File:Qemscan pisoliths.png

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DescriptionQemscan pisoliths.png	QEMSCAN cross-sectional image of pisoliths provided by courtesy of Intellection Pty. The QEMSCAN mineral map is emphasising that no two pisoliths are the same – although they generally have a nucleus and core which is then surrounded by several concentric layers. Pisoliths can form a bauxite ore, the main source of aluminium. Extraction of aluminium from the ore involves a complex chemical digestion technique known as the Bayer Process. The efficiency of this process is significantly reduced if impurities other than aluminium hydroxide (green) are present in the ore, such as quartz (pink), clays (brown) and iron oxides (orange) in the image.
Date	4 January 2011, 03:14 (UTC)
Source	FEI Company
Author	03:14, 04 January 2011 (UTC)

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	04:53, 4 January 2011		1,350 × 921 (499 KB)	David Haberlah (talk \| contribs)	== Summary == {{Information \|Description = QEMSCAN cross-sectional mineral map of pisoliths provided by courtesy of BHP Billiton to Intellection Pty.. The QEMSCAN image is emphasising that no two pisoliths are the same – although they ge

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