Fiedlerite Mineral Data

[Content and History] [Recent Issues] [Back Issues] [Subscriptions] [Contacts]
See Also: [Diamond Crystals] [Excalibur Minerals] [Hudson Institute] [Minerals on CDROM]
Mineral News was founded some twenty years ago and has developed a following of
avid mineral collectors seeking timely information about new finds and other items
of interest to the collector community. Articles are solicited from collector and scientific authors.

General Fiedlerite Information

Chemical Formula:

Pb3Cl4F(OH)2

Composition:

Molecular Weight = 816.42 gm

Hydrogen 0.25 % H 2.21 % H₂O

Lead 76.14 % Pb 82.02 % PbO

Chlorine 17.37 % Cl 17.37 % Cl

- % Cl -3.92 % -O=Cl₂

Oxygen 3.92 % O

Fluorine 2.33 % F 2.33 % F

- % F -0.98 % -O=F₂

______ ______

100.00 % 99.02 % = TOTAL OXIDE

Empirical Formula:

Pb₃Cl₄F(OH)₂

Environment:

Secondary mineral from smelting activities.

IMA Status:

Valid Species (Pre-IMA) 1887

Locality:

Ancient lead slags at Laurium, Greece. Link to MinDat.org Location Data.

Name Origin:

Named for K.G. Fiedler, superintendant of the Laurion mines.

Name Pronunciation:

Fiedlerite + Pronunciation

Fiedlerite Image

Images:

Fiedlerite

Comments: Clear tabular crystals of fiedlerite on matrix.
Location: Laurium, Greece. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Fiedlerite Crystallography

Axial Ratios:

a:b:c =1.0657:1:0.9044

Cell Dimensions:

a = 8.574, b = 8.045, c = 7.276, Z = 2; alpha = 89.96°, beta = 102.05°, gamma = 103.45° V = 477.36 Den(Calc)= 5.68

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.55(1), 3.89(1), 2.81(0.8),

Forms:

Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize
Keyboard
S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu
Help on Above

Forms: ( 2 1 0) ( 2 0 1) ( 2 1 1) ( 3 1 0) ( 1 1 1) ( 1 0 0) ( 0 0 1)

Warning: this large pop-up is very compute intensive and may not work well with some computers.

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Merlino S , Pasero M , Perchiazzi N , Mineralogical Magazine , 58 (1994) p.69-78, Fiedlerite: revised chemical formula, [Pb3Cl4F(OH)*H2O], OD description and crystal, structure refinement of the two MDO polytypes, Locality: Baratti, Italy, Note: 1A polytype

View Additional jPOWD Structure files for Fiedlerite
[1]

Physical Properties of Fiedlerite

Cleavage:

{001} Distinct, {100} Distinct

Color:

Colorless, White.

Density:

5.88

Diaphaneity:

Translucent

Hardness:

3.5 - Copper Penny

Luster:

Adamantine

Streak:

white

Optical Properties of Fiedlerite

Gladstone-Dale:

CI meas= -0.025 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.059 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1828,KPDmeas= 0.1769,KC= 0.1726
Ncalc = 1.98 - 2.01

Optical Data:

Biaxial (-), a=1.98, b=2.04, g=2.1, bire=0.1200

Calculated Properties of Fiedlerite

Electron Density:

Bulk Density (Electron Density)=4.91 gm/cc
note: Specific Gravity of Fiedlerite =5.88 gm/cc.

Fermion Index:

Fermion Index = 0.16
Boson Index = 0.84

Photoelectric:

PE_Fiedlerite=1,400.49 barns/electron
U=PE_Fiedlerite x rElectron Density=6,878.99 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Fiedlerite is Not Radioactive

Fiedlerite Classification

Dana Class:

10.03.02.01 (10)Oxyhalides and Hydroxyhalides

(10.03)where (A)3 (O,OH)2 Xq

(10.03.02)Dana Group

10.03.02.01 Fiedlerite Pb3Cl4F(OH)2 P1 1

Strunz Class:

03.DC.10 03 - HALIDES

03.D - Oxyhalides, Hydroxyhalides and Related Double Halides

03.DC -With Pb (As,Sb,Bi), without Cu

03.DC.10 Fiedlerite Pb3Cl4F(OH)2 P1 1

Other Fiedlerite Information

References:

NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Fiedlerite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - MinMax(Deutsch)
12 - MinMax(English)
13 - Mineralienatlas (Deutsch)
14 - QUT Mineral Atlas
15 - Ruff.Info

Search for Fiedlerite using:

[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Fiedlerite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Diamond Dan Publications

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Fiedlerite Mineral Data :

Ask about Fiedlerite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Fiedlerite Specimen Label here :

Fiedlerite

Pb3Cl4F(OH)2
Dana No: 10.03.02.01 Strunz No: 03.DC.10
Locality:

Notes: