Matlockite Mineral Data

Matlockite Mineral Data
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General Matlockite Information

Help on Chemical Formula: Chemical Formula: PbFCl
Help on Composition: Composition: Molecular Weight = 261.65 gm
   Lead      79.19 %  Pb   85.30 % PbO
   Chlorine  13.55 %  Cl   13.55 % Cl
               -   %   Cl   -3.06 % -O=Cl2   
   Fluorine   7.26 %  F     7.26 % F
               -   %   F    -3.06 % -O=F2    
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: PbFCl
Help on Environment: Environment: Secondary mineral.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1852
Help on Locality: Locality: Cromford, near Matlock, Derbyshire. Ancient lead slags at Laurium, Greece. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named from its locality.
Help on Name Pronunciation: Name Pronunciation: Matlockite + Pronunciation Say MATLOCKITE
Help on Synonym: Synonym: ICSD 39165
  PDF 26-311
 

Matlockite Image

Click Here for Larger Matlockite Image in a New Browser Window Images:
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Matlockite

Comments: Pale cream colored rosettes of matlockite crystals on matrix.
Location: Laurium, Greece. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Matlockite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:1.76301
Help on Cell Dimensions: Cell Dimensions: a = 4.11, c = 7.246, Z = 2; V = 122.40 Den(Calc)= 7.10
Help on Crystal System: Crystal System: Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: P 4/nmm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.574(1), 2.906(0.45), 3.617(0.4),
Help on Forms: Forms:

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Forms: ( 1 1 1) ( 0 1 1) ( 1 1 0) ( 0 0 1)

Warning: this large pop-up is very compute intensive and may not work well with some computers.
Click Here for Large Matlockite Structure Window Crystal Structure:

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drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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B - Bonds On/Off
 Help on Above


Wyckoff R W G , Crystal Structures , 1 (1963) p.294-296, Second edition. Interscience Publishers, New York, New York, Note: tetragonal PbFCl structure

 

Physical Properties of Matlockite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Brownish yellow, Colorless, Green yellow, Dark yellow brown.
Help on Density: Density: 7.12
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Crystalline - Coarse - Occurs as well-formed coarse sized crystals.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 2.5-3 - Finger Nail-Calcite
Help on Luminescence: Luminescence: Non-Fluorescent.
Help on Luster: Luster: Adamantine - Pearly
Help on Streak: Streak: white
 

Optical Properties of Matlockite

Help on Dichroism (e): Dichroism (e): colorless.
Help on Dichroism (w): Dichroism (w): colorless.
Help on Optical Data: Optical Data: Uniaxial (-), e=2.04, w=2.15, bire=0.1100.
 

Calculated Properties of Matlockite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.86 gm/cc
note: Specific Gravity of Matlockite =7.10 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.17
Boson Index = 0.83
Help on Photoelectric: Photoelectric: PEMatlockite =1,473.63 barns/electron
U=PEMatlockite x rElectron Density=8,637.30 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Matlockite is Not Radioactive
 

Matlockite Classification
Help on Dana Class: Dana Class: 09.02.11.01 (09)Anhydrous and Hydrated Halides
  (09.02)where A (X)2
  (09.02.11)Matlockite Group
 
09.02.11.01 Matlockite PbFCl P 4/nmm 4/m 2/m 2/m
 
09.02.11.02 Rorisite (Ca,Mg)FCl P 4/nmm 4/m 2/m 2/m
 
09.02.11.03 Zhangpeishanite! BaFCl P 4/mmm 4mm
Help on Strunz Class: Strunz Class: 03.DC.25 03 - HALIDES
  03.D - Oxyhalides, Hydroxyhalides and Related Double Halides
  03.DC -With Pb (As,Sb,Bi), without Cu
 
03.DC.25 Bismoclite BiOCl P 4/nmm 4/m 2/m 2/m
 
03.DC.25 Daubreeite BiO(OH,Cl) P 4/nmm 4/m 2/m 2/m
 
03.DC.25 Matlockite PbFCl P 4/nmm 4/m 2/m 2/m
 
03.DC.25 Rorisite (Ca,Mg)FCl P 4/nmm 4/m 2/m 2/m
 
03.DC.25 Zavaritskite BiOF P 4/nmm 4/m 2/m 2/m
 
03.DC.25 Zhangpeishanite! BaFCl P 4/mmm 4mm
 

Other Matlockite 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 Matlockite :
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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Print or Cut-and-Paste your Matlockite Specimen Label here :

Matlockite

PbFCl
Dana No: 09.02.11.01 Strunz No: 03.DC.25
Locality:

 

Notes: