Mineralogy Database

Margarosanite Mineral Data

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General Margarosanite Information

Help on Chemical  Formula: Chemical Formula: Pb(Ca,Mn++)2Si3O9
Help on Composition: Composition: Molecular Weight = 516.23 gm
   Calcium    15.45 %  Ca   21.62 % CaO
   Manganese   0.85 %  Mn    1.10 % MnO
   Silicon    15.67 %  Si   33.52 % SiO2
   Lead       40.14 %  Pb   43.24 % PbO
   Oxygen     27.89 %  O
             ______        ______ 
             100.00 %       99.47 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: PbCa1.99Mn2+0.08Si2.88O9
Help on Environment: Environment: In a metamorphosed stratiform zinc deposit.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1916
Help on Locality: Locality: Franklin, Sussex Co., New Jersey, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named from the Greek for "pearl" and "tablet", in reference to its luster and lamellar habit.
Help on Name Pronunciation: Name Pronunciation: Margarosanite + Pronunciation Say MARGAROSANITE
Help on Synonym: Synonym: ICSD 18098
  PDF 27-79
 

Margarosanite Image

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  Minehillite   Margarosanite   Wollastonite-1A

Comments: White pearly crystalline minehillite with white margarosanite and dark gray lead, in pale pink opaque wollastonite (distinguished by blue-white fluorescence).
Location: Franklin, Sussex County, New Jersey, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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  Margarosanite

Comments: Clear or white, long, thin bladed crystals of margarosanite on matrix.
Location: Langban, Varmland, Sweden. Scale: Crystal size 1cm.
© Tom Loomis / Dakota Matrix

Margarosanite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.7068:1:0.7016
Help on Cell Dimensions: Cell Dimensions: a = 6.768, b = 9.575, c = 6.718, Z = 2; alpha = 110.36°, beta = 102.98°, gamma = 83.02° V = 394.78 Den(Calc)= 4.34
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.989(1), 3.034(0.91), 5.097(0.8),
 

Physical Properties of Margarosanite

Help on Cleavage: Cleavage: {???} Perfect, {???} Imperfect, {???} Imperfect
Help on Color: Color: Colorless, Pearl white.
Help on Density: Density: 3.99 - 4.33, Average = 4.16
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Cleaveable - Easily cleaved into fragments.
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 2.5-3 - Finger Nail-Calcite
Help on Luminescence: Luminescence: Fluorescent, Short UV=red sky blue, Long UV=red orange.
Help on Luster: Luster: Pearly
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: white
 

Optical Properties of Margarosanite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.053 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.014 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1772,KPDmeas= 0.184,KC= 0.1748
Ncalc = 1.7 - 1.76
Help on Optical Data: Optical Data: Biaxial (-), a=1.727, b=1.771, g=1.798, bire=0.0710
 

Calculated Properties of Margarosanite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.95 gm/cc
note: Specific Gravity of Margarosanite =4.32 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.09
Boson Index = 0.91
Help on Photoelectric: Photoelectric: PEMargarosanite = 676.49 barns/electron
U=PEMargarosanite x rElectron Density=2,673.40 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Margarosanite is Not Radioactive
 

Margarosanite Classification

Help on  Dana Class: Dana Class: 59.01.02.02 (59)Cyclosilicate Three-Membered Rings
  (59.01)anhydrous, no other anions
  (59.01.02)Walstromite group
 
59.01.02.01 Walstromite BaCa2Si3O9 P1 1
 
59.01.02.02 Margarosanite Pb(Ca,Mn)2Si3O9 P1 1
Help on  Strunz Class: Strunz Class: 09.CA.25 09 - SILICATES (Germanates)
  09.C - Cyclosilicates
  09.CA -[Si3O9]6- 3-membered single rings (dreier-Einfachringe),
 
09.CA.25 Margarosanite Pb(Ca,Mn)2Si3O9 P1 1
 
09.CA.25 Walstromite BaCa2Si3O9 P1 1
 

Other Margarosanite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Collectors Book of Fluorescent Minerals) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Margarosanite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Franklin Minerals(Dunn)
6 - Franklin Minerals(Palache)
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
17 - WWW-MINCRYST

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Margarosanite

Pb(Ca,Mn++)2Si3O9
Dana No: 59.01.02.02 Strunz No: 09.CA.25
Locality:

 

Notes:

 

 
   
 


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