Normandite has a chemical formula of NaCa(Mn2+,Fe2+)(Ti,Nb,Zr)Si2O7(O,F)2. It crystallizes in the monoclinic-prismatic crystal system. It occurs as transparent to translucent orange-brown aggregates of subparallel acicular crystals up to 10 mm in length, and as patches of yellow, fibrous crystals. It has a white to very pale yellow streak and vitreous luster. It is brittle, with distinct {100} and {001} cleavages, and a conchoidal fracture. It has a specific gravity of 3.48 to 3.5, a Mohs hardness of 5 to 6 and refractive index values of nα=1.743, nβ=1.785 and nγ=1.810. It is named after Charles Normand (born 1963), Canadian geologist.
^Perchiazzi, N.; McDonald, A. M.; Gault, R. A.; Johnsen, O.; Merlino, S. (1 June 2000). "The Crystal Structure of Normandite and Its Crystal-Chemical Relationships With Lavenite". The Canadian Mineralogist. 38 (3): 641–648. doi:10.2113/gscanmin.38.3.641.
Webmineral data
Mindat with location data
Saint-Hilaire
The Canadian Mineralogist 1999 abstract
August 21, 2023
normandite, brittle, orange, brown, sorosilicate, mineral, discovered, 1997, charles, normand, born, 1963, montreal, occurs, khibiny, massif, kola, russia, poudrette, quarry, mont, saint, hilaire, quebec, type, locality, tenerife, canary, islands, found, nephe. Normandite is a brittle orange brown sorosilicate mineral discovered in 1997 by Charles Normand born 1963 of Montreal Normandite occurs in Khibiny Massif Kola Russia in Poudrette quarry Mont Saint Hilaire Quebec type locality and Tenerife Canary Islands It is found in nepheline syenite and in miarolitic cavities in nepheline syenite associated with nepheline albite microcline aegirine natrolite catapleiite kupletskite eudialyte cancrinite villiaumite rinkite and donnayite Y NormanditeGeneralCategoryMineralFormula repeating unit NaCa Mn2 Fe2 Ti Nb Zr Si2O7 O F 2IMA symbolNmd 1 Crystal systemMonoclinicSpace groupP21 a no 14 IdentificationMohs scale hardness5 6Specific gravity3 48 3 5References 2 Normandite has a chemical formula of NaCa Mn2 Fe2 Ti Nb Zr Si2O7 O F 2 It crystallizes in the monoclinic prismatic crystal system It occurs as transparent to translucent orange brown aggregates of subparallel acicular crystals up to 10 mm in length and as patches of yellow fibrous crystals It has a white to very pale yellow streak and vitreous luster It is brittle with distinct 100 and 001 cleavages and a conchoidal fracture It has a specific gravity of 3 48 to 3 5 a Mohs hardness of 5 to 6 and refractive index values of na 1 743 nb 1 785 and ng 1 810 It is named after Charles Normand born 1963 Canadian geologist 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 Perchiazzi N McDonald A M Gault R A Johnsen O Merlino S 1 June 2000 The Crystal Structure of Normandite and Its Crystal Chemical Relationships With Lavenite The Canadian Mineralogist 38 3 641 648 doi 10 2113 gscanmin 38 3 641 Webmineral data Mindat with location data Saint Hilaire The Canadian Mineralogist 1999 abstract Retrieved from https en wikipedia org w index php title Normandite amp oldid 1140326904, wikipedia, wiki, book, books, library,
