Marialite Mineral Data

General Marialite Information

Chemical Formula:

Na4Al3Si9O24Cl

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

Empirical Formula:

Na₄Al₃Si₉O₂₄Cl

Environment:

Basaltic tuff.

IMA Status:

Valid Species (Pre-IMA) 1866

Locality:

Pianura. Near Naples, Italy. Link to MinDat.org Location Data.

Name Origin:

Named by von Rath in honor of his wife, Maria Rosa vom Rath (1830-1888).

Name Pronunciation:

Marialite + Pronunciation

Synonym:

ICSD 39963

PDF 31-1279

Wernerite

Marialite Image

Images:

Marialite

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

Axial Ratios:

a:c = 1:0.62244

Cell Dimensions:

a = 12.075, c = 7.516, Z = 2; V = 1,095.88 Den(Calc)= 2.56

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/I_o): 3.03(1), 3.44(1), 3.78(0.9),

Forms:

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

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Physical Properties of Marialite

Cleavage:

{100} Distinct, {110} Distinct

Color:

Bluish, Brownish, Colorless, Violet, Greenish.

Density:

2.5 - 2.62, Average = 2.56

Diaphaneity:

Transparent to Translucent

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Hardness:

5.5-6 - Knife Blade-Orthoclase

Luminescence:

Fluorescent, Long UV=strong yellow.

Luster:

Vitreous - Pearly

Streak:

white

Optical Properties of Marialite

Dichroism (e):

colorless.

Dichroism (w):

colorless.

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

Optical Data:

Uniaxial (-), e=1.537, w=1.539, bire=0.0020.

Calculated Properties of Marialite

Electron Density:

Bulk Density (Electron Density)=2.53 gm/cc
note: Specific Gravity of Marialite =2.56 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Marialite= 1.87 barns/electron
U=PE_Marialite x rElectron Density= 4.74 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Marialite is Not Radioactive

Marialite Classification

Dana Class:

76.03.01.01 (76)Tectosilicate Al-Si Framework

(76.03)with other Be/Al/Si frameworks

(76.03.01)Scapolite group

76.03.01.00 Scapolite* (Na,Ca)4[Al3Si9O24]Cl P 4₁/n 4/m

76.03.01.01 Marialite Na4Al3Si9O24Cl I 4/m 4/m

76.03.01.02 Meionite Ca4Al6Si6O24CO3 P 4/m 4/m

76.03.01.03 Silvialite! (Ca,Na)4Al6Si6O24(SO4,CO3) I 4/m 4/m

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

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990;Dana8) OPTIC PROP.(Ford32)

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
17 - WWW-MINCRYST

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Print or Cut-and-Paste your Marialite Specimen Label here :

Marialite

Na4Al3Si9O24Cl
Dana No: 76.03.01.01 Strunz No: 09.FB.15
Locality:

Notes:

Dakota Matrix
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