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Normandite Mineral Data

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General Normandite Information

Help on Chemical  Formula: Chemical Formula: NaCa(Mn++,Fe++)(Ti,Nb,Zr)Si2O7(O,F)2
Help on Composition: Composition: Molecular Weight = 385.62 gm
   Sodium      5.96 %  Na    8.04 % Na2O
   Calcium    10.39 %  Ca   14.54 % CaO
   Zirconium   2.37 %  Zr    3.20 % ZrO2
   Titanium    7.45 %  Ti   12.43 % TiO2
   Manganese  10.68 %  Mn   13.80 % MnO
   Niobium     7.23 %  Nb   10.34 % Nb2O5
   Iron        3.62 %  Fe    4.66 % FeO
   Silicon    14.57 %  Si   31.16 % SiO2
   Oxygen     35.27 %  O
   Fluorine    2.46 %  F     2.46 % F
                -   %   F    -1.04 % -O=F2    
             ______        ______ 
             100.00 %       99.59 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: NaCaMn2+0.75Fe2+0.25Ti0.6Nb0.3Zr0.1(Si2O7)O1.5F0.5
Help on Environment: Environment: In miarolitic cavities in nepheline syenite.
Help on IMA Status: IMA Status: Approved IMA 1997 (Dana # Added)
Help on Locality: Locality: The Prudrette Quarry, Mont Saint-Hilaire, Rouville County, Quebec, Canada. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For Mr. Charles Normand (1963-), of Montreal, who discovered the mineral.
Help on Name Pronunciation: Name Pronunciation: Normandite + Pronunciation Say NORMANDITE
Help on Synonym: Synonym: ICSD 89860
  PDF 51-1537

Normandite Image

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Comments: Divergent acicular normandite crystals in pegmatite.
Location: Mount Partomchorr, Khibiny Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Normandite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.106:1:0.7205
Help on Cell Dimensions: Cell Dimensions: a = 10.828, b = 9.79, c = 7.054, Z = 4; beta = 108.2° V = 710.36 Den(Calc)= 3.61
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.859(1), 2.807(0.7), 3.234(0.3),

Physical Properties of Normandite

Help on Cleavage: Cleavage: {100} Distinct, {001} Distinct
Help on Color: Color: Yellow, Orange brown, Orange.
Help on Density: Density: 3.48 - 3.5, Average = 3.49
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 5-6 - Between Apatite and Orthoclase
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Adamantine
Help on Streak: Streak: pale yellowish white

Optical Properties of Normandite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.033 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.066 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2159,KPDmeas= 0.2233,KC= 0.231
Ncalc = 1.8 - 1.83
Help on Optical Data: Optical Data: Biaxial (-), a=1.743, b=1.785, g=1.81, bire=0.0670, 2V(Calc)=72, 2V(Meas)=72 -84. Dispersion r > v moderate.
Help on Pleochroism (x): Pleochroism (x): pale yellow.
Help on Pleochroism (y): Pleochroism (y): yellow.
Help on Pleochroism (z): Pleochroism (z): brownish red or deep red.

Calculated Properties of Normandite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.37 gm/cc
note: Specific Gravity of Normandite =3.49 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PENormandite = 20.77 barns/electron
U=PENormandite x rElectron Density= 70.01 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Normandite is Not Radioactive

Normandite Classification

Help on  Dana Class: Dana Class: 56.02.06a.02 (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O
  (56.02)with cations in [4] and/or >[4] coordination
  (56.02.06a)Seidozerite - Lamprophyllite group
56.02.06a.01 Seidozerite (Na,Ca)2(Zr,Ti,Mn)2Si2O7(O,F)2 P 2/c 2/m
56.02.06a.02 Normandite! NaCa(Mn,Fe)(Ti,Nb,Zr)Si2O7(O,F)2 P 21/a 2/m
56.02.06a.03 Grenmarite! (Zr,Mn)2(Zr,Ti)(Mn,Na)(Na,Ca)4(Si2O7)2(O,F)4 P 2/c 2/m
Help on  Strunz Class: Strunz Class: 09.BE.17 09 - SILICATES (Germanates)
  09.B - Sorosilicates
  09.BE -Si2O7 groups with additional anions;
09.BE.17 Baghdadite Ca3(Zr,Ti)Si2O9 P 21/a 2/m
09.BE.17 Janhaugite (Na,Ca)3(Mn,Fe)3(Ti,Zr,Nb)2Si4O15(OH,F,O)3 P 21/n 2/m
09.BE.17 Burpalite Na2CaZrSi2O7F2 P 21/a 2/m
09.BE.17 Cuspidine Ca4Si2O7(F,OH)2 P 21/c 2/m
09.BE.17 Hiortdahlite (Ca,Na,Y)3(Zr,Ti)Si2O7(F,O,OH)2 P1 1
09.BE.17 Lavenite (Na,Ca)2(Mn,Fe)(Zr,Ti,Nb)Si2O7(O,OH,F) P 21/a 2/m
09.BE.17 Niocalite Ca14Nb2(Si2O7)4O6F2 Pa m
09.BE.17 Normandite! NaCa(Mn,Fe)(Ti,Nb,Zr)Si2O7(O,F)2 P 21/a 2/m
09.BE.17 Wohlerite NaCa2(Zr,Nb)Si2O7(O,OH,F)2 P 21/m 2/m
09.BE.17 Marianoite! Na2Ca4(Nb,Zr)2(Si2O7)2(O,F)4 P 21 2/m

Other Normandite Information

Help on References: References: NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.83,p655,1998) OPTIC PROP.(MinRec)
Help on See Also: See Also: Links to other databases for Normandite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - EUROmin Project
6 - Ecole des Mines de Paris
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: 56.02.06a.02 Strunz No: 09.BE.17





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