Yedlinite Mineral Data

General Yedlinite Information

Chemical Formula: Pb6CrCl6(O,OH)8 Composition: Molecular Weight = 1,637.92 gm    Chromium   3.17 %  Cr    5.13 % CrO₂    Hydrogen   0.12 %  H     1.10 % H₂O    Lead      75.90 %  Pb   81.76 % PbO    Chlorine  12.99 %  Cl   12.99 % Cl                -   %   Cl   -2.93 % -O=Cl₂       Oxygen     7.81 %  O             ______        ______              100.00 %       98.05 % = TOTAL OXIDE Empirical Formula: Pb₆CrCl₆O₆(OH)₂ IMA Status: Approved IMA 1974 Locality: Link to MinDat.org Location Data. Name Origin: Named of Leo Neal Yedlin (1908-1977), micromount mineral collector of New Haven, Connecticut, USA. Name Pronunciation: Yedlinite + Pronunciation Synonym: ICSD 6075   PDF 27-269  

Yedlinite Image

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Yedlinite Crystallography

Axial Ratios: a:c = 1:0.76321 Cell Dimensions: a = 12.868, c = 9.821, Z = 3; V = 1,408.34 Den(Calc)= 5.79 Crystal System: Trigonal - RhombohedralH-M Symbol ( 3) Space Group: R 3 X Ray Diffraction: By Intensity(I/I_o): 2.952(1), 2.622(0.68), 4.506(0.65), Crystal Structure:

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Wood M M , McLean W J , Laughon R B , American Mineralogist , 59 (1974) p.1160-1165, The crystal structure and composition of yedlinite

 

Physical Properties of Yedlinite

Cleavage: {1120} Distinct Color: Red violet. Density: 5.85 Diaphaneity: Transparent to Translucent Fracture: Sectile - Curved shavings or scrapings produced by a knife blade, (e.g. graphite). Hardness: 2.5 - Finger Nail Luster: Vitreous (Glassy) Streak: white  

Optical Properties of Yedlinite

Gladstone-Dale: CI meas= -0.074 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.086 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1886,KPDmeas= 0.1867,KC= 0.1737
Ncalc = 2.01 - 2.02 Optical Data: Uniaxial (-), e=2.059, w=2.125, bire=0.0660.  

Calculated Properties of Yedlinite

Electron Density: Bulk Density (Electron Density)=4.89 gm/cc
note: Specific Gravity of Yedlinite =5.85 gm/cc.
Fermion Index: Fermion Index = 0.17
Boson Index = 0.83 Photoelectric: PE_Yedlinite =1,396.88 barns/electron
U=PE_Yedlinite x rElectron Density=6,825.05 barns/cc.
Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Yedlinite is Not Radioactive  

Yedlinite Classification

Dana Class: 10.06.03.01 (10)Oxyhalides and Hydroxyhalides   (10.06)where Am Bn (O,OH)p Xq   (10.06.03)Dana Group  

10.06.03.01 Yedlinite Pb6CrCl6(O,OH)8 R 3 3

Strunz Class: 03.DB.50 03 - HALIDES   03.D - Oxyhalides, Hydroxyhalides and Related Double Halides   03.DB -With Pb, Cu, etc.  

03.DB.50 Yedlinite Pb6CrCl6(O,OH)8 R 3 3

 

Other Yedlinite Information

References: PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) See Also: Links to other databases for Yedlinite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST
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