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Epidote-(Pb) Mineral Data

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General Epidote-(Pb) Information

Help on Chemical Formula: Chemical Formula: (Ca,Pb,Sr)2(Al,Fe+++)3(SiO4)(Si2O7)O(OH)
Help on Composition: Composition: Molecular Weight = 583.18 gm
   Strontium   3.00 %  Sr    3.55 % SrO
   Calcium     8.25 %  Ca   11.54 % CaO
   Manganese   2.83 %  Mn    2.43 % MnO /  1.35 % Mn2O3
   Aluminum    9.25 %  Al   17.48 % Al2O3
   Iron        8.62 %  Fe   12.32 % Fe2O3
   Silicon    14.45 %  Si   30.91 % SiO2
   Hydrogen    0.17 %  H     1.54 % H2O
   Lead       17.76 %  Pb   19.14 % PbO
   Oxygen     35.67 %  O
             ______        ______ 
             100.00 %      100.27 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca1.2Pb0.5Sr0.2Mn2+0.2Al2Fe3+0.9Mn3+0.1(SiO4)(Si2O7)O(OH)
Help on Environment: Environment: Metamorphosed zinc deposit.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1899 - Dana # Changed from 58.2.1a.8
Help on Locality: Locality: Franklin, New Jersey Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Elwood P. Hancock (1836-1916), of Berlinton, New Jersey, USA, collector of minerals from Franklin.
Help on Name Pronunciation: Name Pronunciation: Epidote-(Pb) Say EPIDOTE-(PB)
Help on Synonym: Synonym: Handcockite - Renamed to Epidote-(Pb) - Recommended nomenclature of epidote-group minerals, Eur. J. Mineral. 2006, 18, 551-567.
 

Epidote-(Pb) Image

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  Clinohedrite   Epidote-(Pb)

Comments: Clear crystals of clinohedrite on hancockite (epidote-(Pb)).
Location: Franklin, Sussex County, New Jersey, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals
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  Epidote-(Pb)

Comments: Reddish brown prisms of hancockite on matrix.
Location: Franklin, Sussex County, New Jersey, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals
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  Nasonite   Epidote-(Pb)

Comments: Colorless, transparent hexagonal prism of nasonite on reddish brown hancockite (epidote-(Pb)).
Location: Franklin, Sussex County, New Jersey, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Epidote-(Pb) Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1.6067:1:1.8309
Help on Cell Dimensions: Cell Dimensions: a = 9.03, b = 5.62, c = 10.29, Z = 2; beta = 115.9° V = 469.75 Den(Calc)= 4.12
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.91(1), 2.6(0.5), 3.49(0.5),
 

Physical Properties of Epidote-(Pb)

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Brown, Brick red, Brownish red, Maroon.
Help on Density: Density: 4
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Habit: Habit: Striated - Parallel lines on crystal surface or cleavage face.
Help on Hardness: Hardness: 6-7 - Orthoclase-Quartz
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Dull
Help on Streak: Streak: brownish white
 

Optical Properties of Epidote-(Pb)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.028 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.056 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1966,KPDmeas= 0.2025,KC= 0.2082
Ncalc = 1.83 - 1.86
Help on Optical Data: Optical Data: Biaxial (-), a=1.79, b=1.81, g=1.83, bire=0.0400, 2V(Calc)=88, 2V(Meas)=50. Dispersion r > v perceptible.
Help on Pleochroism (x): Pleochroism (x): colorless, pale rose, or greenish yellow.
Help on Pleochroism (y): Pleochroism (y): pale brownish yellow, yellow, or yellow.
Help on Pleochroism (z): Pleochroism (z): pale rose, greenish yellow, or green.
 

Calculated Properties of Epidote-(Pb)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.79 gm/cc
note: Specific Gravity of Epidote-(Pb) =4.00 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.05
Boson Index = 0.95
Help on Photoelectric: Photoelectric: PEEpidote-(Pb) = 296.24 barns/electron
U=PEEpidote-(Pb) x rElectron Density=1,123.65 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Epidote-(Pb) is Not Radioactive
 

Epidote-(Pb) Classification
Help on Dana Class: Dana Class: 58.02.01a.03 (58)Sorosilicate Insular, Mixed, Single, and Larger Tetrahedral Groups
  (58.02)with cations in [6] and higher coordination; single and double groups (n=1,2)
  (58.02.01a)Epidote group (Clinozoisite subgroup)
 
58.02.01a.01 Clinozoisite! Ca2Al3(SiO4)3(OH)=Ca2AlAl2(SiO4)(Si2O7)O(OH) P 21/m 2/m
 
58.02.01a.02 Epidote! Ca2(Fe,Al)3(SiO4)3(OH)=Ca2(Fe,Al)Al2(SiO4)(Si2O7)O(OH) P 21/m 2/m
 
58.02.01a.03 Epidote-(Pb)! (Ca,Pb,Sr)2(Al,Fe)3(SiO4)(Si2O7)O(OH) P 21/m 2/m
 
58.02.01a.04 Mukhinite Ca2Al2V(SiO4)3(OH) P 21/m 2/m
 
58.02.01a.05 Piemontite Ca2(Al,Mn,Fe)3(SiO4)3(OH)=Ca2(Mn,Fe)Al2(SiO4)(Si2O7)O(OH) P 21/m 2/m
 
58.02.01a.06 Piemontite-(Sr)! (Ca,Mn)(Sr,Ca)Mn(Al,Mn,Fe)2(SiO4)(Si2O7)O(OH) P 21/m 2/m
 
58.02.01a.07 Manganipiemontite-(Sr)! CaSr(Mn,Fe)2Al[Si3O12](OH) P 21/m 2/m
 
58.02.01a.08 Gatelite-(Ce)! (Ca,Ce,La,Nd)4(Al,Mg,Fe)4[Si2O7][SiO4]3(O,F,OH)3 P 21/a 2/m
 
58.02.01a.09 Clinozoisite-(Sr)! CaSrAl3(Si2O7)(SiO4)O(OH) P 21/m 2/m
 
58.02.01a.10 Uedaite-(Ce)! MnCeAl2Fe(Si2O7)(SiO4)O(OH) P 21/m 2/m
 
58.02.01a.11 Epidote-(Sr)! CaSrAl2Fe(Si2O7)(SiO4)O(OH) P 21/m 2/m
Help on Strunz Class: Strunz Class: 09.BG.05a 09 - SILICATES (Germanates)
  09.B - Sorosilicates
  09.BG -Sorosilicates with mixed SiO4 and Si2O7 groups;
 
09.BG.05a Clinozoisite Ca2Al3(SiO4)3(OH)=Ca2AlAl2(SiO4)(Si2O7)O(OH) P 21/m 2/m
 
09.BG.05a Epidote Ca2(Fe,Al)3(SiO4)3(OH)=Ca2(Fe,Al)Al2(SiO4)(Si2O7)O(OH) P 21/m 2/m
 
09.BG.05a Epidote-(Pb) (Ca,Pb,Sr)2(Al,Fe)3(SiO4)(Si2O7)O(OH) P 21/m 2/m
 
09.BG.05a Mukhinite Ca2Al2V(SiO4)3(OH) P 21/m 2/m
 
09.BG.05a Piemontite Ca2(Al,Mn,Fe)3(SiO4)3(OH)=Ca2(Mn,Fe)Al2(SiO4)(Si2O7)O(OH) P 21/m 2/m
 
09.BG.05a Piemontite-(Sr)! (Ca,Mn)(Sr,Ca)Mn(Al,Mn,Fe)2(SiO4)(Si2O7)O(OH) P 21/m 2/m
 
09.BG.05a Manganipiemontite-(Sr)! CaSr(Mn,Fe)2Al[Si3O12](OH) P 21/m 2/m
 
09.BG.05a Clinozoisite-(Sr)! CaSrAl3(Si2O7)(SiO4)O(OH) P 21/m 2/m
 
09.BG.05a Epidote-(Sr)! CaSrAl2Fe(Si2O7)(SiO4)O(OH) P 21/m 2/m
 

Other Epidote-(Pb) Information
Help on References: References: NAME( MinRec) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic2)
Help on See Also: See Also: Links to other databases for Epidote-(Pb) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Epidote-(Pb)

(Ca,Pb,Sr)2(Al,Fe+++)3(SiO4)(Si2O7)O(OH)
Dana No: 58.02.01a.03 Strunz No: 09.BG.05a
Locality:

 

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