Mineralogy Database

Lemoynite Mineral Data

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General Lemoynite Information

Help on Chemical  Formula: Chemical Formula: (Na,K)2CaZr2Si10O26•5-6(H2O)
Help on Composition: Composition: Molecular Weight = 1,075.15 gm
   Potassium   3.27 %  K     3.94 % K2O
   Sodium      2.35 %  Na    3.17 % Na2O
   Calcium     3.35 %  Ca    4.69 % CaO
   Zirconium  15.27 %  Zr   20.63 % ZrO2
   Niobium     0.86 %  Nb    1.24 % Nb2O5
   Iron        0.52 %  Fe    0.67 % FeO
   Silicon    26.12 %  Si   55.88 % SiO2
   Hydrogen    1.07 %  H     9.55 % H2O
   Oxygen     47.17 %  O
             ______        ______ 
             100.00 %       99.78 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na1.1K0.9Ca0.9Fe2+0.1Zr1.8Nb0.1Si10O26�5.7(H2O)
Help on Environment: Environment: In pegmatite in an intrusive alkalic gabbro-syenite complex.
Help on IMA Status: IMA Status: Approved IMA 1969
Help on Locality: Locality: Mont Saint-Hilaire, Quebec, Canada. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Charles Lemoyne (1625-1685), Lord of Longuevil, and his four sons, well-known personalites in French-Canadian history.
Help on Name Pronunciation: Name Pronunciation: Lemoynite + Pronunciation Say LEMOYNITE
Help on Synonym: Synonym: ICSD 60676
  PDF 24-1072

Lemoynite Image

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Comments: Yellowish white, radial, spherical spray of prismatic Lemoynite crystals to 5mm in diameter on matrix.
Location: Mont St. Hilaire, Quebec, Canada. Scale: Picture size 1 cm.
© Tom Loomis / Dakota Matrix

Lemoynite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.6488:1:1.1664
Help on Cell Dimensions: Cell Dimensions: a = 10.348, b = 15.947, c = 18.601, Z = 4; beta = 104.59° V = 2,970.55 Den(Calc)= 2.40
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 8.01(1), 3.562(0.49), 2.807(0.48),

Physical Properties of Lemoynite

Help on Cleavage: Cleavage: {001} Perfect, {010} Perfect, {001} Imperfect
Help on Color: Color: Yellowish white, Light blue.
Help on Density: Density: 2.29
Help on Diaphaneity: Diaphaneity: Transparent to Opaque
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Bladed - Aggregates of thin lath-like crystals (e.g. kyanite).
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Habit: Habit: Wheat Sheaf - Bundle shaped aggregates resembling wheat sheafs after hand reaping wheat.
Help on Hardness: Hardness: 4 - Fluorite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Lemoynite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.098 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.048 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.231,KPDmeas= 0.2421,KC= 0.2204
Ncalc = 1.5 - 1.53
Help on Optical Data: Optical Data: Biaxial (+), a=1.54, b=1.553, g=1.57, bire=0.0300, 2V(Calc)=84, 2V(Meas)=80.

Calculated Properties of Lemoynite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.37 gm/cc
note: Specific Gravity of Lemoynite =2.40 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PELemoynite = 23.09 barns/electron
U=PELemoynite x relectron= 54.73 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 46.65 (Gamma Ray American Petroleum Institute Units)
Concentration of Lemoynite per GRapi unit = 2.14 (%)

Estimated Radioactivity from Lemoynite - barely detectable


Lemoynite Classification

Help on  Dana Class: Dana Class: (74)Phyllosilicate Modulated Layers
  (74.03)with joined strips
  (74.03.03)Altisite/lemoynite Altisite Na3K6Ti2Al2Si8O26Cl3 C 2/m 2/m Lemoynite (Na,K)2CaZr2Si10O26•5-6(H2O) C 2/m 2/m Natrolemoynite! Na4Zr2Si10O26•9(H2O) C 2/m 2/m
Help on  Strunz Class: Strunz Class: 09.DP.35 09 - SILICATES (Germanates)
  09.D - Inosilicates* Structural terminology according to Liebau (1985)
  09.DP -Transitional ino-phyllosilicate structures
09.DP.35 Natrolemoynite! Na4Zr2Si10O26•9(H2O) C 2/m 2/m
09.DP.35 Lemoynite (Na,K)2CaZr2Si10O26•5-6(H2O) C 2/m 2/m

Other Lemoynite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(AntBidBlaNic2) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Lemoynite :
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 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info

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Dana No: Strunz No: 09.DP.35





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