Yedlinite Mineral Data

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 (1908-1997), micromount mineral collector of New Haven, Connecticut, USA.

Synonym:

ICSD 6075

PDF 27-269

Yedlinite Image

Images:

Yedlinite Diaboleite

Comments: Minute cranberry-colored rounded yedlinite crystal with blue diaboleite on yellow-brown wulfenite.
Location: Mammoth Mine, Tiger, Pinal County, Arizona, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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

$Help on X Ray Diffraction:$ 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

Diaphaniety:

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

Optical Data:

Uniaxial (-), e=2.059, w=2.125, bire=0.0660.

Calculated Properties of Yedlinite

Electron Density:

r_electron=4.89 gm/cc
note: r_Yedlinite=5.85 gm/cc.

Fermion Index

Fermion Index = 0.17079
Boson Index = 0.82921

Photoelectric:

PE_Yedlinite=1,396.88 barns/electron
U=PE_Yedlinite x r_electron=6,825.05 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Yedlinite is Not Radioactive

Yedlinite Classification

Dana Class:

10.6.3.1 (10)Oxyhalides and Hydroxyhalides

(10.6)where Am Bn (O,OH)p Xq

(10.6.3)Dana Group

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

Strunz Class:

III/D.12-90 III - Halogenides

III/D - Oxi-halogenides with Pb - Bi - Sb and related compounds

III/D.12 - Boleite - Yedlinite series

III/D.12-10 Boleite KPb26Ag9Cu24Cl62(OH)48 P m3m 4/m 3 2/m

III/D.12-20 Pseudoboleite Pb5Cu4Cl10(OH)8·2(H2O) I 4/mmm 4/m 2/m 2/m

III/D.12-40 Cumengite Pb21Cu20Cl42(OH)40 I 4/mmm 4/m 2/m 2/m

III/D.12-50 Diaboleite Pb2CuCl2(OH)4 P 4mm 4mm

III/D.12-60 Chloroxiphite Pb3CuCl2(OH)2O2 P 2₁/m 2/m

III/D.12-70 Hematophanite Pb4Fe3O8(OH,Cl) P 4mm 4mm

III/D.12-80 Bideauxite Pb2AgCl3(F,OH)2 F d3m 4/m 3 2/m

III/D.12-90 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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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Yedlinite

Pb6CrCl6(O,OH)8
Dana No: 10.6.3.1 Strunz No: III/D.12-90
Locality:

Notes: