Mendipite Mineral Data

Mendipite Mineral Data
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General Mendipite Information

Help on Chemical Formula: Chemical Formula: Pb3Cl2O2
Help on Composition: Composition: Molecular Weight = 724.50 gm
   Lead      85.80 %  Pb   92.42 % PbO
   Chlorine   9.79 %  Cl    9.79 % Cl
               -   %   Cl   -2.21 % -O=Cl2   
   Oxygen     4.42 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb3Cl2O2
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1839
Help on Locality: Locality: Mendip Hills, Somersetshire, England. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its locality.
Help on Name Pronunciation: Name Pronunciation: Mendipite + Pronunciation Say MENDIPITE
Help on Synonym: Synonym: ICSD 23521
  PDF 25-448
 

Mendipite Image

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Mendipite   Crednerite

Comments: Sooty, deep-black, granular to platy crednerite with mendipite.
Location: Mendip Hills, Somerset, England. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species
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Mendipite   Chloroxiphite   Crednerite

Comments: Green, opaque granular chloroxiphite with mendipite and black crednerite.
Location: Higher Pitts Farm, Priddy, Mendip Hills, Somerset, England. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species
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Mendipite   Crednerite   Chloroxiphite

Comments: Radiating compact with clear to white crystalline mendipite with black crednerite and green chloroxiphite.
Location: Mendip Hills, Somerset, England. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Mendipite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.7966:1:0.4912
Help on Cell Dimensions: Cell Dimensions: a = 9.52, b = 11.95, c = 5.87, Z = 4; V = 667.79 Den(Calc)= 7.21
Help on Crystal System: Crystal System: Orthorhombic - DisphenoidalH-M Symbol (2 2 2) Space Group: P 212121
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.09(1), 2.78(0.7), 3.04(0.7),
Click Here for Large Mendipite Structure Window Crystal Structure:

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drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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 Help on Above


Krivovichev S V , Burns P C , European Journal of Mineralogy , 13 (2001) p.801-809, Crystal chemistry of lead oxide chlorides. I. Crystal structures of, synthetic mendipite, Pb3O2Cl2, and synthetic damaraite, Pb3O2(OH)Cl

 

Physical Properties of Mendipite

Help on Cleavage: Cleavage: {010} Distinct, {100} Distinct
Help on Color: Color: Colorless, White, Gray, Yellowish, Bluish.
Help on Density: Density: 7 - 7.2, Average = 7.1
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Conchoidal - Uneven - Uneven fracture producing small, conchoidal fragments.
Help on Habit: Habit: Columnar - Forms columns
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 2.5-3 - Finger Nail-Calcite
Help on Luster: Luster: Adamantine - Pearly
Help on Streak: Streak: white
 

Optical Properties of Mendipite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.166 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.148 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1766,KPDmeas= 0.1793,KC= 0.1538
Ncalc = 2.08 - 2.11
Help on Optical Data: Optical Data: Biaxial (+/-), a=2.24, b=2.27, g=2.31, bire=0.0700, 2V(Calc)=84, 2V(Meas)=90.
 

Calculated Properties of Mendipite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.89 gm/cc
note: Specific Gravity of Mendipite =7.21 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.18
Boson Index = 0.82
Help on Photoelectric: Photoelectric: PEMendipite =1,612.60 barns/electron
U=PEMendipite x rElectron Density=9,500.44 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Mendipite is Not Radioactive
 

Mendipite Classification
Help on Dana Class: Dana Class: 10.03.01.01 (10)Oxyhalides and Hydroxyhalides
  (10.03)where (A)3 (O,OH)2 Xq
  (10.03.01)Dana Group
 
10.03.01.01 Mendipite Pb3Cl2O2 P 212121 2 2 2
Help on Strunz Class: Strunz Class: 03.DC.70 03 - HALIDES
  03.D - Oxyhalides, Hydroxyhalides and Related Double Halides
  03.DC -With Pb (As,Sb,Bi), without Cu
 
03.DC.70 Mendipite Pb3Cl2O2 P 212121 2 2 2
 

Other Mendipite Information
Help on References: References: NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Mendipite :
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

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Ask about Mendipite here :
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Print or Cut-and-Paste your Mendipite Specimen Label here :

Mendipite

Pb3Cl2O2
Dana No: 10.03.01.01 Strunz No: 03.DC.70
Locality:

 

Notes: