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Argillaceous minerals

Fine-grained (less than 2 μm) aluminosilicates (phyllosilicates)

Pronunciation
/ˌɑrʤəˈleɪʃəs ˈmɪnərəlz/
/ˌɑːʤɪˈleɪʃəs ˈmɪnərəlz/
Categories
mineral