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Fluor-liddicoatite is isostructural with (has the same structure as) all members of the tourmaline group, [3] which are cyclosilicates with the general formula XY 3 Z 6 (BO 3) 3 Si 6 O 18 (OH,O) 3 (OH,F). For fluor-liddicoatite, the X sites are occupied by Ca, the Y sites by Li or Al and the Z sites by Al, giving the formula Ca(Li 2 Al)Al 6 (BO ...
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.
Zabuyelite is the natural mineral form of lithium carbonate, with a formula Li 2 C O 3.It was discovered in 1987 at Lake Zabuye, Tibet, after which it is named.It forms colorless vitreous monoclinic crystals.
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Lepidolite is a lilac-gray or rose-colored member of the mica group of minerals with chemical formula K(Li,Al) 3 (Al,Si,Rb) 4 O 10 (F,OH) 2. [2] [3] It is the most abundant lithium-bearing mineral [4] and is a secondary source of this metal.
Dispersion: 0.017 [1]: Ultraviolet fluorescence: Pink stones; inert to very weak red to violet in long and short wave [1]: Absorption spectra: Strong narrow band at 498 nm, and almost complete absorption of red down to 640 nm in blue and green stones; red and pink stones show lines at 458 and 451 nm, as well as a broad band in the green spectrum [1]
Colors include shades of raspberry red to orange-red and pink.Recovered from miarolitic cavities in the granitic pegmatite fields of Fianarantsoa province, southern Madagascar, the pezzottaite crystals were small—no more than about 7 cm (2.8 in) in their widest dimension—and tabular or equant in habit, and few in number, most being heavily included with growth tubes and liquid feathers.