Magadiite Mineral Data

Magadiite Mineral Data
Search Webmineral :
   
Home Crystal jmol jPOWD Chem X Ray Dana Strunz Properties A to Z Images Share
      News Help About

Advertisment
Hudson Institute of Mineralogy
 A Bijoux.com is an online store specialized in the sale on the internet of precious stones , gems , minerals and jewels for individuals and professionals
 Weinrich Minerals, A Dealer in Fine Mineral Specimens - Since 1989. We buy collections and single high quality specimens.
 McDougall Minerals sells high-quality mineral specimens from all over the world to collectors of all levels, from beginners to connoisseurs

General Magadiite Information

Help on Chemical Formula: Chemical Formula: NaSi7O13(OH)3•4(H2O)
Help on Composition: Composition: Molecular Weight = 550.66 gm
   Sodium     4.17 %  Na    5.63 % Na2O
   Silicon   35.70 %  Si   76.38 % SiO2
   Hydrogen   2.01 %  H    17.99 % H2O
   Oxygen    58.11 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: NaSi7O13(OH)3•4(H2O)
Help on Environment: Environment: Associated with other rare alkalic minerals in brines with high Ph and silica content.
Help on IMA Status: IMA Status: Approved IMA 1967
Help on Locality: Locality: Lake Magadi, Olduvai Gorge, Kenya. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Magadiite + Pronunciation Say MAGADIITE
 

Magadiite Image

Click Here for Larger Magadiite Image in a New Browser Window Images:
Click Here for Larger Magadiite Image

Magadiite   Rhodesite

Comments: Earth pale tan massive magadiite with dark yellow crystalline rhodesite.
Location: East Fork, Trinity River, Trinity County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Magadiite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1:1:2.1641
Help on Cell Dimensions: Cell Dimensions: a = 7.25, b = 7.25, c = 15.69, Z = 2; beta = 96.8° V = 818.90 Den(Calc)= 2.23
Help on Crystal System: Crystal System: MonoclinicSpace Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 15.41(1), 3.435(0.8), 3.146(0.5),
Click Here for Large Magadiite Structure Window 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


Garces J M , Rocke S C , Crowder C E , Hasha D L , Clays and Clay Minerals , 36 (1988) p.409-418, Hypothetical structures of magadiite and sodium octosilicate and structural, relationships between the layered alkali metal silicates and the mordenite- and, pentasil-group zeolites, Note: hypothetical model structure, Note: setting changed from left- to right-handed

 

Physical Properties of Magadiite

Help on Color: Color: White.
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Habit: Habit: Powdery - Forms a loose, poorly-coherent pulverulent mass.
Help on Hardness: Hardness: 2 - Gypsum
Help on Luminescence: Luminescence: Fluorescent, Short UV=yellow-white, Long UV=yellow-white.
Help on Luster: Luster: Vitreous - Dull
Help on Streak: Streak: white
 

Optical Properties of Magadiite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= 0.087 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2108,KC= 0.2307
Ncalc = 1.51
Help on Optical Data: Optical Data: Biaxial (?), a=1.47
 

Calculated Properties of Magadiite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.27 gm/cc
note: Specific Gravity of Magadiite =2.23 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEMagadiite = 1.48 barns/electron
U=PEMagadiite x rElectron Density= 3.36 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Magadiite is Not Radioactive
 

Magadiite Classification
Help on Dana Class: Dana Class: 78.07.12.01 (78)Unclassified silicates
  (78.07)wholly unclassified silicates
  (78.07.12)Dana Group
 
78.07.12.01 Magadiite NaSi7O13(OH)3•4(H2O) Unk Mono
Help on Strunz Class: Strunz Class: 09.EA.20 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.EA -Single nets of tetrahedra with 4-, 5-, (6-), and 8-membered rings
 
09.EA.20 Magadiite NaSi7O13(OH)3•4(H2O) Unk Mono
 

Other Magadiite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(www.saint-hilaire.ca) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Magadiite :
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

Search for Magadiite using:

Google
 
Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Magadiite :

A Bijoux Google Search for Magadiite
Adam's Minerals Google Search for Magadiite
Cape Minerals Google Search for Magadiite
Dakota Matrix Minerals Google Search for Magadiite
Excalibur Mineral Corp. Google Search for Magadiite
Exceptional Minerals Google Search for Magadiite
John Betts Fine Minerals Search for Magadiite
McDougall Minerals Google Search for Magadiite
Mineral News Website Link
Rock and Mineral Shows Google Search for Magadiite
Weinrich Minerals, Inc. Google Search for Magadiite

Ask about Magadiite 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 Espaņol

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

Magadiite

NaSi7O13(OH)3•4(H2O)
Dana No: 78.07.12.01 Strunz No: 09.EA.20
Locality:

 

Notes: