Mimetite Mineral Data

General Mimetite Information

Chemical Formula:

Pb5(AsO4)3Cl

Composition:

Molecular Weight = 1,488.21 gm

Arsenic 15.10 % As 23.17 % As₂O₅

Lead 69.61 % Pb 74.99 % PbO

Chlorine 2.38 % Cl 2.38 % Cl

- % Cl -0.54 % -O=Cl₂

Oxygen 12.90 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Pb₅(AsO₄)₃Cl

Environment:

Secondary mineral in lead ores.

IMA Status:

Valid Species (Pre-IMA) 1835

Locality:

Treue Freundschaft Mine, Johanngeorgenstadt, Erzgebirge, Saxony, Germany. Link to MinDat.org Location Data.

Name Origin:

From the Greek mimethes - "imitator" , because of its resemblance to pyromorphite.

Name Pronunciation:

Mimetite

Synonym:

Arsenopyromorphite

Campylite

ICSD 64826

Mimetesite

PDF 19-683

Prixite

Mimetite Image

Images:

Mimetite Duftite-alpha

Comments: Mimetite crystals are replaced by Duftite-alpha on a gossanous matrix.
Location: Mt. Bonnie Mine, Northern Territory, Australia. Scale: Crystal size to 3mm.
© John Veevaert

Images:

Mimetite Cerussite

Comments: Creamy white crystal of cerussite measuring 11 x 22 mm in size nestled nicely in a vug which is lined by bright-yellow, lustrous, prismatic mimetite crystals. The mimetites average 5 mm in length.
Location: Tsumeb mine, Tsumeb, Namibia. Scale: 3.5 x 4.5 x 2.5 cm.
© Dan Weinrich

Images:

Mimetite

Comments: Crystals of tan colored Mimetite. The largest crystal is 1 cm across.
Location: Mt. Bonnie Mine, Northen Territory, Austalia. Scale: 2.9 x 1.7 cm.
© John Veevaert

Images:

Mimetite Plumbogummite

Comments: White, fuzzy aggregates of plumbogummite covering lime green mimetite (campylite) crystals.
Location: Caldbeck Fells, Cumbria, England. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Images:

Mimetite Wulfenite

Comments: Gemmy, pale yellow mimetite crystal with brownish-orange wulfenite. Former James and Dawn Minette Collection.
Location: Gem Pocket 1971, Tsumeb, Namibia. Scale: 2 x 1 x 1 cm.
© Rob Lavinsky

Images:

Mimetite Joelbruggerite

Comments: SEM image of a barrel-shaped joëlbruggerite crystal lanced by acicular mimetite. (AmMin, v94:1012).
Location: Black Pine mine, 14.5 km northwest of Philipsburg, Granite County, Montana, USA. Scale: Crystal Size 30 µm across.
© American Mineralogist

Mimetite Crystallography

Axial Ratios:

a:c = 1:0.71128

Cell Dimensions:

a = 10.46, c = 7.44, Z = 2; V = 704.96 Den(Calc)= 7.01

Crystal System:

Hexagonal - DipyramidalH-M Symbol (6/m) Space Group: P 6₃/m

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

By Intensity(I/I_o): 3.06(1), 3.01(0.95), 2.96(0.65),

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

Yongshan D , Hughes J M , Moore P B , The Canadian Mineralogist , 29 (1991) p.369-376, The crystal structures of mimetite and clinomimetite, Pb5(AsO4)3Cl, Locality: Durango, Mexico

Physical Properties of Mimetite

Cleavage:

{1011} Imperfect

Color:

White, Yellow, Orange, Brown, Red.

Density:

7.1 - 7.24, Average = 7.17

Diaphaneity:

Subtransparent to translucent

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

Globular - Spherical, or nearly so, rounded forms (e.g. wavellite).

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Habit:

Reniform - "Kidney like" in shape (e.g.. hematite).

Hardness:

3.5-4 - Copper Penny-Fluorite

Luminescence:

Fluorescent, Short UV=orange, Long UV=orange.

Luster:

Adamantine - Resinous

Streak:

white

Optical Properties of Mimetite

Gladstone-Dale:

CI meas= -0.095 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.12 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1621,KPDmeas= 0.1585,KC= 0.1448
Ncalc = 2.01 - 2.05

Optical Data:

Uniaxial (-), e=2.129, w=2.144, bire=0.0150.

Calculated Properties of Mimetite

Electron Density:

Bulk Density (Electron Density)=5.99 gm/cc
note: Specific Gravity of Mimetite =7.17 gm/cc.

Fermion Index:

Fermion Index = 0.15
Boson Index = 0.85

Photoelectric:

PE_Mimetite=1,290.30 barns/electron
U=PE_Mimetite x rElectron Density=7,733.29 barns/cc.

Radioactivity:

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

Mimetite Classification

Dana Class:

41.08.04.02 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen

(41.08)where (A)5 (XO4)3 Zq

(41.08.04)Pyromorphite Group

41.08.04.01 Pyromorphite Pb5(PO4)3Cl P 6₃/m 6/m

41.08.04.02 Mimetite Pb5(AsO4)3Cl P 6₃/m 6/m

41.08.04.03 Vanadinite Pb5(VO4)3Cl P 6₃/m 6/m

41.08.04.04 Hydroxylpyromorphite! Pb5(PO4)3OH P 6₃/m 6/m

Strunz Class:

08.BN.05 08 - PHOSPHATES, ARSENATES, VANADATES

08.B - Phosphates, etc. with Additional Anions, without H2O

08.BN -With only large cations, (OH, etc.):RO4 = 0.33:1

08.BN.05 Alforsite Ba5(PO4)3Cl P 6₃/m 6/m

08.BN.05 Apatite* Ca5(PO4)3(OH,F,Cl) P 6₃/m 6/m

08.BN.05 Belovite-(Ce) (Sr,Ce,Na,Ca)5(PO4)3(OH) P 3 3

08.BN.05 Belovite-(La)! (Sr,La,Ce,Ca)5(PO4)3(F,OH) P 3 3

08.BN.05 Fermorite (Ca,Sr)5(AsO4,PO4)3(OH) P 6₃/m 6/m

08.BN.05 Deloneite-(Ce)! NaCa2SrCe(PO4)3F P 3 3

08.BN.05 Johnbaumite Ca5(AsO4)3(OH) P 6₃/m,P 6₃ Hex

08.BN.05 Apatite-(CaOH) Ca5(PO4)3(OH) P 6₃/m 6/m

08.BN.05 Apatite-(CaCl) Ca5(PO4)3Cl P 6₃/m 6/m

08.BN.05 Carbonate-fluorapatite? Ca5(PO4,CO3)3F P 6₃/m 6/m

08.BN.05 Carbonate-hydroxylapatite? Ca5(PO4,CO3)3(OH) P 6₃/m 6/m

08.BN.05 Clinomimetite Pb5(AsO4)3Cl P 2₁/b 2/m

08.BN.05 Apatite-(CaF) Ca5(PO4)3F P 6₃/m 6/m

08.BN.05 Fluorcaphite! (Ca,Sr,Ce,Na)5(PO4)3F P 6₃ 6

08.BN.05 Hedyphane Ca2Pb3(AsO4)3Cl P 6₃/m 6/m

08.BN.05 Mimetite Pb5(AsO4)3Cl P 6₃/m 6/m

08.BN.05 Apatite-(SrOH) (Sr,Ca)5(PO4)3(F,OH) P 6₃/m 6/m

08.BN.05 Morelandite (Ba,Ca,Pb)5(AsO4,PO4)3Cl P 6₃/m,P 6₃ Hex

08.BN.05 Pyromorphite Pb5(PO4)3Cl P 6₃/m 6/m

08.BN.05 Vanadinite Pb5(VO4)3Cl P 6₃/m 6/m

08.BN.05 Apatite-(CaOH)-M! (Ca,Na)5[(P,S)O4]3(OH,Cl) P 2₁/b 2/m

08.BN.05 IMA2008-068! Ca2Pb3(PO4)3F P 6₃/m 6/m

08.BN.05 Svabite Ca5(AsO4)3F P 6₃/m 6/m

08.BN.05 Kuannersuite-(Ce)! Ba6Na2REE2(PO4)6FCl P 3 3

08.BN.05 Turneaureite Ca5[(As,P)O4]3Cl P 6₃/m 6/m

08.BN.05 Phosphohedyphane! Ca2Pb3(PO4)3Cl P 6₃/m 6/m

08.BN.05 IMA2008-009! Sr5(PO4)3F P 6₃/m 6/m 2/m 2/m

08.BN.05 Hydroxylpyromorphite! Pb5(PO4)3OH P 6₃/m 6/m

Other Mimetite Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(Collectors Book of Fluorescent Minerals) OPTIC PROP.(Mason68)

See Also:

Links to other databases for Mimetite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Amethyst Galleries' Mineral Gallery
5 - Athena
6 - EUROmin Project
7 - Ecole des Mines de Paris
8 - Franklin Minerals(Dunn)
9 - GeoScienceWorld
10 - Glendale Community College
11 - Google Images
12 - Google Scholar
13 - Handbook of Mineralogy (MinSocAm)
14 - Handbook of Mineralogy (UofA)
15 - HyperPhysics
16 - MinDAT
17 - Mineral and Gemstone Kingdom
18 - Mineralienatlas (Deutsch)
19 - Online Mineral Museum
20 - Philatelic Mineralogy
21 - QUT Mineral Atlas
22 - Ruff.Info
23 - WWW-MINCRYST
24 - YupRocks
25 - theimage

Search for Mimetite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Mimetite :

A Bijoux Google Search for Mimetite
Adam's Minerals Google Search for Mimetite
Cape Minerals Google Search for Mimetite
Dakota Matrix Minerals Google Search for Mimetite
Excalibur Mineral Corp. Google Search for Mimetite
Exceptional Minerals Google Search for Mimetite
John Betts Fine Minerals Search for Mimetite
McDougall Minerals Google Search for Mimetite
Mineral News Website Link
Rock and Mineral Shows Google Search for Mimetite
Weinrich Minerals, Inc. Google Search for Mimetite

Ask about Mimetite 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 Mimetite Specimen Label here :

Mimetite

Pb5(AsO4)3Cl
Dana No: 41.08.04.02 Strunz No: 08.BN.05
Locality:

Notes: