Marialite Mineral Data
General Marialite Information
Chemical Formula:
Na4Al3Si9O24Cl
Composition:
Molecular Weight = 845.11 gm
Sodium 10.88 % Na 14.67 % Na2 O
Aluminum 9.58 % Al 18.10 % Al2 O3
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:
Na4 Al3 Si9 O24 Cl
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
X Ray Diffraction:
By Intensity(I/Io ): 3.03(1), 3.44(1), 3.78(0.9),
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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:
PEMarialite = 1.87 barns/electronU=PEMarialite x r Electron 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:
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