor &amp; Francis Group, LLC.

Journal	Transactions of the Indian Ceramic Society
Publisher	-
ISSN	0371-750X