Lorenzenite is a rare sodium titanium silicate mineral with the formula Na2Ti2Si2O9 It is an orthorhombic mineral, variously found as colorless, grey, pinkish, or brown crystals.
It was first identified in 1897 in rock samples from Narsarsuk, Greenland.[3] In 1947 it was discovered to be the same as the mineral ramsayite (now a synonym of lorenzenite), discovered in the 1920s in the Kola peninsula of Russia. It is also found in northern Canada.
lorenzenite, rare, sodium, titanium, silicate, mineral, with, formula, na2ti2si2o9, orthorhombic, mineral, variously, found, colorless, grey, pinkish, brown, crystals, doubly, terminated, crystal, from, lovozero, massif, kola, peninsula, russiageneralcategorys. Lorenzenite is a rare sodium titanium silicate mineral with the formula Na2Ti2Si2O9 It is an orthorhombic mineral variously found as colorless grey pinkish or brown crystals LorenzeniteDoubly terminated crystal of Lorenzenite 2 5 cm tip to tip from Lovozero Massif Kola Peninsula RussiaGeneralCategorySilicate mineralFormula repeating unit Na2Ti2 O3 Si2O6 IMA symbolLrz 1 Strunz classification9 DB 10Crystal systemOrthorhombicCrystal classDipyramidal mmm H M Symbol 2 m 2 m 2 m Space groupPbcnUnit cella 8 71 b 5 23 c 14 48 A Z 4IdentificationColorPale purple brown pale pink to mauve brown to blackCrystal habitEquant bladed prismatic to needlelike crystals fibrous felted lamellar aggregatesCleavageDistinct good on 010 FractureIrregular unevenMohs scale hardness6LusterAdamantine vitreous sub metallic dullStreakWhite to pale brownDiaphaneityTransparent opaqueSpecific gravity3 42 3 45Optical propertiesBiaxial Refractive indexna 1 910 1 950 nb 2 010 2 040 ng 2 030 2 060Birefringenced 0 120PleochroismWeak2V angleMeasured 38 to 41 Ultraviolet fluorescencePale yellow to dull green under SW UVReferences 2 3 4 It was first identified in 1897 in rock samples from Narsarsuk Greenland 3 In 1947 it was discovered to be the same as the mineral ramsayite now a synonym of lorenzenite discovered in the 1920s in the Kola peninsula of Russia It is also found in northern Canada It occurs in nepheline syenites and pegmatites in association with aegirine nepheline microcline arfvedsonite elpidite loparite eudialyte astrophyllite mangan neptunite lavenite rinkite apatite titanite and ilmenite 2 It was named in honor of Danish mineralogist Johannes Theodor Lorenzen 1855 1884 3 References edit Warr L N 2021 IMA CNMNC approved mineral symbols Mineralogical Magazine 85 3 291 320 Bibcode 2021MinM 85 291W doi 10 1180 mgm 2021 43 S2CID 235729616 a b Handbook of Mineralogy a b c Mindat Webmineral nbsp Wikimedia Commons has media related to Lorenzenite nbsp This article about a specific silicate mineral is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Lorenzenite amp oldid 1136998539, wikipedia, wiki, book, books, library,
