Mineralogy Database

Marialite Mineral Data

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General Marialite Information

Help on Chemical  Formula: Chemical Formula: Na4Al3Si9O24Cl
Help on Composition: Composition: Molecular Weight = 845.11 gm
   Sodium    10.88 %  Na   14.67 % Na2O
   Aluminum   9.58 %  Al   18.10 % Al2O3
   Silicon   29.91 %  Si   63.99 % SiO2
   Chlorine   4.20 %  Cl    4.20 % Cl
               -   %   Cl   -0.95 % -O=Cl2   
   Oxygen    45.44 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na4Al3Si9O24Cl
Help on Environment: Environment: Basaltic tuff.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1866
Help on Locality: Locality: Pianura. Near Naples, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named by von Rath in honor of his wife, Maria Rosa vom Rath (1830-1888).
Help on Name Pronunciation: Name Pronunciation: Marialite + Pronunciation Say MARIALITE
Help on Synonym: Synonym: ICSD 39963
  PDF 31-1279

Marialite Image

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Comments: Fully terminated 4.3 cm crystal of marialite. Weakly fluorescent red under SW UV light.
Location: Gooderham, Haliburton Co., Ontario, Canada. Scale: 6 x 1.5 cm.
© John Veevaert

Marialite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.62244
Help on Cell Dimensions: Cell Dimensions: a = 12.075, c = 7.516, Z = 2; V = 1,095.88 Den(Calc)= 2.56
Help on Crystal System: Crystal System: Tetragonal - Dipyramidal H-M Symbol (4/m) Space Group: I 4/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.03(1), 3.44(1), 3.78(0.9),
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 Marialite

Help on Cleavage: Cleavage: {100} Distinct, {110} Distinct
Help on Color: Color: Bluish, Brownish, Colorless, Violet, Greenish.
Help on Density: Density: 2.5 - 2.62, Average = 2.56
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Hardness: Hardness: 5.5-6 - Knife Blade-Orthoclase
Help on Luminescence: Luminescence: Fluorescent, Long UV=strong yellow.
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: white

Optical Properties of Marialite

Help on Dichroism (e): Dichroism (e): colorless.
Help on Dichroism (w): Dichroism (w): colorless.
Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.007 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.007 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2102,KPDmeas= 0.2102,KC= 0.2117
Ncalc = 1.53 - 1.55
Help on Optical Data: Optical Data: Uniaxial (-), e=1.537, w=1.539, bire=0.0020.

Calculated Properties of Marialite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.53 gm/cc
note: Specific Gravity of Marialite =2.56 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEMarialite = 1.87 barns/electron
U=PEMarialite x rElectron Density= 4.74 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Marialite is Not Radioactive

Marialite 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 Marialite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990;Dana8) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Marialite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Franklin Minerals(Dunn)
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - HyperPhysics
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.FB.15





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