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Mawbyite Mineral Data

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General Mawbyite Information

Help on Chemical  Formula: Chemical Formula: Pb(Fe+++Zn)2(AsO4)2(OH,H2O)2
Help on Composition: Composition: Molecular Weight = 649.02 gm
   Zinc       1.01 %  Zn    1.25 % ZnO
   Iron      16.35 %  Fe   21.03 % FeO
   Arsenic   23.09 %  As   35.41 % As2O5
   Hydrogen   0.28 %  H     2.50 % H2O
   Lead      35.12 %  Pb   37.83 % PbO
   Oxygen    24.16 %  O
            ______        ______ 
            100.00 %       98.03 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb1.1Fe2+1.9Zn0.1(AsO4)2(OH)1.8
Help on Environment: Environment: In an arsenic-rich reaction halo in fractures and cavities in a spessartine-quartz rock in the oxidation zone of a metamorphosed stratiform Pb-Zn orebody.
Help on IMA Status: IMA Status: Approved IMA 1989
Help on Locality: Locality: Kintore open cut, Broken Hill, New South Wales, Australia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Sir Maurice Alan Edgar Mawby (1904-1977), for his contribution to the Australian mining industry.
Help on Name Pronunciation: Name Pronunciation: Mawbyite Say MAWBYITE
Help on Synonym: Synonym: ICSD 85132
  PDF 45-1468
 

Mawbyite Image

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  Mawbyite

Comments: Brown crystalline mawbyite in quartz.
Location: Kintore Open Cut, Broken Hill, New South Wales, Australia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Mawbyite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.4422:1:1.2033
Help on Cell Dimensions: Cell Dimensions: a = 9.066, b = 6.286, c = 7.564, Z = 2; beta = 114.857° V = 391.13 Den(Calc)= 5.51
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.245(1), 4.647(1), 2.724(0.7),
 

Physical Properties of Mawbyite

Help on Cleavage: Cleavage: {001} Good
Help on Color: Color: Light brown, Reddish brown, Pale orange, Orange brown.
Help on Density: Density: 5.5
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Spherical - Spherical, rounded aggregates.
Help on Habit: Habit: Wheat Sheaf - Bundle shaped aggregates resembling wheat sheafs after hand reaping wheat.
Help on Hardness: Hardness: 4 - Fluorite
Help on Luster: Luster: Adamantine
Help on Streak: Streak: orange
 

Optical Properties of Mawbyite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.145 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.143 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1803,KPDmeas= 0.1806,KC= 0.1577
Ncalc = 1.87
Help on Optical Data: Optical Data: Biaxial (-), a=1.94, b=2, g=2.04, bire=0.1000, 2V(Calc)=76, 2V(Meas)=80.
 

Calculated Properties of Mawbyite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.90 gm/cc
note: Specific Gravity of Mawbyite =5.51 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.08
Boson Index = 0.92
Help on Photoelectric: Photoelectric: PEMawbyite = 628.43 barns/electron
U=PEMawbyite x rElectron Density=3,081.61 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Mawbyite is Not Radioactive
 

Mawbyite Classification

Help on  Dana Class: Dana Class: 40.02.09.04 (40)Hydrated Phosphates, etc
  (40.02)where A++ (B++)2 (XO4) � x(H2O)
  (40.02.09)Helmutwinklerite Subgroup
 
40.02.09.01 Tsumcorite PbZnFe(AsO4)2•(H2O) C 2/m 2/m
 
40.02.09.02 Helmutwinklerite PbZn2(AsO4)2•2(H2O) P1 1
 
40.02.09.03 Thometzekite Pb(Cu,Zn)2(AsO4)2•2(H2O) C 2/m 2/m
 
40.02.09.04 Mawbyite Pb(FeZn)2(AsO4)2(OH,H2O)2 C 2/m 2/m
 
40.02.09.05 Rappoldite! Pb(Co,Ni,Zn,)2(AsO4)2•2(H2O) P1 1
 
40.02.09.06 Schneebergite! Bi(Co,Ni)2(AsO4)2(OH,H2O)2 C 2/m 2/m
 
40.02.09.07 Nickelschneebergite! Bi(Ni,Co)2(AsO4)2(OH,H2O)2 C 2/m 2/m
 
40.02.09.08 Cobalttsumcorite! Pb(Co,Fe)2(AsO4)2(OH,H2O)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 Mawbyite Information

Help on References: References: NAME( AntBidBlaNic4) PHYS. PROP.(Am.Min.,Vol.74,p1377-1381,1989) OPTIC PROP.(AntBidBlaNic4)
Help on See Also: See Also: Links to other databases for Mawbyite :
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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Mawbyite

Pb(Fe+++Zn)2(AsO4)2(OH,H2O)2
Dana No: 40.02.09.04 Strunz No: 08.CG.15
Locality:

 

Notes:

 

 
   
 


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