Mawbyite
A valid IMA mineral species
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About Mawbyite
Formula:
PbFe3+2(AsO4)2(OH)2
Fe3+ may be replaced by minor Zn.
Colour:
Orange-brown, red-brown; rarely green
Lustre:
Adamantine
Hardness:
4
Specific Gravity:
5.365 (Calculated)
Crystal System:
Monoclinic
Member of:
Name:
Named in 1989 by Allan Pring E. Maud McBriar and William Birch in honor of Sir Maurice Alan Edgar Mawby (August 31, 1904, Broken Hill, Austalia - August 4, 1977, East Melbourne, Australia) for his contribution to the Australian mining industry and expertise in the minerals from Broken Hill. He was a metallurgist and mining executive. He identified 17 species from Broken Hill that had not previously been reported from there. He was knighted in 1963.
Type Locality:
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.
The monoclinic dimorph of Carminite.
May be confused with arsenbrackebuschite, also a Pb-Fe-arsenate, but which a much higher Pb content.
Unique Identifiers
Mindat ID:
2603
Long-form identifier:
mindat:1:1:2603:7
IMA Classification of Mawbyite
Approved
Approval year:
1988
First published:
1989
Classification of Mawbyite
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
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
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
20 : Arsenates (also arsenates with phosphate, but without other anions)
5 : Arsenates of Ti and Pb
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Mby | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Mawbyite
Adamantine
Transparency:
Transparent, Translucent
Colour:
Orange-brown, red-brown; rarely green
Streak:
Orange-yellow
Hardness:
4 on Mohs scale
Cleavage:
Distinct/Good
{001}, good.
{001}, good.
Fracture:
Conchoidal
Density:
5.365 g/cm3 (Calculated)
Optical Data of Mawbyite
Type:
Biaxial (-)
RI values:
nα = 1.94(2) nβ = 2.00(2) nγ = 2.04(2)
2V:
Measured: 80° (5), Calculated: 76°
Max. Birefringence:
δ = 0.100
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
Surface Relief:
Moderate
Dispersion:
relatively weak
Pleochroism:
Weak
Comments:
brown to reddish brown
Chemistry of Mawbyite
Mindat Formula:
PbFe3+2(AsO4)2(OH)2
Fe3+ may be replaced by minor Zn.
Fe3+ may be replaced by minor Zn.
Element Weights:
Crystallography of Mawbyite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C2/m
Cell Parameters:
a = 9.066(4) Å, b = 6.286(3) Å, c = 7.564(3) Å
β = 114.857(5)°
β = 114.857(5)°
Ratio:
a:b:c = 1.442 : 1 : 1.203
Unit Cell V:
391.13 ų (Calculated from Unit Cell)
Z:
2
Twinning:
“V”-shaped, about {100}, common.
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0014531 | Mawbyite | Kharisun, Taylor M R, Bevan D J M, Rae A D, Pring A (1997) The crystal structure of mawbyite, PbFe2(AsO4)2(OH)2 Mineralogical Magazine 61 685-691 |  | 1997 | Broken Hill, New South Wales, Australia, type specimen | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.647 Å | (100) |
| 4.458 Å | (30) |
| 3.245 Å | (100) |
| 3.136 Å | (30) |
| 2.860 Å | (40) |
| 2.724 Å | (70) |
| 2.546 Å | (50) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47d : [Arsenates, antimonates, selenates, bismuthinates] |
Type Occurrence of Mawbyite
General Appearance of Type Material:
"dogtooth" crystals to .15 mm
Place of Conservation of Type Material:
South Australian Museum, Adelaide, G16062, G16066; Museum Victoria, Melbourne, Australia, M39065, M39068, M39173, M39178.
Geological Setting of Type Material:
Oxidized granular spessartine-quartz rock in a zone of several cubic meters.
Associated Minerals at Type Locality:
Synonyms of Mawbyite
Other Language Names for Mawbyite
Relationship of Mawbyite to other Species
Member of:
Other Members of Tsumcorite Group:
| Alumolukrahnite | Ca[CuAl](AsO4)2(H2O,OH)2 | Tric. 1 : P1 |
| Cabalzarite | CaMg2(AsO4)2 · 2H2O | Mon. 2/m : B2/m |
| Cobaltlotharmeyerite | CaCo2(AsO4)2 · 2H2O | Mon. 2/m : B2/m |
| Cobalttsumcorite | PbCo2(AsO4)2 · 2H2O | Mon. 2/m : B2/m |
| Ferrilotharmeyerite | CaZnFe3+(AsO4)2(OH) · H2O | Mon. 2/m : B2/m |
| Gartrellite | PbCuFe3+(AsO4)2(OH) · H2O | Tric. 1 : P1 |
| Helmutwinklerite | PbZn2(AsO4)2 · 2H2O | Tric. 1 : P1 |
| Kaliochalcite | KCu2(SO4)2[(OH)(H2O)] | Mon. 2/m : B2/m |
| Krettnichite | PbMn3+2(VO4)2(OH)2 | Mon. 2/m : B2/m |
| Lotharmeyerite | CaZn2(AsO4)2 · 2H2O | Mon. 2/m : B2/m |
| Lukrahnite | CaCuFe3+(AsO4)2(OH,H2O)2 | Tric. 1 : P1 |
| Manganlotharmeyerite | CaMn3+2(AsO4)2(OH)2 | Mon. 2/m : B2/m |
| Mounanaite | PbFe3+2(VO4)2(OH)2 | Mon. 2/m : B2/m |
| Natrochalcite | NaCu2(SO4)2(OH) · 2H2O | Mon. 2/m : B2/m |
| Nickellotharmeyerite | CaNi2(AsO4)2 · 2H2O | Mon. 2/m : B2/m |
| Nickelschneebergite | BiNi2(AsO4)2(OH) · H2O | Mon. 2/m : B2/m |
| Nickeltsumcorite | Pb(Ni,Fe3+)2(AsO4)2(H2O,OH)2 | Mon. 2/m : B2/m |
| Phosphogartrellite | PbCuFe3+(PO4)2(OH,H2O)2 | Tric. 1 : P1 |
| Rappoldite | PbCo2(AsO4)2 · 2H2O | Tric. 1 : P1 |
| Schneebergite | BiCo2(AsO4)2(OH) · H2O | Mon. 2/m : B2/m |
| Thometzekite | PbCu2+2(AsO4)2 · 2H2O | Mon. 2/m : B2/m |
| Tsumcorite | PbZn2(AsO4)2 · 2H2O | Mon. 2/m : B2/m |
| Yancowinnaite | PbCuAl(AsO4)2OH · H2O | Tric. 1 : P1 |
| Zincgartrellite | PbZn2(AsO4)2(H2O,OH)2 | Tric. 1 : P1 |
Common Associates
Associations Based on Photo Data:
| 9 photos of Mawbyite associated with Segnitite | PbFe3+3AsO4(AsO3OH)(OH)6 |
| 9 photos of Mawbyite associated with 'Beudantite-Segnitite Series' | |
| 5 photos of Mawbyite associated with Mimetite | Pb5(AsO4)3Cl |
| 4 photos of Mawbyite associated with Carminite | PbFe3+2(AsO4)2(OH)2 |
| 3 photos of Mawbyite associated with Tsumcorite | PbZn2(AsO4)2 · 2H2O |
| 3 photos of Mawbyite associated with Bayldonite | PbCu3(AsO4)2(OH)2 |
| 3 photos of Mawbyite associated with Wulfenite | Pb(MoO4) |
| 2 photos of Mawbyite associated with Mottramite | PbCu(VO4)(OH) |
| 1 photo of Mawbyite associated with Pharmacosiderite | KFe3+4(AsO4)3(OH)4 · 6-7H2O |
| 1 photo of Mawbyite associated with Quartz | SiO2 |
Related Minerals - Strunz-mindat Grouping
| 8.CG. | Fluckite | CaMn2+(AsO3OH)2 · 2H2O |
| 8.CG. | Dondoellite | Ca2Fe(PO4)2 · 2H2O |
| 8.CG. | 'Ca-Huréaulite' | CaMn5(PO4)4 · 4H2O |
| 8.CG. | Alumolukrahnite | Ca[CuAl](AsO4)2(H2O,OH)2 |
| 8.CG.05 | Parabrandtite | Ca2Mn2+(AsO4)2 · 2H2O |
| 8.CG.05 | Talmessite | Ca2Mg(AsO4)2 · 2H2O |
| 8.CG.05 | Collinsite | Ca2Mg(PO4)2 · 2H2O |
| 8.CG.05 | Messelite | Ca2Fe2+(PO4)2 · 2H2O |
| 8.CG.05 | Gaitite | Ca2Zn(AsO4)2 · 2H2O |
| 8.CG.05 | Anorthoroselite | Ca2Co(AsO4)2 · 2H2O |
| 8.CG.05 | Cassidyite | Ca2Ni(PO4)2 · 2H2O |
| 8.CG.05 | Fairfieldite | Ca2Mn2+(PO4)2 · 2H2O |
| 8.CG.05 | Hillite | Ca2Zn(PO4)2 · 2H2O |
| 8.CG.05 | 'Unnamed (Fe2+-analogue of Parabrandtite)' | Ca2Fe2+(AsO4)2 · 2H2O |
| 8.CG.10 | Zincroselite | Ca2Zn(AsO4)2 · 2H2O |
| 8.CG.10 | Roselite | Ca2Co(AsO4)2 · 2H2O |
| 8.CG.10 | Rruffite | Ca2Cu(AsO4)2 · 2H2O |
| 8.CG.10 | Wendwilsonite | Ca2Mg(AsO4)2 · 2H2O |
| 8.CG.10 | Brandtite | Ca2Mn2+(AsO4)2 · 2H2O |
| 8.CG.10 | 'Unnamed (Fe2+-analogue of Brandtite)' | Ca2Fe2+(AsO4)2 · 2H2O |
| 8.CG.15 | Thometzekite | PbCu2+2(AsO4)2 · 2H2O |
| 8.CG.15 | Yancowinnaite | PbCuAl(AsO4)2OH · H2O |
| 8.CG.15 | Schneebergite | BiCo2(AsO4)2(OH) · H2O |
| 8.CG.15 | Cabalzarite | CaMg2(AsO4)2 · 2H2O |
| 8.CG.15 | Nickelschneebergite | BiNi2(AsO4)2(OH) · H2O |
| 8.CG.15 | Lotharmeyerite | CaZn2(AsO4)2 · 2H2O |
| 8.CG.15 | Nickeltsumcorite | Pb(Ni,Fe3+)2(AsO4)2(H2O,OH)2 |
| 8.CG.15 | Magnesiofluckite | CaMg(AsO3OH)2(H2O)2 |
| 8.CG.15 | Krettnichite | PbMn3+2(VO4)2(OH)2 |
| 8.CG.15 | Cobalttsumcorite | PbCo2(AsO4)2 · 2H2O |
| 8.CG.15 | Manganlotharmeyerite | CaMn3+2(AsO4)2(OH)2 |
| 8.CG.15 | Tsumcorite | PbZn2(AsO4)2 · 2H2O |
| 8.CG.15 | Ferrilotharmeyerite | CaZnFe3+(AsO4)2(OH) · H2O |
| 8.CG.15 | Cobaltlotharmeyerite | CaCo2(AsO4)2 · 2H2O |
| 8.CG.15 | Mounanaite | PbFe3+2(VO4)2(OH)2 |
| 8.CG.15 | Nickellotharmeyerite | CaNi2(AsO4)2 · 2H2O |
| 8.CG.20 | Lukrahnite | CaCuFe3+(AsO4)2(OH,H2O)2 |
| 8.CG.20 | Helmutwinklerite | PbZn2(AsO4)2 · 2H2O |
| 8.CG.20 | Phosphogartrellite | PbCuFe3+(PO4)2(OH,H2O)2 |
| 8.CG.20 | Gartrellite | PbCuFe3+(AsO4)2(OH) · H2O |
| 8.CG.20 | Zincgartrellite | PbZn2(AsO4)2(H2O,OH)2 |
| 8.CG.20 | Rappoldite | PbCo2(AsO4)2 · 2H2O |
| 8.CG.25 | Pottsite | (Pb3xBi4-2x)(VO4)4 · H2O (0.8 < x < 1.0) |
| 8.CG.25 | Armellinoite-(Ce) | Ca4Ce4+(AsO4)4 · H2O |
| 8.CG.35 | Nickeltalmessite | Ca2Ni(AsO4)2 · 2H2O |
| 8.CG.55 | Irhtemite | Ca4Mg(AsO4)2(HAsO4)2 · 4H2O |
Fluorescence of Mawbyite
none
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.
Internet Links for Mawbyite
mindat.org URL:
https://www.mindat.org/min-2603.html
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References for Mawbyite
Reference List:
Pring, Allan, Mcbriar, E. Maud, Birch, William D. (1989) Mawbyite, a new arsenate of lead and iron related to tsumcorite and carminite, from Broken Hill, New South Wales. American Mineralogist, 74 (11-12) 1377-1381
Kharisun, Taylor, M. R., Bevan, D. J. M., Rae, A. D., Pring, A. (1997) The crystal structure of mawbyite, PbFe2(AsO4)2(OH)2. Mineralogical Magazine, 61 (408). 685-691 doi:10.1180/minmag.1997.061.408.07
Krause, Werner, Belendorff, Klaus, Bernhardt, Heinz-Jürgen, Mccammon, Catherine, Effenberger, Herta, Mikenda, Werner (1998) Crystal chemistry of the tsumcorite-group minerals. New data on ferrilotharmeyerite, tsumcorite, thometzekite, mounanaite, helmutwinklerite, and a redefinition of gartrellite. European Journal of Mineralogy, 10 (2). 179-206 doi:10.1127/ejm/10/2/0179
Localities for Mawbyite
Showing 32 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Australia (TL) | |
| Pring et al. (1989) |
| Day (1998) | |
| Australian J. Mineralogy 13 (1) |
Austria | |
| Kolitsch et al. (2010) |
Czech Republic | |
| |
Europe | |
| Minceva-Stefanova (2001) | |
France | |
| Uwe Kolitsch (SXRD + SEM-EDS) |
| Cuchet et al. (2000) | |
| SEM-EDS analyses at "Laboratoire Magmas ... |
Germany | |
| Walenta (1992) |
| [Wittern (1995) +1 other reference |
| Walenta (1992) +1 other reference |
| Walenta (1996) |
| SEM-EDS by Günter Blaß |
| Martin et al. (1994) |
| Neues Jahrb. Mineral. Mon. 558-576 |
| Mandarino (2002) |
Greece | |
| Blaß et al. (1998) |
| Branko Rieck collection | |
| |
| Rieck (1999) +1 other reference | |
Namibia | |
| XRD and EDS confirmed by Terry Seward. |
Portugal | |
| Alves et al. (2019) |
| Analysed specimen found by Christian ... |
| Analysed specimen found by Christian ... | |
Spain | |
| Joan Abella i Creus (Joanabellacreus@gmail.com) |
Thailand | |
| Patrice Queneau Collection visual identification. Confirmed. Analyzed by Nicolas Meisser (Naturéum) |
UK | |
| Steve Rust collection |
| - (2006) |
USA | |
| Hawley et al. (1960) |
| Jensen et al. (2012) |
| Silver Coin Mine. Compact Disc. Paul ... |
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Ste Barbe vein, Montmins mining district, Échassières, Vichy, Allier, Auvergne-Rhône-Alpes, France