Zakharovite Mineral Data

General Zakharovite Information

Chemical Formula:

Na4Mn++5Si10O24(OH)6•6(H2O)

Composition:

Molecular Weight = 1,241.63 gm

Sodium 7.41 % Na 9.98 % Na₂O

Manganese 22.12 % Mn 28.57 % MnO

Silicon 22.62 % Si 48.39 % SiO₂

Hydrogen 1.46 % H 13.06 % H₂O

Oxygen 46.39 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₄Mn²⁺₅Si₁₀O₂₄(OH)₆•6(H₂O)

Environment:

In ussingite veinlets cutting foyaite in differentiated alkalic massifs.

IMA Status:

Approved IMA 1982

Locality:

At Mt. Karnasurt, Lovozero massif, and on Mts. Yukspor and Koashva, Khibiny massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for Evgeii Evgen'evich Zakharov (1902-1980), Director of the Moscow Geological Exploration Institute, Moscow, Russia.

Name Pronunciation:

Zakharovite + Pronunciation

Zakharovite Crystallography

Axial Ratios:

a:c = 1:2.58641

Cell Dimensions:

a = 14.58, c = 37.71, Z = 9; V = 6,942.28 Den(Calc)= 2.67

Crystal System:

Trigonal - Ditrigonal Pyramidal H-M Symbol (3m) Space Group: P 3₁m,P 3m1

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

By Intensity(I/I_o): 12.57(1), 3.16(0.4), 3.427(0.15),

Physical Properties of Zakharovite

Cleavage:

{0001} Perfect

Color:

Yellow, Bright yellow.

Density:

2.58 - 2.64, Average = 2.61

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Hardness:

2 - Gypsum

Luster:

Earthy (Dull)

Streak:

white

Optical Properties of Zakharovite

Gladstone-Dale:

CI meas= 0.043 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.065 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.206,KPDmeas= 0.2107,KC= 0.2203
Ncalc = 1.57 - 1.59

Optical Data:

Uniaxial (-), e=1.535, w=1.565, bire=0.0300.

Calculated Properties of Zakharovite

Electron Density:

Bulk Density (Electron Density)=2.59 gm/cc
note: Specific Gravity of Zakharovite =2.61 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Zakharovite= 6.55 barns/electron
U=PE_Zakharovite x rElectron Density= 16.93 barns/cc.

Radioactivity:

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

Zakharovite Classification

Dana Class:

78.03.03.01 (78)Unclassified silicates

(78.03)possible cyclosilicates

(78.03.03)Dana Group

78.03.03.01 Zakharovite Na4Mn5Si10O24(OH)6•6(H2O) P 3₁m,P 3m1 3m

Strunz Class:

09.EE.65 09 - SILICATES (Germanates)

09.E - Phyllosilicates

09.EE -Single tetrahedral nets of 6-membered rings

09.EE.65 Shafranovskite K2Na3(Mn,Fe,Na)4[Si9(O,OH)27](OH)2•n(H2O),n~2.33 P 3₁c 3m

09.EE.65 Zakharovite Na4Mn5Si10O24(OH)6•6(H2O) P 3₁m,P 3m1 3m

Other Zakharovite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

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

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Zakharovite

Na4Mn++5Si10O24(OH)6•6(H2O)
Dana No: 78.03.03.01 Strunz No: 09.EE.65
Locality:

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