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Okayamalite Image

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Mineral: Okayamalite: Ca2B2SiO7
Comments: Intergrowth between crystalline okayamalite (a) and amorphous silica (b). Okayamalite here forms regular lamellae elongated along [001], typically 400 Å thick. The grainy area (c) corresponds to the graphite film..
Location: Skarn sample from the Arendal district, Sorlandet, Norway. (AmMin, v85:1508).
Scale: See Image.
Copyright: © American Mineralogist
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