Nambulite Mineral Data

[Content and History] [Recent Issues] [Back Issues] [Subscriptions] [Contacts]
See Also: [Diamond Crystals] [Excalibur Minerals] [Hudson Institute] [Minerals on CDROM]
Mineral News was founded some twenty years ago and has developed a following of
avid mineral collectors seeking timely information about new finds and other items
of interest to the collector community. Articles are solicited from collector and scientific authors.

General Nambulite Information

Chemical Formula:

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

Composition:

Molecular Weight = 612.13 gm

Sodium 0.94 % Na 1.27 % Na₂O

Lithium 0.85 % Li 1.83 % Li₂O

Manganese 35.90 % Mn 46.35 % MnO

Silicon 22.94 % Si 49.08 % SiO₂

Hydrogen 0.16 % H 1.47 % H₂O

Oxygen 39.21 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Li_0.75Na_0.25Mn²⁺₄Si₅O₁₄(OH)

Environment:

Forms a series with natronambulite.

IMA Status:

Approved IMA 1972

Locality:

Funakozawa mine, Kitakami Mountains, Iwate Prefecture, Japan. Link to MinDat.org Location Data.

Name Origin:

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

Name Pronunciation:

Nambulite + Pronunciation

Synonym:

ICSD 1974

PDF 27-1253

Nambulite Image

Images:

Nambulite

Comments: Brown crystalline nambulite with pinkish rhodonite.
Location: Gozaisho Mine, Iwaki, Fukushima, Japan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Nambulite Crystallography

Axial Ratios:

a:b:c =0.6479:1:0.5723

Cell Dimensions:

a = 7.621, b = 11.761, c = 6.731, Z = 2; alpha = 92.77°, beta = 95.08°, gamma = 106.87° V = 574.40 Den(Calc)= 3.54

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 2.96(1), 2.97(0.8), 2.92(0.7),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Narita H , Koto K , Morimoto N , Yoshii M , Acta Crystallographica, Section B , 31 (1975) p.2422-2426, The crystal structure of nambulite (Li,Na)Mn4Si5O14(OH)

Physical Properties of Nambulite

Cleavage:

{001} Perfect, {100} Distinct, {010} Distinct

Color:

Reddish orange brown.

Density:

3.51

Diaphaneity:

Transparent to Translucent

Hardness:

6.5 - Pyrite

Luster:

Vitreous - Adamantine

Streak:

light yellow

Optical Properties of Nambulite

Gladstone-Dale:

CI meas= 0.012 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.023 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2016,KPDmeas= 0.2039,KC= 0.2064
Ncalc = 1.72 - 1.73

Optical Data:

Biaxial (+), a=1.707, b=1.71, g=1.73, bire=0.0230, 2V(Calc)=44, 2V(Meas)=30. Dispersion r > v weak.

Calculated Properties of Nambulite

Electron Density:

Bulk Density (Electron Density)=3.39 gm/cc
note: Specific Gravity of Nambulite =3.51 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Nambulite= 10.09 barns/electron
U=PE_Nambulite x rElectron Density= 34.24 barns/cc.

Radioactivity:

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

Nambulite Classification

Dana Class:

65.04.01.04 (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 Nambulite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

See Also:

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

Search for Nambulite using:

[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Nambulite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Nambulite Mineral Data :

Ask about Nambulite 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 Nambulite Specimen Label here :

Nambulite

(Li,Na)Mn++4[Si5O14(OH)]
Dana No: 65.04.01.04 Strunz No: 09.DK.05
Locality:

Notes: