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Mawbyite

Formula:
Pb(Fe
3+
 
,Zn)
 
2
[AsO
 
4
]
 
2
· 2(OH,H
 
2
O)
System:MonoclinicColour:Orange-brown, red-brown
Hardness:4
Name:For Sir Maurice Mawby (1904-1977).
Dimorph of:Carminite


The monoclinic dimorph of Carminite.

Classification of Mawbyite

IMA status:Approved 1988
Strunz 8th edition ID:7/C.31-60
Nickel-Strunz 10th (pending) edition ID:8.CG.15

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
G : With large and medium-sized cations, RO4:H2O = 1:1
Dana 8th edition ID:40.2.9.4

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
2 : AB2(XO4)2·xH2O
Hey's CIM Ref.:20.5.16

20 : Arsenates (also arsenates with phosphate, but without other anions)
5 : Arsenates of Ti and Pb
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Type Occurrence of Mawbyite

Type Locality:Kintore Opencut, Broken Hill, Yancowinna Co., New South Wales, Australia
General Appearance of Type Material:"dogtooth" crystals to .15 mm
Place of Conservation of Type Material:South Australian Museum and Museum of Victoria
Year of Discovery:1989
Geological Setting of type material:Oxidized granular spessartine-quartz rock in a zone of several cubic meters.

Physical Properties of Mawbyite

Lustre:Adamantine
Diaphaneity (Transparency):Transparent, Translucent
Colour:Orange-brown, red-brown
Streak:Orange-yellow
Hardness (Mohs):4
Cleavage:Distinct/Good
{001}
Fracture:Conchoidal
Density (calculated):5.53 g/cm3

Crystallography of Mawbyite

Crystal System:Monoclinic
Cell Parameters:a = 9.05Å, b = 6.27Å, c = 7.58Å
β = 114.57°
Ratio:a:b:c = 1.443 : 1 : 1.209
Unit Cell Volume:V 391.17 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
d-spacingIntensity
4.647 (100)
4.458 (30)
3.245 (100)
3.136 (30)
2.860 (40)
2.724 (70)

Optical Data of Mawbyite

Type:Biaxial (-)
RI values: nα = 1.940 nβ = 2.000 nγ = 2.040
2V:Measured: 80° , Calculated: 76°
Maximum Birefringence:δ = 0.100

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High
Dispersion:relatively weak

Chemical Properties of Mawbyite

Formula:
Pb(Fe
3+
 
,Zn)
 
2
[AsO
 
4
]
 
2
· 2(OH,H
 
2
O)
Essential elements:As, Fe, H, O, Pb
All elements listed in formula:As, Fe, H, O, Pb, Zn

Relationship of Mawbyite to other Species

Member of:Tsumcorite Group
Related Minerals - Nickel-Strunz Grouping):

- +
8.CG.05Cassidyite
Ca
 
2
(Ni
2+
 
,Mg)[PO
 
4
]
 
2
· 2H
 
2
O
8.CG.05Collinsite
Ca
 
2
(Mg,Fe
2+
 
)[PO
 
4
]
 
2
· 2H
 
2
O
8.CG.05Fairfieldite
Ca
 
2
(Mn
2+
 
,Fe
2+
 
)[PO
 
4
]
 
2
· 2H
 
2
O
8.CG.05Gaitite
Ca
 
2
Zn[AsO
 
4
]
 
2
· 2H
 
2
O
8.CG.05Messelite
Ca
 
2
(Fe
2+
 
,Mn
2+
 
)[PO
 
4
]
 
2
· 2H
 
2
O
8.CG.05Parabrandtite
Ca
 
2
Mn
2+
 
[AsO
 
4
]
 
2
· 2H
 
2
O
8.CG.05Talmessite
Ca
 
2
Mg[AsO
 
4
]
 
2
· 2H
 
2
O
8.CG.05β-Uranophane
Ca(UO
 
2
)
 
2
[HSiO
 
4
]
 
2
· 5H
 
2
O
8.CG.05Hillite
Ca
 
2
(Zn,Mg)[PO
 
4
]
 
2
· 2 H
 
2
O
8.CG.10Brandtite
Ca
 
2
(Mn
2+
 
,Mg)[AsO
 
4
]
 
2
· 2H
 
2
O
8.CG.10Roselite
Ca
 
2
(Co
2+
 
,Mg)[AsO
 
4
]
 
2
· 2H
 
2
O
8.CG.10Wendwilsonite
Ca
 
2
(Mg,Co
2+
 
)[AsO
 
4
]
 
2
· 2H
 
2
O
8.CG.10Zincroselite
Ca
 
2
Zn[AsO
 
4
]
 
2
· 2H
 
2
O
8.CG.15Ferrilotharmeyerite
Ca(Fe
3+
 
,Zn)
 
2
[AsO
 
4
]
 
2
· 2(OH,H
 
2
O)
8.CG.15Lotharmeyerite
Ca(Zn,Mn
3+
 
)
 
2
[AsO
 
4
]
 
2
· 2(H
 
2
O,OH)
8.CG.15Mounanaite
PbFe
3+
2
[VO
 
4
]
 
2
· 2(OH,F)
8.CG.15Thometzekite
Pb(Cu,Zn)
 
2
[AsO
 
4
,SO
 
4
]
 
2
· 2(H
 
2
O,OH)
8.CG.15Tsumcorite
Pb(Zn,Fe
3+
 
)
 
2
[AsO
 
4
]
 
2
· 2(H
 
2
O,OH)
8.CG.15Cobaltlotharmeyerite
Ca(Co,Fe
3+
 
,Ni)
 
2
[AsO
 
4
]
 
2
· 2(H
 
2
O,OH)
8.CG.15Cabalzarite
Ca(Mg,Al,Fe
3+
 
)
 
2
[AsO
 
4
]
 
2
· 2(OH,H
 
2
O)
8.CG.15Krettnichite
(Pb,Sr)(Mn
3+
 
,Co)
 
2
[VO
 
4
]
 
2
· 2(OH,H
 
2
O)
8.CG.15Cobalttsumcorite
Pb(Co,Fe
3+
 
,Ni)
 
2
[AsO
 
4
]
 
2
· 2(H
 
2
O,OH)
8.CG.15Nickellotharmeyerite
Ca(Ni,Fe
3+
 
,Co)
 
2
[AsO
 
4
]
 
2
· 2(H
 
2
O,OH)
8.CG.15Manganlotharmeyerite
Ca(Mn
3+
 
,Zn)
 
2
[AsO
 
4
]
 
2
· 2(OH,H
 
2
O)
8.CG.15Schneebergite
(Bi
3+
 
,Ca)(Co,Ni,Fe
3+
 
)
 
2
[AsO
 
4
]
 
2
· 2(OH,H
 
2
O)
8.CG.15Nickelschneebergite
(Bi
3+
 
,Ca)(Ni,Co,Fe
3+
 
)
 
2
[AsO
 
4
]
 
2
· 2(OH,H
 
2
O)
8.CG.20Gartrellite
Pb(Cu,Fe
3+
 
,Zn)
 
2
[AsO
 
4
,SO
 
4
]
 
2
· 2(H
 
2
O,OH)
8.CG.20Helmutwinklerite
Pb(Zn,Cu)
 
2
[AsO
 
4
]
 
2
· 2H
 
2
O
8.CG.20Zincgartrellite
Pb(Zn,Fe
3+
 
,Cu)
 
2
[AsO
 
4
]
 
2
· 2(H
 
2
O,OH)
8.CG.20Rappoldite
Pb(Co,Ni,Zn)
 
2
[AsO
 
4
]
 
2
· 2H
 
2
O
8.CG.20Phosphogartrellite
Pb(Cu,Fe
3+
 
)
 
2
[PO
 
4
,AsO
 
4
]
 
2
· 2(H
 
2
O,OH)
8.CG.20Lukrahnite
Ca(Cu,Zn)(Fe
3+
 
,Zn)[AsO
 
4
]
 
2
· 2(H
 
2
O,OH)
8.CG.25Pottsite
HPbBi(VO
 
4
)
 
2
·2H
 
2
O
8.CG.35Nickeltalmessite
Ca
 
2
Ni(AsO
 
4
)
 
2
·2H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
20.5.1Cafarsite
Ca
 
8
(Ti,Fe,Fe,Mn)
 
6-7
(AsO
 
3
)
 
12
·4H
 
2
O
20.5.2Schultenite
PbHAsO
 
4
20.5.3Duftite
PbCu[OH|AsO
 
4
]
20.5.4Bayldonite
Cu
 
3
Pb[OH|AsO
 
4
]
 
2
20.5.5Philipsbornite
PbAl
 
3
[(OH)
 
5
|(AsO
 
4
)
 
2
] · H
 
2
O
20.5.6Arsendescloizite
PbZn[OH|AsO
 
4
]
20.5.7Helmutwinklerite
Pb(Zn,Cu)
 
2
[AsO
 
4
]
 
2
· 2H
 
2
O
20.5.8Thometzekite
Pb(Cu,Zn)
 
2
[AsO
 
4
,SO
 
4
]
 
2
· 2(H
 
2
O,OH)
20.5.9Caryinite
(Na,Pb)(Ca,Na)(Ca,Mn
2+
 
)(Mn
2+
 
,Mg,Fe
3+
 
)
 
2
[AsO
 
4
]
 
3
20.5.10Ludlockite
PbFe
3+
4
As
3+
10
O
 
22
20.5.11Gabrielsonite
PbFe[OH|AsO
 
4
]
20.5.12Carminite
PbFe
3+
2
[OH|AsO
 
4
]
 
2
20.5.13Segnitite
PbFe
3+
3
[(OH,H
 
2
O)
 
6
|(AsO
 
4
)
 
2
]
20.5.14Tsumcorite
Pb(Zn,Fe
3+
 
)
 
2
[AsO
 
4
]
 
2
· 2(H
 
2
O,OH)
20.5.15Jamesite
Pb
 
2
Zn(Fe
2+
 
,Zn)
 
2
Fe
3+
4
[(OH)
 
10
|(AsO
 
4
)
 
4
]
20.5.17Arsenbrackenbuschite

Other Names for Mawbyite

Synonyms:
IMA1988-049
Other Languages:
German:Mawbyit
Russian:Мобиит
Spanish:Mawbyita

Other Information

Fluorescence in UV light:none
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Mawbyite

Reference List:Pring, A., McBriar, E. M. & Birch, W. D. (1989): Mawbyite, a new arsenate of lead and iron related to tsumcorite and carminite, from Broken Hill, New South Wales.: American Mineralogist: 74: 1377-1381.

Mineralogical Magazine: 61: 685-691.

European Journal of Mineralogy (1998): 10: 179-206.

Internet Links for Mawbyite

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    Localities for Mawbyite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Australia
     
    • New South Wales
      • Yancowinna Co.
        • Broken Hill
    AM 1989, 1377-81
    [UKJMM 19:28]
    • Western Australia
      • Pilbara Region
        • Ashburton Shire
          • Ashburton Downs
            • Anticline prospect
    Australian J. Mineralogy 13(1),31-39(2007)
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Ústí Region
        • Krušné Hory Mts (Erzgebirge)
          • Dubí
    No reference listed
    France
     
    • Auvergne
      • Allier
        • Ébreuil
          • Échassières
    Le Règne Minéral, (33), 5-25.
    Germany
     
    • Baden-Württemberg
      • Black Forest
        • Emmendingen
    K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
        • Gengenbach
          • Haigerach valley
    Wittern,A. (1995) Mineralien finden im Schwarzwald
        • Lahr
          • Reichenbach
            • Schuttertal
    Lapis 21(12), 42-43 (1996)
        • Wolfach
          • Oberwolfach
            • Rankach valley
    Walenta, K. (1992): Die Mineralien des Schwarzwaldes. Chr. Weise Verlag, München, 336 pp. (in German); Blaß, G. & Graf, H. W. (1997): Neufunde von bekannten Fundorten (19. Folge). - Mineralien-Welt, 8 (5), 32-36.
    • Saxony
      • Erzgebirge
        • Oberwiesenthal
          • Niederschlag
    Lapis, 19 (4), 13-22+50.
        • Schneeberg District
    [MinRec 33:351]
          • Wolfgang Maaßen Mine field
    Neues Jahrb. Mineral. Mon. 558-576
    Greece
     
    • Attikí (Attica; Attika) Prefecture
      • Lavrion (Laurion; Laurium) District
        • Lavrion District Mines
          • Agios Konstantinos [St Constantine] (Kamariza)
            • Kamariza Mines (Kamareza Mines)
    No reference listed
    Namibia
     
    • Otjikoto (Oshikoto) Region
      • Tsumeb
    XRD and EDS confirmed by Terry Seward.
    Portugal
     
    • Viseu District
      • São Pedro do Sul
        • Manhouce
    Analysed specimen found by Christian Rewitzer
    Analysed specimen found by Christian Rewitzer
    UK
     
    • England
      • Cumbria
        • North and Western Region (Cumberland)
          • Caldbeck Fells
    Journal of The Russell Society, Volume 9, 2006
    Mineral and/or Locality
    Google
     
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 24th Oct 2009 04:17:10