Masuyite
A valid IMA mineral species - grandfathered
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About Masuyite
Formula:
Pb(UO2)3O3(OH)2 · 3H2O
Colour:
Red-orange, orange, brownish orange.
Specific Gravity:
5.08
Crystal System:
Orthorhombic
Name:
After Gustave Masuy (born Brugge, Belgium, on February 9th 1905 and passed away in Brussels on June 9th 1945), Belgian geologist.
Might actually represent two different species (cf. Deliens & Piret, 1996). The crystal structure of masuyite was determined by Burns & Hanchar (1999).
Unique Identifiers
Mindat ID:
2589
Long-form identifier:
mindat:1:1:2589:4
GUID
(UUID V4):
(UUID V4):
2ccaead7-5e5d-492b-8523-eb50320d4568
IMA Classification of Masuyite
Approved, 'Grandfathered' (first described prior to 1959)
First published:
1947
Classification of Masuyite
4.GB.35
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
G : Uranyl Hydroxides
B : With additional cations (K, Ca, Ba, Pb, etc.); with mainly UO2(O,OH)5 pentagonal polyhedra
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
G : Uranyl Hydroxides
B : With additional cations (K, Ca, Ba, Pb, etc.); with mainly UO2(O,OH)5 pentagonal polyhedra
5.2.2.1
5 : OXIDES CONTAINING URANIUM OR THORIUM
2 : AXO3·xH2O
5 : OXIDES CONTAINING URANIUM OR THORIUM
2 : AXO3·xH2O
7.16.27
7 : Oxides and Hydroxides
16 : Oxides of U
7 : Oxides and Hydroxides
16 : Oxides of U
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 |
|---|---|---|
| Msy | 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 Masuyite
Transparency:
Transparent
Colour:
Red-orange, orange, brownish orange.
Cleavage:
Perfect
{001}, perfect; {010}, good.
{001}, perfect; {010}, good.
Density:
5.08 g/cm3 (Measured)
Optical Data of Masuyite
Type:
Biaxial (-)
RI values:
nα = 1.785 nβ = 1.895 - 1.906 nγ = 1.915 - 1.917
2V:
Measured: 40° to 50°, Calculated: 44°
Max Birefringence:
δ = 0.130 - 0.132
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
extreme
Pleochroism:
Weak
Comments:
X = pale yellow; Y = Z = deep golden yellow
Chemistry of Masuyite
Mindat Formula:
Pb(UO2)3O3(OH)2 · 3H2O
Elements listed:
Crystallography of Masuyite
Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Cell Parameters:
a = 13.98(10) Å, b = 12.17(27) Å, c = 14.56(36) Å
Ratio:
a:b:c = 1.149 : 1 : 1.196
Unit Cell V:
2,477.19 ų (Calculated from Unit Cell)
Z:
2
Twinning:
Very common on {110} or {130} as twin and composition planes, contact and repeated, individuals with parallel to {001}.
Comment:
Space Group: P cna, probable, pseudocell.
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
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Big Balls | Small Balls | Just Balls | Spacefill
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CIF File Best | x | y | z | a | b | c
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Rotation
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Console Off | On | Grey | Yellow
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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) |
|---|---|---|---|---|---|---|---|
| 0005638 | Masuyite | Burns P C, Hanchar J M (1999) The structure of masuyite, Pb[(UO2)3O3(OH)2](H2O)3, and its relationship to protasite The Canadian Mineralogist 37 1483-1491 |  | 1999 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 7.08 Å | (100) |
| 3.52 Å | (70) |
| 3.12 Å | (50) |
| 3.56 Å | (35) |
| 3.48 Å | (21) |
| 2.008 Å | (18) |
| 1.95 Å | (17b) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47f : [Uranyl (U⁶⁺) minerals] |
Type Occurrence of Masuyite
General Appearance of Type Material:
Small (0.1 mm), pseudo-hexagonal, orange-red scales.
Place of Conservation of Type Material:
Type material is lost; Royal Museum of Central Africa, Tervuren, Belgium has neotype material; Harvard University, Cambridge, Massachusetts, USA, 104455, although supplied as a type by Vaes, does not contain lead, found microchemically in original type material.
Associated Minerals at Type Locality:
Reference:
Vaes, J.F. (1947) Six nouveaux minéraux d'urane provenant de Shinkolobwe (Katanga). Annales de la Société Géologique Belge: 70: B212-B229.
Other Language Names for Masuyite
Common Associates
Associated Minerals Based on Photo Data:
| 19 photos of Masuyite associated with Uranophane | Ca(UO2)2(SiO3OH)2 · 5H2O |
| 19 photos of Masuyite associated with Uraninite | UO2 |
| 10 photos of Masuyite associated with Richetite | (Fe3+,Mg)Pb 8.6(UO2)36O36(OH)24 · 41H2O |
| 4 photos of Masuyite associated with Rutherfordine | (UO2)CO3 |
| 3 photos of Masuyite associated with Becquerelite | Ca(UO2)6O4(OH)6 · 8H2O |
| 3 photos of Masuyite associated with Sklodowskite | Mg(UO2)2(SiO3OH)2 · 6H2O |
| 2 photos of Masuyite associated with Fourmarierite | Pb(UO2)4O3(OH)4 · 4H2O |
| 2 photos of Masuyite associated with Wölsendorfite | Pb7(UO2)14O19(OH)4 · 12H2O |
| 2 photos of Masuyite associated with Vandendriesscheite | PbU7O22 · 12H2O |
| 2 photos of Masuyite associated with Saléeite | Mg(UO2)2(PO4)2 · 10H2O |
Related Minerals - Strunz-mindat Grouping
| 4.GB.05 | Agrinierite | K2(Ca,Sr)[(UO2)3O3(OH)2]2 · 5H2O |
| 4.GB.05 | Compreignacite | K2(UO2)6O4(OH)6 · 7H2O |
| 4.GB.05 | Rameauite | K2Ca(UO2)6O6(OH)4 · 6H2O |
| 4.GB.10 | Becquerelite | Ca(UO2)6O4(OH)6 · 8H2O |
| 4.GB.10 | Billietite | Ba(UO2)6O4(OH)6 · 4-8H2O |
| 4.GB.10 | Protasite | Ba(UO2)3O3(OH)2 · 3H2O |
| 4.GB.15 | Richetite | (Fe3+,Mg)Pb 8.6(UO2)36O36(OH)24 · 41H2O |
| 4.GB.20 | Bauranoite | Ba(UO2)2(OH)6 · 1-2H2O |
| 4.GB.20 | Calciouranoite | (Ca,Ba,Pb)U2O7 · 5H2O |
| 4.GB.20 | Metacalciouranoite | (Ca,Ba,Pb,K2)U2O7 · 2H2O |
| 4.GB.25 | Fourmarierite | Pb(UO2)4O3(OH)4 · 4H2O |
| 4.GB.30 | Wölsendorfite | Pb7(UO2)14O19(OH)4 · 12H2O |
| 4.GB.40 | Metavandendriesscheite | PbU7O22 · nH2O n < 12 |
| 4.GB.40 | Vandendriesscheite | PbU7O22 · 12H2O |
| 4.GB.45 | Vandenbrandeite | Cu(UO2)(OH)4 |
| 4.GB.50 | Sayrite | Pb2(UO2)5O6(OH)2 · 4H2O |
| 4.GB.55 | Curite | Pb3(H2O)2[(UO2)4O4(OH)3]2 |
| 4.GB.60 | Iriginite | (UO2)Mo2O7 · 3H2O |
| 4.GB.65 | Uranosphaerite | Bi(UO2)O2(OH) |
| 4.GB.70 | Holfertite | CaxU6+2-xTi(O8-xOH4x) · 3H2O |
| 4.GB.75 | Carlosbarbosaite | (UO2)2Nb2O6(OH)2 · 2H2O |
| 4.GB.80 | Gauthierite | KPb[(UO2)7O5(OH)7] · 8H2O |
| 4.GB.85 | Kroupaite | KPb0.5[(UO2)8O4(OH)10] · 10H2O |
| 4.GB.90 | Leesite | K(H2O)2[(UO2)4O2(OH)5] · 3H2O |
| 4.GB.95 | Shinkolobweite | Pb1.25[U5+(H2O)2(U6+O2)5O8(OH)2](H2O)5 |
| 4.GB.95 | Nollmotzite | Mg[U5+(U6+O2)2O4F3] · 4H2O |
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 Masuyite
mindat.org URL:
https://www.mindat.org/min-2589.html
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Please feel free to link to this page.
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References for Masuyite
Reference List:
Burns, P. C., Hanchar, J. M. (1999) The structure of masuyite, Pb[(UO2)3O3(OH)2](H2O)3, and its relationship to protasite. The Canadian Mineralogist, 37 (6) 1483-1491
Localities for Masuyite
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.
Argentina | |
| Morello (2016) |
Australia | |
| |
Brazil | |
| Pires et al. (2014) |
Canada | |
| King (n.d.) |
| Rich et al. (1977) | |
Czech Republic | |
| Pauliš P. et al. (Kutna Hora, issue 1) |
| Ondruš et al. (1989) +1 other reference |
| Lapis 2002 (7/8) |
| Möhn et al. (12/2021) | |
| Desor (04/2022) |
| Pauliš P. et al. (Kutna Hora, issue 1) |
| Pauliš |
DR Congo (TL) | |
| Deliens +2 other references |
| |
| Wilson (2018) |
Egypt | |
| B.H. Ali et al. (2008) |
Finland | |
| Al-Ani et al. (2011) +2 other references |
| Al-Ani et al. (2011) |
France | |
| P.-C. Guiollard (2002) |
| Caubel (1997) |
| [Le Cahier des Micromonteurs |
| - (1998) | |
India | |
| Current Science |
Italy | |
| Campostrini et al. (2006) |
| Campostrini et al. (2005) |
Poland | |
| Kucha H. 2007: Mineralogia kruszcowa i ... |
Russia | |
| Pavel M. Kartashov analytical data (2014) |
| Pavel M. Kartashov analytical data (2012) |
Switzerland | |
| Meisser (2012) |
| Meisser (2012) |
| Stalder et al. (1998) |
| Stalder et al. (1998) | |
Zambia | |
| Cech et al. (1973) +1 other reference |
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Shinkolobwe Mine, Shinkolobwe, Kambove Territory, Haut-Katanga, DR Congo