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Fluor-liddicoatite [7] is a rare member of the tourmaline group of minerals, elbaite subgroup, and the theoretical calcium endmember of the elbaite-fluor-liddicoatite series; the pure end-member has not yet been found in nature. [3] Fluor-liddicoatite is indistinguishable from elbaite by X-ray diffraction techniques.
Elbaite forms three series, with dravite, with fluor-liddicoatite, and with schorl. Due to these series, specimens with the ideal endmember formula are not found occurring naturally. As a gemstone, elbaite is a desirable member of the tourmaline group because of the variety and depth of its colours and quality of the crystals.
The name dravite was used for the first time by Gustav Tschermak (1836–1927), Professor of Mineralogy and Petrography at the University of Vienna, in his book Lehrbuch der Mineralogie (published in 1884) for magnesium-rich (and sodium-rich) tourmaline from village Dobrova near Unterdrauburg in the Drava river area, Carinthia, Austro-Hungarian ...
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cristaux de tourmaline var. liddicoatite, cristaux de quartz, cristaux de feldspath - crystals of tourmaline var. liddicoatite, crystals of quartz, crystals of feldspar; Author: Géry PARENT: Orientation: Normal: Horizontal resolution: 300 dpi: Vertical resolution: 300 dpi: Software used: Adobe Photoshop Elements 9.0 Macintosh: File change date ...
6. Bottled Water. While it might seem like a stretch to call the entire bottled water industry a scam … it kinda is. Most bottled water companies simply take municipal water and filter it for ...
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Plastics are used in most containers and packaging materials; in most of the fabrics that make clothing, bedding, carpeting, and towels; in the construction of buildings and motor vehicles; and in ...