Natronambulite Mineral Data

Natronambulite Mineral Data +

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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.

Synonym:

ICSD 855

PDF 39-332

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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 - PinacoidalH-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

Diaphaniety:

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

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:

r_electron=3.40 gm/cc
note: r_{Natronambulite}=3.51 gm/cc.

Fermion Index

Fermion Index = 0.01102
Boson Index = 0.98898

Photoelectric:

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

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Natronambulite is Not Radioactive

Natronambulite Classification

Dana Class:

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

(65.4)with chains P=5

(65.4.1)Rhodonite group

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

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

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

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

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

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

65.4.1.7 Lithiomarsturite LiCa2Mn2HSi5O15 P1 1

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

Strunz Class:

VIII/F.27-60 VIII - Silicates

VIII/F - Inosilicates (chain and band) Five chains [Si5O15]10-

VIII/F.27 - Rhodonite - Inesite series

VIII/F.27-10 Rhodonite (Mn,Fe,Mg,Ca)SiO3 P1 1

VIII/F.27-20 Babingtonite Ca2(Fe,Mn)FeSi5O14(OH) P1 1

VIII/F.27-30 Manganbabingtonite Ca2(Mn,Fe)FeSi5O14(OH) P1 1

VIII/F.27-35 Scandiobabingtonite! Ca2(Fe,Mn)ScSi5O14(OH) P1 1

VIII/F.27-40 Santaclaraite CaMn4Si5O14(OH)2·(H2O) P1 1

VIII/F.27-50 Nambulite (Li,Na)Mn4[Si5O14(OH)] P1 1

VIII/F.27-60 Natronambulite (Na,Li)Mn4[Si5O14(OH)] P1 1

VIII/F.27-70 Lithiomarsturite LiCa2Mn2HSi5O15 P1 1

VIII/F.27-80 Marsturite NaCaMn3[Si5O14(OH)] P1,P 1 Tri

VIII/F.27-90 Inesite Ca2Mn7Si10O28(OH)2·5(H2O) 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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (MinSocAm) 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 -École des Mines de Paris

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Natronambulite

(Na,Li)Mn++4[Si5O14(OH)]
Dana No: 65.4.1.5 Strunz No: VIII/F.27-60
Locality:

Notes: