Natronambulite Mineral Data

General Natronambulite Information

Chemical Formula:

(Na,Li)Mn++4[Si5O14(OH)]

Composition:

Molecular Weight = 619.35 gm

Sodium 2.60 % Na 3.50 % Na₂O

Lithium 0.34 % Li 0.72 % Li₂O

Manganese 35.48 % Mn 45.81 % MnO

Silicon 22.67 % Si 48.51 % SiO₂

Hydrogen 0.16 % H 1.45 % H₂O

Oxygen 38.75 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Li_0.3Na_0.7Mn²⁺₄Si₅O₁₄(OH)

Environment:

Found in the mine dump.

IMA Status:

Approved IMA 1985

Locality:

Matsumaezawa ore body, Tahohata mine, Ivate Prefecture, Japan. Link to MinDat.org Location Data.

Name Origin:

Named for its composition and for Matsuo Nambu (1917-), mineralogist, Tohoko University, Japan.

Name Pronunciation:

Natronambulite + Pronunciation

Synonym:

ICSD 855

PDF 39-332

Natronambulite Image

Images:

Natronambulite

Comments: Thin section image of natronamulite (Nn) in assocation with aegirine (Ac), arfvedsonite (Am) and quartz (Q). (JMPS, v12:332).
Location: Tanohata mine, Iwate Prefecture, Japan. Scale: Picture Size 1.9 x 1.5 mm.
© Mineralogical Journal

Natronambulite Crystallography

Axial Ratios:

a:b:c =0.6478:1:0.5727

Cell Dimensions:

a = 7.62, b = 11.762, c = 6.737, Z = 2; alpha = 92.81°, beta = 94.55°, gamma = 106.87° V = 575.32 Den(Calc)= 3.58

Crystal System:

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

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

By Intensity(I/I_o): 3.559(1), 7.13(0.47), 3.078(0.45),

Physical Properties of Natronambulite

Cleavage:

{100} Perfect, {001} Perfect

Color:

Pink orange.

Density:

3.51

Diaphaneity:

Transparent to Translucent

Hardness:

5.5-6 - Knife Blade-Orthoclase

Luster:

Vitreous (Glassy)

Streak:

very pale orange

Optical Properties of Natronambulite

Gladstone-Dale:

CI meas= 0.006 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.025 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1998,KPDmeas= 0.2038,KC= 0.205
Ncalc = 1.72 - 1.73

Optical Data:

Biaxial (+), a=1.706, b=1.71, g=1.73, bire=0.0240, 2V(Calc)=50, 2V(Meas)=45.

Calculated Properties of Natronambulite

Electron Density:

Bulk Density (Electron Density)=3.40 gm/cc
note: Specific Gravity of Natronambulite =3.51 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_{Natronambulite}= 9.99 barns/electron
U=PE_{Natronambulite} x rElectron Density= 33.92 barns/cc.

Radioactivity:

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

Natronambulite Classification

Dana Class:

65.04.01.05 (65)Inosilicate Single-Width Unbranched Chains, W=1

(65.04)with chains P=5

(65.04.01)Rhodonite group

65.04.01.01 Rhodonite (Mn,Fe,Mg,Ca)SiO3 P1 1

65.04.01.02 Babingtonite Ca2(Fe,Mn)FeSi5O14(OH) P1 1

65.04.01.03 Manganbabingtonite Ca2(Mn,Fe)FeSi5O14(OH) P1 1

65.04.01.04 Nambulite (Li,Na)Mn4[Si5O14(OH)] P1 1

65.04.01.05 Natronambulite (Na,Li)Mn4[Si5O14(OH)] P1 1

65.04.01.06 Marsturite NaCaMn3[Si5O14(OH)] P1,P 1 Tri

65.04.01.07 Lithiomarsturite LiCa2Mn2HSi5O15 P1 1

65.04.01.08 Scandiobabingtonite! Ca2(Fe,Mn)ScSi5O14(OH) P1 1

Strunz Class:

09.DK.05 09 - SILICATES (Germanates)

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

09.DK -Inosilicates with 5-periodic single chains

09.DK.05 Babingtonite Ca2(Fe,Mn)FeSi5O14(OH) P1 1

09.DK.05 Marsturite NaCaMn3[Si5O14(OH)] P1,P 1 Tri

09.DK.05 Natronambulite (Na,Li)Mn4[Si5O14(OH)] P1 1

09.DK.05 Lithiomarsturite LiCa2Mn2HSi5O15 P1 1

09.DK.05 Manganbabingtonite Ca2(Mn,Fe)FeSi5O14(OH) P1 1

09.DK.05 Nambulite (Li,Na)Mn4[Si5O14(OH)] P1 1

09.DK.05 Rhodonite (Mn,Fe,Mg,Ca)SiO3 P1 1

09.DK.05 Scandiobabingtonite! Ca2(Fe,Mn)ScSi5O14(OH) P1 1

Other Natronambulite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Natronambulite :
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

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Natronambulite

(Na,Li)Mn++4[Si5O14(OH)]
Dana No: 65.04.01.05 Strunz No: 09.DK.05
Locality:

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