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Mounanaite Mineral Data

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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 Name Pronunciation: Name Pronunciation: Mounanaite + Pronunciation Say MOUNANAITE
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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  Francevillite   Mounanaite

Comments: Stout, yellow, transparent, prismatic, striated crystals of francevillite on brownish red mounanaite matrix.
Location: Mounana mine, Franceville, Haut-Ogooué, 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 - Pinacoidal H-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),
 

Physical Properties of Mounanaite

Help on Color: Color: Brownish red.
Help on Density: Density: 4.85
Help on Diaphaneity: Diaphaneity: 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= 0.12 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2234,KPDmeas= 0.2247,KC= 0.2539
Ncalc = 2.23 - 2.24
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: Bulk Density (Electron Density)=4.36 gm/cc
note: Specific Gravity of Mounanaite =4.85 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.08
Boson Index = 0.92
Help on Photoelectric: Photoelectric: PEMounanaite = 616.79 barns/electron
U=PEMounanaite x rElectron Density=2,689.69 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: 41.10.07.01 (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
Help on  Strunz Class: 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

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 - 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

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Mounanaite

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

 

Notes:

 

 
   
 


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