Leucophanite

     Leucophanite is a really beryllium that is rare that has been first found in the mines of Langesundsfjord region of Norway, a classic mineral locality filled with rare minerals. It’s a known person in the Fresnoite Group of minerals. Leucophanite may fluoresce violet-blue or red in SW and LW UV and it is strongly phosphorescent. It normally pyroelectric, meaning it has the capacity to generate a potential that is electrical hot or cooled.   It could contain cerium substituting when you look at the calcium position.  It occurs in pegmatites and alkali igneous complexes as yellow, greenish or triclinic that is white and has now been present in Norway, Quebec, and Russia.  

     It absolutely was first described by the Langesundfiord district of southern Norway in 1840. The name is through the Greek Leucos for “white” and phanein for “to show up” in allusion to the common color this is certainly white  The four locations which can be main finding Leucophanite are the Langesundsfjord along with other locations in Norway; in Russia at the Lovozero massif, Kola Peninsula; from Narssârssuk, Greenland; and at Mont Saint-Hilaire, Quebec, Canada where some of the best specimens are found.

Chemical Formula:	CaNa2Be2Si4O12(F,OH)2
	Sodium Calcium Beryllium Silicate Hydroxide Fluoride
Molecular Weight:	235.92 gm
Composition:	Sodium 14.62 % Na 19.70 % Na2O Calcium 8.49 % Ca 11.88 % CaO Beryllium 3.82 % Be 10.60 % BeO Silicon 23.81 % Si 50.94 % SiO2 Hydrogen 0.90 % H 8.02 % H2O Oxygen 42.72 % O Fluorine 5.64 % F 5.64 % F —  — % F -2.37 %  -O=F2   100.00 % 100.00 % = TOTAL OXIDE

Crystallography:	Triclinic – Pedial
Crystal Habit:	Short prismatic to tabular pseudotetragonal crystals, to 3 cm. In radiating ¯brous spherulites; massive.
Twinning:	Penetration fourlings; polysynthetic || {110}

 

Cleavage:	{001}, Perfect; {100}, {010}, and {201}, Distinct
Fracture:	Irregular/Uneven, Conchoidal
Tenacity:	Very Brittle
Moh’s Hardness:	3.5 – 4.0
Density:	2.96 – 3.07 (g/cm3)
Luminescence:	May fluoresce pink or violet-blue in SW and LW UV; strongly phosphorescent
Radioactivity:	Not Radioactive

 

Color:	Whitish Green, Greenish White, deep Green with a Yellow tinge, Wine-Yellow
Transparency:	Semi-Transparent
Luster:	Vitreous
Refractive Index:	1.565 – 1.598  Biaxial ( – )
Birefringence:	0.027
Dispersion:	Weak; r > v