Manganoneptunite Mineral Data (original) (raw)

General Manganoneptunite Information

Help on Chemical Formula: Chemical Formula:

KNa2Li(Mn,Fe++)2Ti2Si8O24

Help on Composition: Composition:

Molecular Weight = 906.78 gm

Potassium 4.31 % K 5.19 % K2O

Sodium 5.07 % Na 6.84 % Na2O

Lithium 0.77 % Li 1.65 % Li2O

Titanium 10.56 % Ti 17.62 % TiO2

Manganese 9.09 % Mn 11.73 % MnO

Iron 3.08 % Fe 3.96 % FeO

Silicon 24.78 % Si 53.01 % SiO2

Oxygen 42.35 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula:

KNa2LiMn2+1.5Fe2+0.5Ti2Si8O24

Help on Environment: Environment:

Found in syenites and syenite pegmatites.

Help on IMA Status: IMA Status:

Valid Species (Pre-IMA) 1923

Help on Locality: Locality:

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

Help on Name Origin: Name Origin:

Named for the composition and relationship to neptunite.

Help on Synonym: Synonym:

Mangan-neptunite - Renamed as Manganoneptunite by Mineralogical Record, v330 (2008), p131

Manganoneptunite Image

Click Here for Larger Manganoneptunite Image in a New Browser Window Images:

Click Here for Larger Manganoneptunite Image in a New Browser Window Images:

Click Here for Larger Manganoneptunite Image Manganoneptunite Shkatulkalite Comments: Pearly white shkatulkalite with brown mangan-neptunite grains. Location: Shkatulka pegmatite, Umbozero mine, Alluaiv Mt, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia.Scale: Picture size 4.5 mm. © Thomas Witzke / Abraxas-Verlag

Manganoneptunite Crystallography

Help on Axial Ratios: Axial Ratios:

a:b:c =1.3125:1:0.802

Help on Cell Dimensions: Cell Dimensions:

a = 16.38, b = 12.48, c = 10.01, Z = 4; beta = 115.4° V = 1,848.47 Den(Calc)= 3.26

Help on Crystal System: Crystal System:

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

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 1.506(1), 2.485(1), 1.483(0.9),

Click Here for Large Manganoneptunite Structure Window Crystal Structure:

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| | Zolotarev A A , Krivovichev S V , Yakovenchuk V N , Zapiski Vserossijskogo Mineralogicheskogo Obshchetstva , 136 (2007) p.118-123, Refinement of the mangan-neptunite structure, Locality: synthetic, Note: changed signs of z-coordinates of O12 and O14, Ti1(y) to .32364 | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |

Physical Properties of Manganoneptunite

Help on Color: Color:

Red.

Help on Density: Density:

3.23

Help on Diaphaneity: Diaphaneity:

Subopaque

Help on Hardness: Hardness:

5-6 - Between Apatite and Orthoclase

Help on Luster: Luster:

Vitreous (Glassy)

Optical Properties of Manganoneptunite

Help on Gladstone-Dale: Gladstone-Dale:

CI meas= 0.081 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.089 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.217,KPDmeas= 0.219,KC= 0.2383
Ncalc = 1.77 - 1.78

Help on Optical Data: Optical Data:

Biaxial (+), a=1.697, b=1.7, g=1.725, bire=0.0280, 2V(Calc)=40, 2V(Meas)=36.

Calculated Properties of Manganoneptunite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=3.15 gm/cc
note: Specific Gravity of Manganoneptunite =3.23 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Help on Photoelectric: Photoelectric:

PEManganoneptunite = 6.43 barns/electron
U=PEManganoneptunite x relectron= 20.26 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 60.70 (Gamma Ray American Petroleum Institute Units)
Concentration of Manganoneptunite per GRapi unit = 1.65 (%)

Estimated Radioactivity from Manganoneptunite - barely detectable

Manganoneptunite Classification

Help on Dana Class: Dana Class:

70.04.01.02 (70)Inosilicate Column or Tube Structures

(70.04)with linked chains forming cages

(70.04.01)Neptunite group

70.04.01.01 Neptunite KNa2Li(Fe,Mn)2Ti2Si8O24 Cc m

70.04.01.02 Manganoneptunite KNa2Li(Mn,Fe)2Ti2Si8O24 C 2/m 2/m

70.04.01.03 Watatsumiite! Na2KMn2LiV2Si8O24 Cc m

70.04.01.04 IMA2009-009 KNa2Li(Mg,Fe)2Ti2Si8O24 C 2/m 2/m

Help on Strunz Class: Strunz Class:

09.EH.05 09 - SILICATES (Germanates)

09.E - Phyllosilicates

09.EH -Transitional structures between phyllosilicate and other silicate units

09.EH.05 Neptunite KNa2Li(Fe,Mn)2Ti2Si8O24 Cc m

09.EH.05 Manganoneptunite KNa2Li(Mn,Fe)2Ti2Si8O24 C 2/m 2/m

09.EH.05 Watatsumiite! Na2KMn2LiV2Si8O24 Cc m

Other Manganoneptunite Information

Help on References: References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

Help on See Also: See Also:

Links to other databases for Manganoneptunite :
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 Manganoneptunite Specimen Label here :

Manganoneptunite

KNa2Li(Mn,Fe++)2Ti2Si8O24
Dana No: 70.04.01.02 Strunz No: 09.EH.05
Locality:

Notes: