Scapolite Mineral Data + Say SCAPOLITE

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General Scapolite Information

Help on Chemical  Formula: Chemical Formula: (Na,Ca)4[Al3Si9O24]Cl
Help on Composition: Composition: Molecular Weight = 879.29 gm
   Sodium     5.23 %  Na    7.05 % Na2O
   Calcium    9.12 %  Ca   12.76 % CaO
   Aluminum   9.21 %  Al   17.39 % Al2O3
   Silicon   28.75 %  Si   61.50 % SiO2
   Chlorine   4.03 %  Cl    4.03 % Cl
               -   %  Cl   -0.91 % -O=Cl2
   Oxygen    43.67 %  O
            ______        ______ 
            100.00 %      101.82 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na2Ca2Al3Si9O24Cl
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 Synonym: Synonym: Wernerite
 

Scapolite Image

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Scapolite

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 - DipyramidalH-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:

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Forms: [ 1 0 0] [ 3 1 1] [ 1 1 1] [ 1 1 0]

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Click Here for Large Scapolite Structure Window Crystal Structure:

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Levien L , Papike J J , American Mineralogist , 61 (1976) p.864-877, Scapolite crystal chemistry: Aluminum-silicon distributions, carbonate group, disorder, and thermal expansion, before heating

View Additional jPOWD Structure files for Scapolite
[1] [2] [3] [4] [5] [6] [7] [8]
 

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= 0.034 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.028 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2108,KPDmeas= 0.2096,KC= 0.2168
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:

relectron=2.63 gm/cc
note: rScapolite =2.65 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.01375
Boson Index = 0.98625
Help on Photoelectric: Photoelectric:

PEScapolite = 2.83 barns/electron
U=PEScapolite x relectron= 7.44 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: 76.3.1.0 (76)Tectosilicate Al-Si Framework
  (76.3)with other Be/Al/Si frameworks
  (76.3.1)Scapolite group
 
76.3.1.0 Scapolite * (Na,Ca)4[Al3Si9O24]Cl P 41/n 4/m
 
76.3.1.1 Marialite Na4Al3Si9O24Cl I 4/m 4/m
 
76.3.1.2 Meionite Ca4Al6Si6O24CO3 P 4/m 4/m
 
76.3.1.3 Silvialite! (Ca,Na)4Al6Si6O24(SO4,CO3) I 4/m 4/m
Help on  Strunz Class: Strunz Class: VIII/J.13-00 VIII - Silicates
  VIII/J - Tectosilicates (network) with anions unfamiliar to the tetraheders
  VIII/J.13 - Sodalite group, Marialite - Kalborsite series
 

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 - Applied Mineralogy 4 -Athena 5 - CalTech Mineral Spectroscopy 6 - Crocoite.com Mineral Locations 7 - Franklin Minerals(Palache) 8 -Google Images 9 -Google Scholar 10 - HyperPhysics 11 -MinDAT 12 -MinMax(Deutsch) 13 -MinMax(English) 14 -Mineralienatlas (Deutsch) 15 -QUT Mineral Atlas 16 - Scandinavian mineral gallery 17 - Tradeshop.com - The Rainbow of Gems 18 - UCLA - Petrography Thin-Sections 19 - WWW-MINCRYST

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Scapolite

(Na,Ca)4[Al3Si9O24]Cl
Dana No: 76.3.1.0 Strunz No: VIII/J.13-00
Locality:

 

Notes:

 

 
   
 
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