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Mawbyite

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Formula:
Pb(Fe3+,Zn)2(AsO4)2 · 2(OH,H2O)
System:
Monoclinic
Colour:
Orange-brown, red-brown
Hardness:
4
Name:
For Sir Maurice Mawby (1904-1977).
Dimorph of:
Tsumcorite Group.
The monoclinic dimorph of Carminite.

May be confused with arsenbrackebuschite, also a Pb-Fe-arsenate, but which a much higher Pb content.

Classification of Mawbyite

Approved 1988
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
40.2.9.4

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
2 : AB2(XO4)2·xH2O
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

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:
1988
Geological Setting of Type Material:
Oxidized granular spessartine-quartz rock in a zone of several cubic meters.

Physical Properties of Mawbyite

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

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 Data:
d-spacingIntensity
4.647 (100)
4.458 (30)
3.245 (100)
3.136 (30)
2.860 (40)
2.724 (70)
2.546 (50)

Optical Data of Mawbyite

Type:
Biaxial (-)
RI values:
nα = 1.940 nβ = 2.000 nγ = 2.040
2V:
Measured: 80° , Calculated: 76°
Max Birefringence:
δ = 0.100
Image 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(Fe3+,Zn)2(AsO4)2 · 2(OH,H2O)
Essential elements:
All elements listed in formula:

Relationship of Mawbyite to other Species

Other Members of Group:
CabalzariteCa(Mg,Al,Fe3+)2(AsO4)2(OH,H2O)2
CobaltlotharmeyeriteCa(Co,Fe3+,Ni)2(AsO4)2 · 2(H2O,OH)
CobalttsumcoritePb(Co,Fe3+,Ni)2(AsO4)2 · 2(H2O,OH)
FerrilotharmeyeriteCa(Fe3+,Zn)2(AsO4)2 · 2(OH,H2O)
GartrellitePb(Cu,Fe3+,Zn)2(AsO4,SO4)2 · 2(H2O,OH)
HelmutwinkleritePb(Zn,Cu)2(AsO4)2 · 2H2O
KaliochalciteKCu2(SO4)2[(OH)(H2O)]
Krettnichite(Pb,Sr)(Mn3+,Co)2(VO4)2 · 2(OH,H2O)
LotharmeyeriteCa(Zn,Mn3+)2(AsO4)2 · 2(H2O,OH)
LukrahniteCa(Cu,Zn)(Fe3+,Zn)(AsO4)2 · 2(H2O,OH)
ManganlotharmeyeriteCa(Mn3+,Zn)2(AsO4)2(OH,H2O)2
MounanaitePbFe23+(VO4)2(OH,F)2
NatrochalciteNaCu2(SO4)2(OH) · 2H2O
Nickelschneebergite(Bi3+,Ca)(Ni,Co,Fe3+)2(AsO4)2 · 2(OH,H2O)
NickeltsumcoritePb(Ni,Fe3+)2(AsO4)2 · (H2O,OH)2
PhosphogartrellitePb(Cu,Fe3+)2(PO4,AsO4)2 · 2(H2O,OH)
RappolditePb(Co,Ni,Zn)2(AsO4)2 · 2H2O
Schneebergite(Bi3+,Ca)(Co,Ni,Fe3+)2(AsO4)2(OH,H2O)2
ThometzekitePb(Cu,Zn)2(AsO4,SO4)2 · 2(H2O,OH)
TsumcoritePb(Zn,Fe3+)2(AsO4)2 · 2(H2O,OH)
YancowinnaitePbCuAl(AsO4)2OH · H2O
ZincgartrellitePb(Zn,Fe3+,Cu)2(AsO4)2 · 2(H2O,OH)
8.CG.05CassidyiteCa2(Ni2+,Mg)(PO4)2 · 2H2O
8.CG.05CollinsiteCa2(Mg,Fe2+)(PO4)2 · 2H2O
8.CG.05FairfielditeCa2(Mn2+,Fe2+)(PO4)2 · 2H2O
8.CG.05GaititeCa2Zn(AsO4)2 · 2H2O
8.CG.05MesseliteCa2(Fe2+,Mn2+)(PO4)2 · 2H2O
8.CG.05ParabrandtiteCa2Mn2+(AsO4)2 · 2H2O
8.CG.05TalmessiteCa2Mg(AsO4)2 · 2H2O
8.CG.05HilliteCa2(Zn,Mg)(PO4)2 · 2 H2O
8.CG.10BrandtiteCa2(Mn2+,Mg)(AsO4)2 · 2H2O
8.CG.10RoseliteCa2(Co2+,Mg)(AsO4)2 · 2H2O
8.CG.10WendwilsoniteCa2Mg(AsO4)2 · 2H2O
8.CG.10ZincroseliteCa2Zn(AsO4)2 · 2H2O
8.CG.10RruffiteCa2Cu(AsO4)2 · 2H2O
8.CG.15FerrilotharmeyeriteCa(Fe3+,Zn)2(AsO4)2 · 2(OH,H2O)
8.CG.15LotharmeyeriteCa(Zn,Mn3+)2(AsO4)2 · 2(H2O,OH)
8.CG.15MounanaitePbFe23+(VO4)2(OH,F)2
8.CG.15ThometzekitePb(Cu,Zn)2(AsO4,SO4)2 · 2(H2O,OH)
8.CG.15TsumcoritePb(Zn,Fe3+)2(AsO4)2 · 2(H2O,OH)
8.CG.15CobaltlotharmeyeriteCa(Co,Fe3+,Ni)2(AsO4)2 · 2(H2O,OH)
8.CG.15CabalzariteCa(Mg,Al,Fe3+)2(AsO4)2(OH,H2O)2
8.CG.15Krettnichite(Pb,Sr)(Mn3+,Co)2(VO4)2 · 2(OH,H2O)
8.CG.15CobalttsumcoritePb(Co,Fe3+,Ni)2(AsO4)2 · 2(H2O,OH)
8.CG.15NickellotharmeyeriteCa(Ni,Fe3+,Co)2(AsO4)2 · 2(H2O,OH)
8.CG.15ManganlotharmeyeriteCa(Mn3+,Zn)2(AsO4)2(OH,H2O)2
8.CG.15Schneebergite(Bi3+,Ca)(Co,Ni,Fe3+)2(AsO4)2(OH,H2O)2
8.CG.15Nickelschneebergite(Bi3+,Ca)(Ni,Co,Fe3+)2(AsO4)2 · 2(OH,H2O)
8.CG.20GartrellitePb(Cu,Fe3+,Zn)2(AsO4,SO4)2 · 2(H2O,OH)
8.CG.20HelmutwinkleritePb(Zn,Cu)2(AsO4)2 · 2H2O
8.CG.20ZincgartrellitePb(Zn,Fe3+,Cu)2(AsO4)2 · 2(H2O,OH)
8.CG.20RappolditePb(Co,Ni,Zn)2(AsO4)2 · 2H2O
8.CG.20PhosphogartrellitePb(Cu,Fe3+)2(PO4,AsO4)2 · 2(H2O,OH)
8.CG.20LukrahniteCa(Cu,Zn)(Fe3+,Zn)(AsO4)2 · 2(H2O,OH)
8.CG.25PottsiteHPbBi(VO4)2 · 2H2O
8.CG.35NickeltalmessiteCa2Ni(AsO4)2 · 2H2O
20.5.1CafarsiteCa5.9Mn1.7Fe3Ti3(AsO3)12 · 4-5H2O
20.5.2SchultenitePb(HAsO4)
20.5.3DuftitePbCu(AsO4)(OH)
20.5.4BayldonitePbCu3(AsO4)2(OH)2
20.5.5PhilipsbornitePbAl3(AsO4)2(OH)5 · H2O
20.5.6ArsendescloizitePbZn(AsO4)(OH)
20.5.7HelmutwinkleritePb(Zn,Cu)2(AsO4)2 · 2H2O
20.5.8ThometzekitePb(Cu,Zn)2(AsO4,SO4)2 · 2(H2O,OH)
20.5.9Caryinite(Na,Pb)(Ca,Na)(Ca,Mn2+)(Mn2+,Mg,Fe3+)2(AsO4)3
20.5.10LudlockitePbFe43+As103+O22
20.5.11GabrielsonitePbFe(AsO4)(OH)
20.5.12CarminitePbFe23+(AsO4)2(OH)2
20.5.13SegnititePbFe33+(AsO4)2(OH,H2O)6
20.5.14TsumcoritePb(Zn,Fe3+)2(AsO4)2 · 2(H2O,OH)
20.5.15JamesitePb2Zn(Fe2+,Zn)2Fe43+(AsO4)4(OH)10
20.5.17Arsenbrackenbuschite

Other Names for Mawbyite

Name in Other Languages:
German:Mawbyit
Russian:Мобиит
Simplified Chinese:羟砷铅铁矿
Spanish:Mawbyita
Traditional Chinese:羥砷鉛鐵礦

Other Information

Health Risks:
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

Localities for Mawbyite

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 for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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 (TL)
 
  • New South Wales
    • Yancowinna Co.
      • Broken Hill
AM 1989, 1377-81
[UKJMM 19:28]
  • Western Australia
    • Ashburton Shire
      • Ashburton Downs Station
Australian J. Mineralogy 13(1),31-39(2007)
Austria
 
  • Lower Austria
    • Industrieviertel
      • Bucklige Welt
        • Wiesmath
Kolitsch, U., Bernhardt, F., Brandstätter, F. & Schachinger, T. (2010): 1658) Arsenopyrit, Bariopharmakosiderit, Baryt, Covellin, Jarosit, Karminit?, Mawbyit?, Mimetesit, Philipsbornit, Plumbojarosit, Pyrit, Pyromorphit, Schwefel, Segnitit, Sphalerit und Wulfenit vom Sperkerriegel bei Wiesmath, Bucklige Welt. Pp. 243-245 in Niedermayr et al. (2010): Neue Mineralfunde aus Österreich LIX. Carinthia II, 200./120., 199-260.
Bulgaria
 
  • Vratsa Oblast (Vratza)
    • Balkan Mts (Stara Planina)
Minceva-Stefanova, J. (2001). Arsenate minerals diversity in oxidation zones of the polymetallic stratabound deposits in Western Balkan Mountain. Comptes Rendus de l'Academie Bulgare des Sciences, 54(6), 39.
Czech Republic
 
  • Bohemia (Böhmen; Boehmen)
    • Ústí Region
      • Krušné Hory Mts (Erzgebirge)
        • Dubí (Eichwald)
No reference listed
France
 
  • Auvergne
    • Allier
      • Ébreuil
        • Échassières
Uwe Kolitsch (SXRD + SEM-EDS)
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
      • Niederschlag-Bärenstein District
        • Bärenstein
          • Niederschlag
Lapis, 19 (4), 13-22+50.
      • Schneeberg District
[MinRec 33:351]
        • Wolfgang Maaßen Mine field
Neues Jahrb. Mineral. Mon. 558-576
Greece
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium)
      • Lavrion District Mines
        • Agios Konstantinos [St Constantine] (Kamariza)
Blaß, G., Fabritz, K. H., Mühlbauer, W. and Prachar, I. (1998): … Immer wieder Neues aus Lavrion (2). Mineralien-Welt 9 (6), 48-55 (in German).
No reference listed
Lapis No.7/8 1999 p.70-74; GRÖBNER, J. (2001): Roter Skorodit und weitere ungewöhnliche Arsenate: Die Mineralien des Abbaus 132 der Grube Christiana, Lavrion/Griechenland. Lapis, 26 (11), 13-21.
Namibia
 
  • Otjikoto Region (Oshikoto)
    • 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
      • Caldbeck Fells
Journal of The Russell Society, Volume 9, 2006
USA
 
  • Montana
    • Granite Co.
      • Philipsburg District (Flint Creek District)
        • John Long Mts
          • Black Pine Ridge
Martin Jensen and Tony Nikischer (2012) Some notes on the mineralogy of the Black Pine Mine, Granite County, Montana. Mineral News, 28, #6, 1-10.
Mineral and/or Locality  
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