Mounanaite Mineral Data + Say MOUNANAITE


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General Mounanaite Information

Help on Chemical  Formula: Chemical Formula: PbFe+++2(VO4)2(OH)2
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: PbFe3+2(VO4)2(OH)2
Help on Environment: Environment: Seconary mineral in a U-V ore deposit.
Help on IMA Status: IMA Status: Approved IMA 1969
Help on Locality: Locality: Mounana mine, Franceville, Haute Ogooue, Gabon. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Synonym: Synonym: ICSD 76616
  PDF 22-657
 

Mounanaite Image

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Mounanaite

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

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Mounanaite   Francevillite

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

Mounanaite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.7245:1:0.7258
Help on Cell Dimensions: 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
Help on Crystal System: Crystal System: Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 4.66(1), 2.77(0.8), 4.56(0.8),
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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

Help on Color: Color: Brownish red.
Help on Density: Density: 4.85
Help on Diaphaniety: Diaphaniety: Translucent
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Habit: Habit: Twinning Common - Crystals are usually twinned.
 

Optical Properties of Mounanaite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.115 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.096 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2295,KPDmeas= 0.2247,KC= 0.2539
Help on Optical Data: Optical Data: Biaxial (?), b=2.09
Help on Pleochroism (x): Pleochroism (x): brown red.
Help on Pleochroism (z): Pleochroism (z): brown yellow.
 

Calculated Properties of Mounanaite

Help on Electron Density: Electron Density:

relectron=4.27 gm/cc
note: rMounanaite =4.75 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.0832
Boson Index = 0.9168
Help on Photoelectric: Photoelectric:

PEMounanaite = 616.79 barns/electron
U=PEMounanaite x relectron=2,634.23 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Mounanaite is Not Radioactive

 

Mounanaite Classification

Help on  Dana Class: Dana Class: 41.10.7.1 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.10)where (A++ B++)3 (XO4)2 Zq
  (41.10.7)Dana Group
 
41.10.7.1 Mounanaite PbFe2(VO4)2(OH)2 P1 1
 
41.10.7.2 Krettnichite! PbMn2(VO4)2(OH)2 C 2/m 2/m
Help on  Strunz Class: Strunz Class: VII/B.29-80 VII - Phosphates, Arsenates and Vanadates
  VII/B - Waterfree phosphates with unfamiliar anions F, Cl, O, OH. cations of medium and big size: Mg, Cu, Zn, and Ca, Na, K, Ba, Pb
  VII/B.29 - Bjarebyite group
 
VII/B.29-10 Penikisite BaMg2Al2(PO4)3(OH)3 P1 1
 
VII/B.29-20 Kulanite Ba(Fe,Mn,Mg)2Al2(PO4)3(OH)3 P 21/m 2/m
 
VII/B.29-30 Bjarebyite (Ba,Sr)(Mn,Fe,Mg)2Al2(PO4)3(OH)3 P 21/m 2/m
 
VII/B.29-35 Johntomaite! Ba(Fe,Ca,Mn)2Fe2(PO4)3(OH)3 P 21/m 2/m
 
VII/B.29-40 Perloffite Ba(Mn,Fe)2Fe2(PO4)3(OH)3 P 21/m 2/m
 
VII/B.29-50 Jagowerite BaAl2(PO4)2(OH)2 P1 1
 
VII/B.29-60 Vesignieite Cu3Ba(VO4)2(OH)2 C 2/m 2/m
 
VII/B.29-70 Drugmanite Pb2(Fe,Al)H(PO4)2(OH)2 P 21/a 2/m
 
VII/B.29-80 Mounanaite PbFe2(VO4)2(OH)2 P1 1
 

Other Mounanaite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: 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 - 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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Mounanaite

PbFe+++2(VO4)2(OH)2
Dana No: 41.10.7.1 Strunz No: VII/B.29-80
Locality:

 

Notes:

 

 
   
 
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