Margarite Mineral Data

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


AA Mineral Sepcimens
[What's New] [Mineral Galleries] [About Us] [Contacts] [Login]
At AA Mineral Specimens, we source quality Mineral Specimens, Fossils, Gemstones,
Decorative Stones, Lapidary Material and Specimen Sets world-wide


General Margarite Information

Help on Chemical Formula: Chemical Formula: CaAl2(Al2Si2)O10(OH)2
Help on Composition: Composition: Molecular Weight = 398.18 gm
   Calcium   10.07 %  Ca   14.08 % CaO
   Aluminum  27.10 %  Al   51.21 % Al2O3
   Silicon   14.11 %  Si   30.18 % SiO2
   Hydrogen   0.51 %  H     4.52 % H2O
   Oxygen    48.22 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaAl4Si2O10(OH)2
Help on Environment: Environment: Commonly associated with corundum as an alteration product.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1823
Help on Locality: Locality: Corundum mines at Ekaterinurg Distict, Ural Mountains, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek margaritos - "pearl."
Help on Name Pronunciation: Name Pronunciation: Margarite Say MARGARITE
 

Margarite Image

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

Margarite

Comments: Beige, massive, fibrous/foliated aggregate of margarite crystals.
Location: Long Hill/Old Tungsten Mine in Trumbull, Connecticut, USA. Scale: 10 x 5 cm.
© Walter Mroch / Gem and Mineral Exploration Company

Margarite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.5816:1:2.1774
Help on Cell Dimensions: Cell Dimensions: a = 5.118, b = 8.799, c = 19.159, Z = 4; beta = 95.15° V = 859.31 Den(Calc)= 3.08
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.18(1), 1.908(0.35), 2.517(0.25),
Click Here for Large Margarite 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


Guggenheim S , Bailey S W , American Mineralogist , 63 (1978) p.186-187, Refinement of the margarite structure in subgroup symmetry: correction,, further refinement, and comments

 

Physical Properties of Margarite

Help on Cleavage: Cleavage: {001} Good
Help on Color: Color: White, Gray, Pinkish gray, Yellowish gray.
Help on Density: Density: 2.99 - 3.08, Average = 3.03
Help on Diaphaneity: Diaphaneity: Translucent to subtranslucent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Lamellar - Thin laminae producing a lamellar structure.
Help on Habit: Habit: Massive - Lamellar - Distinctly foliated fine-grained forms.
Help on Habit: Habit: Scaly - Morphology like fish scales.
Help on Hardness: Hardness: 4 - Fluorite
Help on Luminescence: Luminescence: Fluorescent, Short UV=sky blue, Long UV=strong sky blue.
Help on Luster: Luster: Pearly
Help on Streak: Streak: white
 

Optical Properties of Margarite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.028 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.042 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2047,KPDmeas= 0.2077,KC= 0.2137
Ncalc = 1.64 - 1.66
Help on Optical Data: Optical Data: Biaxial (-), a=1.595-1.638, b=1.625-1.648, g=1.627-1.65, bire=0.0120-0.0320, 2V(Calc)=28-46, 2V(Meas)=26-67. Dispersion r < v.
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): colorless.
Help on Pleochroism (z): Pleochroism (z): colorless.
 

Calculated Properties of Margarite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.02 gm/cc
note: Specific Gravity of Margarite =3.04 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0069559576
Boson Index = 0.9930440424
Help on Photoelectric: Photoelectric: PEMargarite = 2.58 barns/electron
U=PEMargarite x rElectron Density= 7.79 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Margarite is Not Radioactive
 

Margarite Classification
Help on Dana Class: Dana Class: 71.02.02c.01 (71)Phyllosilicate Sheets of Six-Membered Rings
  (71.02)with 2:1 Layers
  (71.02.02c)Mica Group (Margarite subgroup)
 
71.02.02c.01 Margarite CaAl2(Al2Si2)O10(OH)2 C 2/c 2/m
 
71.02.02c.02 Clintonite Ca(Mg,Al)3(Al3Si)O10(OH)2 C 2/m 2/m
 
71.02.02c.03 Bityite CaLiAl2(AlBeSi2)O10(OH)2 C 2/c 2/m
 
71.02.02c.04 Anandite (Ba,K)(Fe,Mg)3(Si,Al,Fe)4O10(S,OH)2 C 2/m 2/m
 
71.02.02c.05 Kinoshitalite (Ba,K)(Mg,Mn,Al)3Si2Al2O10(OH)2 C 2/m 2/m
 
71.02.02c.06 Ferrokinoshitalite! (Ba,K)(Fe,Mg)3(Si2Al2)O10(OH,F)2 C 2/m 2/m
 
71.02.02c.07 Ganterite! [Ba0.5(Na,K)0.5]Al2(Si2.5Al1.5O10)(OH)2 C 2/c 2/m
 
71.02.02c.08 Oxykinoshitalite! (Ba,K)(Mg,Fe,Ti)3(Si,Al)4O10O2 C 2/m 2/m
Help on Strunz Class: Strunz Class: 09.EC.30 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.EC -Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets
 
09.EC.30 Margarite CaAl2(Al2Si2)O10(OH)2 C 2/c 2/m
 

Other Margarite Information
Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Collectors Book of Fluorescent Minerals) OPTIC PROP.(Heinrich65)
Help on See Also: See Also: Links to other databases for Margarite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Franklin Minerals(Dunn)
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - HyperPhysics
11 - MinDAT
12 - MinMax(Deutsch)
13 - MinMax(English)
14 - Mineralienatlas (Deutsch)
15 - QUT Mineral Atlas
16 - Ruff.Info
17 - Scandinavian mineral gallery
18 - WWW-MINCRYST

Search for Margarite using:

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

Visit our Advertisers for Margarite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

Excalibur Minerals

Exceptional Minerals

Fabre Minerals

Heliodor

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Margarite Mineral Data :

Ask about Margarite 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 Margarite Specimen Label here :

Margarite

CaAl2(Al2Si2)O10(OH)2
Dana No: 71.02.02c.01 Strunz No: 09.EC.30
Locality:

 

Notes: