Mineralogy Database

Scapolite Mineral Data

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General Scapolite Information

Help on Chemical  Formula: Chemical Formula: (Na,Ca)4[Al3Si9O24]Cl
Help on Composition: Composition: Molecular Weight = 877.08 gm
   Sodium     5.24 %  Na    7.07 % Na2O
   Calcium    9.14 %  Ca   12.79 % CaO
   Aluminum  15.38 %  Al   29.06 % Al2O3
   Silicon   22.42 %  Si   47.95 % SiO2
   Chlorine   4.04 %  Cl    4.04 % Cl
               -   %   Cl   -0.91 % -O=Cl2   
   Oxygen    43.78 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na2Ca2Al5Si7O24Cl
Help on IMA Status: IMA Status: Not Approved IMA
Help on Locality: Locality: Otter Lake, Canada. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named in 1800 rom the Greek skapos - "rod" and lithos - "stone."
Help on Name Pronunciation: Name Pronunciation: Scapolite + Pronunciation Say SCAPOLITE
Help on Synonym: Synonym: Wernerite

Scapolite Image

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Comments: Violet colored, gemmy crystal of Scapolite, with upper terminations.
Location: Dodoma, Tanzania. Scale: 1 x 0.5 cm.
© Fabre Minerals

Scapolite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.62904
Help on Cell Dimensions: Cell Dimensions: a = 12.05, c = 7.58, Z = 2; V = 1,100.64 Den(Calc)= 2.65
Help on Crystal System: Crystal System: Tetragonal - Dipyramidal H-M Symbol (4/m) Space Group: P 41/n
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.46(1), 3.07(0.7), 3.03(0.6),3.82(0.6), 1.912(0.3), 2.69(0.3), 2.7(0.3), 6.04(0.2),
Help on Forms: Forms:

Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

Forms: ( 1 0 0) ( 3 1 1) ( 1 1 1) ( 1 1 0)

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Physical Properties of Scapolite

Help on Cleavage: Cleavage: {100} Distinct, {110} Distinct
Help on Color: Color: White, Gray, Pale brown, Pink, Yellow.
Help on Density: Density: 2.56 - 2.77, Average = 2.66
Help on Fracture: Fracture: Splintery - Thin, elongated fractures produced by intersecting good cleavages or partings (e.g. hornblende).
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 6 - Orthoclase
Help on Luminescence: Luminescence: Fluorescent.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Scapolite

Help on Dichroism (e): Dichroism (e): colorless.
Help on Dichroism (w): Dichroism (w): colorless.
Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.016 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.01 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2108,KPDmeas= 0.2096,KC= 0.213
Ncalc = 1.55 - 1.59
Help on Optical Data: Optical Data: Uniaxial (-), e=1.522-1.571, w=1.534-1.607, bire=0.0120-0.0360.

Calculated Properties of Scapolite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.62 gm/cc
note: Specific Gravity of Scapolite =2.65 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEScapolite = 2.78 barns/electron
U=PEScapolite x rElectron Density= 7.30 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Scapolite is Not Radioactive

Scapolite Classification

Help on  Dana Class: Dana Class: (76)Tectosilicate Al-Si Framework
  (76.03)with other Be/Al/Si frameworks
  (76.03.01)Scapolite group Scapolite* (Na,Ca)4[Al3Si9O24]Cl P 41/n 4/m Marialite Na4Al3Si9O24Cl I 4/m 4/m Meionite Ca4Al6Si6O24CO3 P 4/m 4/m Silvialite! (Ca,Na)4Al6Si6O24(SO4,CO3) I 4/m 4/m
Help on  Strunz Class: Strunz Class: 09.FB.15 09 - SILICATES (Germanates)
  09.F - Tektosilicates without Zeolitic H2O
  09.FB -Tektosilicates with additional anions
09.FB.15 Meionite Ca4Al6Si6O24CO3 P 4/m 4/m
09.FB.15 Marialite Na4Al3Si9O24Cl I 4/m 4/m
09.FB.15 Scapolite* (Na,Ca)4[(Al,Si)12O24]Cl P 41/n 4/m
09.FB.15 Silvialite! (Ca,Na)4Al6Si6O24(SO4,CO3) I 4/m 4/m

Other Scapolite Information

Help on References: References: NAME( Mason68) PHYS. PROP.(Mason68) OPTIC PROP.(Heinrich65)
Help on See Also: See Also: Links to other databases for Scapolite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - CalTech Mineral Spectroscopy
5 - Franklin Minerals(Palache)
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - HyperPhysics
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - Scandinavian mineral gallery
16 - Tradeshop.com - The Rainbow of Gems
17 - UCLA - Petrography Thin-Sections

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Dana No: Strunz No: 09.FB.15





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