Manaksite Mineral Data

General Manaksite Information

Chemical Formula:

KNaMn++Si4O10

Composition:

Molecular Weight = 389.36 gm

Potassium 10.04 % K 12.10 % K₂O

Sodium 5.90 % Na 7.96 % Na₂O

Manganese 14.11 % Mn 18.22 % MnO

Silicon 28.85 % Si 61.73 % SiO₂

Oxygen 41.09 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

KNaMn²⁺Si₄O₁₀

Environment:

In ultra-agpaitic pegmatites in a differentiated alkalic massif.

IMA Status:

Approved IMA 1992

Locality:

On Mt. Alluaiv, Lovozero massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

For MAnganese; sodium, NAtrium; potassium, Kalium; and SIlicon in its composition.

Name Pronunciation:

Manaksite + Pronunciation

Synonym:

IMA1990-024

Manaksite Image

Images:

Manaksite Bario-olgite

Comments: Pale brown massive manaksite associated with grayish-green bario-olgite, purple ussingite and colorless serandite.
Location: Palitra pegmatite, Kedykverpakhk Mountain, Lovozero massif, Kola Peninsula, Russia. Scale: See Image.
© Rruff Database

Manaksite Crystallography

Axial Ratios:

a:b:c =0.8508:1:1.2175

Cell Dimensions:

a = 6.993, b = 8.219, c = 10.007, Z = 2; alpha = 105.11°, beta = 100.76°, gamma = 114.79° V = 495.24 Den(Calc)= 2.61

Crystal System:

Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 3.45(1), 3.26(0.9), 3.05(0.8),

Physical Properties of Manaksite

Cleavage:

{001} Perfect, {010} Perfect

Color:

Colorless, Creamy white, Rosy.

Density:

2.73

Diaphaneity:

Transparent to Translucent

Hardness:

5 - Apatite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Manaksite

Gladstone-Dale:

CI meas= 0.009 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.009 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2012,KPDmeas= 0.2012,KC= 0.2031
Ncalc = 1.55

Optical Data:

Biaxial (-), a=1.54, b=1.551, g=1.557, bire=0.0170

Calculated Properties of Manaksite

Electron Density:

Bulk Density (Electron Density)=2.68 gm/cc
note: Specific Gravity of Manaksite =2.73 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Manaksite= 5.77 barns/electron
U=PE_Manaksite x r_electron= 15.46 barns/cc.

Radioactivity:

GRapi = 142.16 (Gamma Ray American Petroleum Institute Units)
Concentration of Manaksite per GRapi unit = 0.70 (%)

Estimated Radioactivity from Manaksite - barely detectable

Manaksite Classification

Dana Class:

70.01.01.03 (70)Inosilicate Column or Tube Structures

(70.01)with columnar silicate units

(70.01.01)Litidionite group

70.01.01.01 Litidionite KNaCuSi4O10 P1 1

70.01.01.02 Fenaksite (K,Na,Ca)4(Fe,Fe,Mn)2Si8O20(OH,F) P1 1

70.01.01.03 Manaksite KNaMnSi4O10 P1 1

70.01.01.04 Agrellite NaCa2Si4O10F P1 1

Strunz Class:

09.DG.70 09 - SILICATES (Germanates)

09.D - Inosilicates* Structural terminology according to Liebau (1985)

09.DG -Inosilicates with 3-periodic single and multiple chains

09.DG.70 Fenaksite (K,Na,Ca)4(Fe,Fe,Mn)2Si8O20(OH,F) P1 1

09.DG.70 Manaksite KNaMnSi4O10 P1 1

Other Manaksite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(37th List of New Min.,Min. Mag.,1996) OPTIC PROP.(37th List of New Min.,Min. Mag.,19)

See Also:

Links to other databases for Manaksite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

Search for Manaksite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Manaksite :

Ask about Manaksite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Manaksite

KNaMn++Si4O10
Dana No: 70.01.01.03 Strunz No: 09.DG.70
Locality:

Notes:

Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.