Manganonaujakasite Mineral Data

General Manganonaujakasite Information

Chemical Formula:

Na6(Mn,Fe++ )Al4Si8O26

Composition:

Molecular Weight = 943.02 gm

Sodium 14.63 % Na 19.72 % Na₂O

Manganese 3.09 % Mn 3.99 % MnO

Aluminum 11.44 % Al 21.62 % Al₂O₃

Iron 2.90 % Fe 3.73 % FeO

Silicon 23.83 % Si 50.97 % SiO₂

Oxygen 44.11 % O

______ ______

100.00 % 100.03 % = TOTAL OXIDE

Empirical Formula:

Na₆Mn²⁺_0.53Fe²⁺_0.49Al₄Si₈O₂₆

Environment:

Irregular grains and phenocrysts in a lovozerite-lomonosovite nepheline syenite.

IMA Status:

Approved IMA 1999 (Dana # Added)

Locality:

Lovozero alkaline massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Named as the manganese analog of naujakasite.

Synonym:

IMA1999-031

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Manganonaujakasite Crystallography

Axial Ratios:

a:b:c =1.8808:1:1.3109

Cell Dimensions:

a = 15.039, b = 7.996, c = 10.482, Z = 2; beta = 113.51° V = 1,155.85 Den(Calc)= 2.71

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.068(1)(022,313,221), 3.623(0.92)(112), 3.995(0.65)(020,310), 3.485(0.58)(203,221), 3.552(0.56)(402), 2.613(0.39)(420), 3.362(0.33), 3.45(0

Physical Properties of Manganonaujakasite

Cleavage:

{001} Perfect

Color:

Bright blue.

Density:

2.67

Diaphaneity:

Transparent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

3-4 - Calcite-Fluorite

Luster:

Vitreous (Glassy)

Streak:

pale blue

Optical Properties of Manganonaujakasite

Gladstone-Dale:

CI meas= -0.01 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.004 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2022,KPDmeas= 0.2052,KC= 0.2031
Ncalc = 1.54 - 1.55

Optical Data:

Biaxial (-), a=1.539, b=1.551, g=1.554, bire=0.0150, 2V(Calc)=52, 2V(Meas)=54. Dispersion r < v.

Calculated Properties of Manganonaujakasite

Electron Density:

Bulk Density (Electron Density)=2.67 gm/cc
note: Specific Gravity of Manganonaujakasite =2.71 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_{Manganonaujakasite}= 3.11 barns/electron
U=PE_{Manganonaujakasite} x rElectron Density= 8.31 barns/cc.

Radioactivity:

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

Manganonaujakasite Classification

Dana Class:

73.01.01.02 (73)Phyllosilicate Condensed Tetrahedral Sheets

(73.01)with double layers

(73.01.01)Dana Group

73.01.01.01 Naujakasite Na6(Fe,Mn)Al4Si8O26 C 2/m 2/m

73.01.01.02 Manganonaujakasite! Na6(Mn,Fe)Al4Si8O26 C 2/m 2/m

Strunz Class:

09.EG.10 09 - SILICATES (Germanates)

09.E - Phyllosilicates

09.EG -Double nets with 6-membered and larger rings

09.EG.10 Naujakasite Na6(Fe,Mn)Al4Si8O26 C 2/m 2/m

09.EG.10 Manganonaujakasite! Na6(Mn,Fe)Al4Si8O26 C 2/m 2/m

Other Manganonaujakasite Information

References:

NAME( AmMin, Vol 86, p 1113) PHYS. PROP.(AmMin, Vol 86, p 1113) OPTIC PROP.(AmMin, Vol 86, p 1113)

See Also:

Links to other databases for Manganonaujakasite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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

Manganonaujakasite

Na6(Mn,Fe++ )Al4Si8O26
Dana No: 73.01.01.02 Strunz No: 09.EG.10
Locality:

Notes: