Biotite mineral samples. This phyllosilicate mineral contains potassium, iron and magnesium, as well as fluorides, within an aluminosilicate lattice. It forms crystalline sheets and flakes, and is usually a greenish dark brown. Here, flakes of pure biotite have been laid out on a sheet of paper, and a ruler (bottom right) is shown for scale.
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Creative#:
TOP07421796
Source:
達志影像
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RM
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須由TPG 完整授權
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