Английская Википедия:Clinozoisite
Clinozoisite is a complex calcium aluminium sorosilicate mineral with formula: Ca2Al3(Si2O7)(SiO4)O(OH). It forms a continuous solid solution series with epidote by substitution of iron(III) in the aluminium (m3 site) and is also called aluminium epidote.[1]
Clinothulite is a manganese bearing variety with a pinkish hue due to substitution of Mn(III) in the aluminium site.[2]
It was originally discovered in 1896 in East Tyrol, Austria, and is so-named because of its resemblance to zoisite and its monoclinic crystal structure.[1]
It occurs in rocks which have undergone low to medium grade regional metamorphism and in contact metamorphism of high calcium sedimentary rocks. It also occurs in saussurite alteration of plagioclase.[3]
Jadeite bearing pyroxene minerals have suggested clinozoisite and paragonite are associated and derived from lawsonite releasing quartz and water via the following reaction:[4]
<chem>4CaAl2Si2O8(H2O)2 + NaAlSi2O6 <=> 2Ca2Al3Si3O12(OH) + NaAl3Si3O10(OH)2 + SiO2 + 6H2O</chem>
References
- Nesse, William D., "Introduction to Mineralogy," (c)2000 Oxford University Press Шаблон:ISBN
- ↑ 1,0 1,1 Ошибка цитирования Неверный тег
<ref>; для сносокMindatне указан текст - ↑ Clinothulite on Mindat
- ↑ Ошибка цитирования Неверный тег
<ref>; для сносокHBMне указан текст - ↑ Шаблон:Cite book
- Английская Википедия
- Sorosilicates
- Epidote group
- Calcium minerals
- Aluminium minerals
- Monoclinic minerals
- Minerals in space group 11
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