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A Chlorite Convention for the Appraisal of Scottish Fireclays
1958
Clay minerals
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After CO,~ and C are allocated to carbonates and carbonaceous matter, FeO and MgO are allocated to a hypothetical "average" chlorite of composition 12(Fe, MgO). 3A12Oe. 7SiO~. 10H20, K20 is allocated to muscovite, remaining A120:~ to kaolinite, remaining SiO~ to quartz, calculated hydroxyls usually agree well with HzO+. Calculated mineral analyses agree well with practical assessment and thermal expansion curves. Chlorite and chlorite-illite are known to occur (X-rays) in this series of cIays.
doi:10.1180/claymin.1958.003.19.04
fatcat:vh32oe7k7fardekbgcv7tptvqq