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The largest documented single crystal of fluorite was a cube 2.12 meters in size and weighing approximately 16 tonnes. [23] Fluorite on barite from the Berbes mine, Ribadesella, Asturias (Spain). Fluorite crystal, 2.2 cm. In Asturias there are several fluorite deposits known internationally for the quality of the specimens they have yielded
Calcium fluoride is a classic example of a crystal with a fluorite structure. Crystallographic information can be collected via x-ray diffraction, providing information on the locations of electron density within a crystal structure. Using modern software such as Olex2, [4] one can solve a crystal structure from crystallographic output files.
Crystal of titanite with adularia and minor clinochlore on matrix Fluorite crystal sitting beside a glassy, dark green tourmaline crystal, which itself sits atop a green tourmaline of a lighter color. All sit on a bed of sparkly, bladed stark white albite Crystals of turquoise, from Copper Cities Mine, Globe-Miami District, Arizona, USA
A category for compounds with the same crystal structure as calcium fluoride (fluorite), or the structure of magnesium silicide (anti-fluorite). This category is also known by the Strukturbericht designation C1, and falls under the space group Fm 3 m (No. 225).
Bowl made from Derbyshire Blue John, on display in Castleton Visitor Centre French candelabra crafted of Blue John, c. 1860. Blue John (also known as Derbyshire Spar) is a semi-precious mineral, a rare form of fluorite with bands of a purple-blue or yellowish colour.
Calcite. Manganoan calcite (var.); Caledonite; Canasite; Cancrinite. Vishnevite; Carletonite; Carnallite; Cassiterite; Catapleiite; Cavansite; Celestite; Ceruleite ...
Fluorite crystals. Fluorine is estimated to be the 13th-most abundant element in Earth's crust and is widely dispersed in nature, entirely in the form of fluorides. The vast majority is held in mineral deposits, the most commercially important of which is fluorite (CaF 2). [4]
The same crystal structure is found in numerous ionic compounds with formula AB 2, such as ceria (CeO 2), zirconia (cubic ZrO 2), uranium dioxide (UO 2). In the corresponding anti-structure , called the antifluorite structure, anions and cations are swapped, such as beryllium carbide (Be 2 C) or lithium oxide (Li 2 O), potassium sulfate (K 2 SO ...
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