Mineralogy Database

Agrellite Mineral Data

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General Agrellite Information

Help on Chemical  Formula: Chemical Formula: NaCa2Si4O10F
Help on Composition: Composition: Molecular Weight = 394.48 gm
   Sodium     5.83 %  Na    7.86 % Na2O
   Calcium   20.32 %  Ca   28.43 % CaO
   Silicon   28.48 %  Si   60.93 % SiO2
   Oxygen    40.56 %  O
   Fluorine   4.82 %  F     4.82 % F
               -   %   F    -2.03 % -O=F2    
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: NaCa2(Si4O10)F
Help on Environment: Environment: Alkalic igneous rocks of the Sheffield Lake complex.
Help on IMA Status: IMA Status: Approved IMA 1976
Help on Locality: Locality: Kipawa River, Villieu Township, Temiscaming County, Quebec, Canada. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Stuart O. Agrell, British mineralogist, Cambridge University.
Help on Name Pronunciation: Name Pronunciation: Agrellite + Pronunciation Say AGRELLITE
Help on Synonym: Synonym: ICSD 100376
  PDF 41-1441

Agrellite Image

Click Here for Larger   Image in a New Browser Window Images:
Click Here for Larger   Image

  Agrellite   Eudialyte

Comments: Tan agrellite grain, with red eudialyte.
Location: Kipiwa Complex, Villedieu, Quebec, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Agrellite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.4095:1:0.3687
Help on Cell Dimensions: Cell Dimensions: a = 7.759, b = 18.946, c = 6.986, Z = 4; alpha = 89.88°, beta = 116.65°, gamma = 94.32° V = 915.25 Den(Calc)= 2.86
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.842(1), 3.203(0.84), 9.44(0.8),

Physical Properties of Agrellite

Help on Cleavage: Cleavage: {110} Perfect, {110} Perfect, {010} Poor
Help on Color: Color: White, Grayish white, Greenish white.
Help on Density: Density: 2.88 - 2.9, Average = 2.88
Help on Diaphaneity: Diaphaneity: Translucent
Help on Habit: Habit: Lath - Shaped like a small, thin plaster lath, tabular (rectangular) in shape.
Help on Hardness: Hardness: 5.5 - Knife Blade
Help on Luminescence: Luminescence: Fluorescent, Short UV=pink magenta, Long UV=bright pink.
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: white

Optical Properties of Agrellite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.022 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.011 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2013,KPDmeas= 0.1992,KC= 0.2036
Ncalc = 1.58 - 1.59
Help on Optical Data: Optical Data: Biaxial (-), a=1.567, b=1.579, g=1.581, bire=0.0140
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): colorless.
Help on Pleochroism (z): Pleochroism (z): colorless.

Calculated Properties of Agrellite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.84 gm/cc
note: Specific Gravity of Agrellite =2.86 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEAgrellite = 3.71 barns/electron
U=PEAgrellite x rElectron Density= 10.54 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Agrellite is Not Radioactive

Agrellite Classification

Help on  Dana Class: Dana Class: (70)Inosilicate Column or Tube Structures
  (70.01)with columnar silicate units
  (70.01.01)Litidionite group Litidionite KNaCuSi4O10 P1 1 Fenaksite (K,Na,Ca)4(Fe,Fe,Mn)2Si8O20(OH,F) P1 1 Manaksite KNaMnSi4O10 P1 1 Agrellite NaCa2Si4O10F P1 1
Help on  Strunz Class: Strunz Class: 09.DH.75 09 - SILICATES (Germanates)
  09.D - Inosilicates* Structural terminology according to Liebau (1985)
  09.DH -Inosilicates with 4-periodic single chains, Si4O12
09.DH.75 Agrellite NaCa2Si4O10F P1 1

Other Agrellite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Collectors Book of Fluorescent Minerals) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Agrellite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Dana No: Strunz No: 09.DH.75





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