Quartz crystallographic data

Crystallographic Data. Debye-SchErreb photographs were obtained, using CuKx radiation from a graphite crystal monochromator. All samples Were sealed in thin- valled quartz capillaries. 

The quartz, albite and anorthite samples underwent dissolution, often along preferred crystallographic directions to form etch pits visible by SEM. The phyllosilicate reactants were too fine grained for any dissolution textures to be visible by SEM. New calcium aluminosilicate phases precipitated abundantly in the anorthite, chlorite and muscovite samples. The resolution of the SEM analytical facility was not sufficiently high to obtain quantitative chemical data for these phases, whereas good quality chemical data were obtained for them by ATEM (Tables 3 and 4). 

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