Mounanaite Mineral Data

General Mounanaite Information

Chemical Formula:

PbFe+++2(VO4)2(OH)2

Composition:

Molecular Weight = 582.79 gm

Vanadium 17.48 % V 31.21 % V₂O₅

Iron 19.17 % Fe 27.40 % Fe₂O₃

Hydrogen 0.35 % H 3.09 % H₂O

Lead 35.55 % Pb 38.30 % PbO

Oxygen 27.45 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

PbFe³⁺₂(VO₄)₂(OH)₂

Environment:

Seconary mineral in a U-V ore deposit.

IMA Status:

Approved IMA 1969

Locality:

Mounana mine, Franceville, Haute Ogooue, Gabon. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Name Pronunciation:

Mounanaite + Pronunciation

Synonym:

ICSD 76616

PDF 22-657

Mounanaite Image

Images:

Mounanaite

Comments: Yellow crystal of mounanaite on matrix.
Location: Mounana, Haut-Ogoue, Gabon. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Images:

Mounanaite Francevillite

Comments: Stout, yellow, transparent, prismatic, striated crystals of francevillite on brownish red mounanaite matrix.
Location: Mounana mine, Franceville, Haut-OgoouÃ©, Gabon. Scale: Picture size 1.5 cm.
© Paul M. Schumacher

Mounanaite Crystallography

Axial Ratios:

a:b:c =0.7245:1:0.7258

Cell Dimensions:

a = 5.55, b = 7.66, c = 5.56, Z = 1; alpha = 111.02°, beta = 112.12°, gamma = 94.15° V = 203.87 Den(Calc)= 4.75

Crystal System:

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

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

By Intensity(I/I_o): 4.66(1), 2.77(0.8), 4.56(0.8),

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

Krause W , Belendorff K , Bernhardt H J , McCammon C A , Effenberger H , Mikenda W , European Journal of Mineralogy , 10 (1998) p.179-206, Crystal chemistry of the tsumcorite-group minerals. New data on ferrilotharmeyerite,, tsumcorite, thometzekite, mounanaite, helmutwinklerite, and a redefinition of gartrellite

Physical Properties of Mounanaite

Color:

Brownish red.

Density:

4.85

Diaphaneity:

Translucent

Habit:

Tabular - Form dimensions are thin in one direction.

Habit:

Twinning Common - Crystals are usually twinned.

Optical Properties of Mounanaite

Gladstone-Dale:

CI meas= 0.115 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.12 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2234,KPDmeas= 0.2247,KC= 0.2539
Ncalc = 2.23 - 2.24

Optical Data:

Biaxial (?), b=2.09

Pleochroism (x):

brown red.

Pleochroism (z):

brown yellow.

Calculated Properties of Mounanaite

Electron Density:

Bulk Density (Electron Density)=4.36 gm/cc
note: Specific Gravity of Mounanaite =4.85 gm/cc.

Fermion Index:

Fermion Index = 0.08
Boson Index = 0.92

Photoelectric:

PE_Mounanaite= 616.79 barns/electron
U=PE_Mounanaite x rElectron Density=2,689.69 barns/cc.

Radioactivity:

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

Mounanaite Classification

Dana Class:

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

(41.10)where (A++ B++)3 (XO4)2 Zq

(41.10.07)Mounanaite Group

41.10.07.01 Mounanaite PbFe2(VO4)2(OH)2 P1 1

41.10.07.02 Krettnichite! PbMn2(VO4)2(OH)2 C 2/m 2/m

Strunz Class:

08.CG.15 08 - PHOSPHATES, ARSENATES, VANADATES

08.C - Phosphates without Additional Anions, with H2O

08.CG -With large and medium-sized cations, RO4:H2O = 1:1

08.CG.15 Cobaltlotharmeyerite! Ca(Co,Fe,Ni)2(AsO4)2(OH,H2O)2 C 2/m 2/m

08.CG.15 Ferrilotharmeyerite Ca(Zn,Cu)(Fe,Zn)(AsO4)2(OH,H2O)2 C 2/m 2/m

08.CG.15 Cabalzarite! Ca(Mg,Al,Fe)2(AsO4)2(H2O,OH)2 C 2/m 2/m

08.CG.15 Mawbyite Pb(FeZn)2(AsO4)2(OH,H2O)2 C 2/m 2/m

08.CG.15 Lotharmeyerite CaZnMn(AsO3OH)4(OH)3 C 2/m,C 2,Cm Mono

08.CG.15 Mounanaite PbFe2(VO4)2(OH)2 P1 1

08.CG.15 Tsumcorite PbZnFe(AsO4)2•(H2O) C 2/m 2/m

08.CG.15 Thometzekite Pb(Cu,Zn)2(AsO4)2•2(H2O) C 2/m 2/m

08.CG.15 Cobalttsumcorite! Pb(Co,Fe)2(AsO4)2(OH,H2O)2 C 2/m 2/m

08.CG.15 Manganlotharmeyerite! Ca(Mn,Mg,)2(AsO4)2(OH,H2O)2 C 2/m 2/m

08.CG.15 Nickellotharmeyerite! Ca(Ni,Fe,Co)2(AsO4)2(OH,H2O)2 C 2/m 2/m

08.CG.15 Krettnichite! PbMn2(VO4)2(OH)2 C 2/m 2/m

08.CG.15 Schneebergite! Bi(Co,Ni)2(AsO4)2(OH,H2O)2 C 2/m 2/m

08.CG.15 Nickelschneebergite! Bi(Ni,Co)2(AsO4)2(OH,H2O)2 C 2/m 2/m

Other Mounanaite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Mounanaite :
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

Search for Mounanaite using:

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

Visit our Advertisers for Mounanaite :

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

Ask about Mounanaite 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 Mounanaite Specimen Label here :

Mounanaite

PbFe+++2(VO4)2(OH)2
Dana No: 41.10.07.01 Strunz No: 08.CG.15
Locality:

Notes: