Mundite
A valid IMA mineral species
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About Mundite
Formula:
Al(UO2)3(PO4)2(OH)3 · 5.5H2O
Colour:
Golden yellow
Lustre:
Vitreous
Specific Gravity:
4.295 (Calculated)
Crystal System:
Orthorhombic
Name:
Named after Walter Mund, (22 January 1892, Antwerp, Belgium - 15 August 1956, Leuven, Belgium), professor at the University of Leuven.
This page provides mineralogical data about Mundite.
Unique Identifiers
Mindat ID:
2808
Long-form identifier:
mindat:1:1:2808:6
GUID
(UUID V4):
(UUID V4):
fd0016f3-bd26-46f0-bd4a-c35d7a30f294
IMA Classification of Mundite
Approved
Approval year:
1980
First published:
1981
Classification of Mundite
8.EC.30
8 : PHOSPHATES, ARSENATES, VANADATES
E : Uranyl phosphates and arsenates
C : UO2:RO4 = 3:2
8 : PHOSPHATES, ARSENATES, VANADATES
E : Uranyl phosphates and arsenates
C : UO2:RO4 = 3:2
42.7.13.1
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
7 : (AB)2(XO4)Zq·xH2O
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
7 : (AB)2(XO4)Zq·xH2O
19.11.25
19 : Phosphates
11 : Phosphates of U
19 : Phosphates
11 : Phosphates 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 |
|---|---|---|
| Mud | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Pronunciation of Mundite
Pronunciation:
| Play | Recorded by | Country |
|---|---|---|
| Jolyon Ralph | United Kingdom |
Physical Properties of Mundite
Vitreous
Transparency:
Transparent
Colour:
Golden yellow
Cleavage:
Perfect
{010}, {100}, {001} perfect
{010}, {100}, {001} perfect
Density:
4.295 g/cm3 (Calculated)
Optical Data of Mundite
Type:
Biaxial (-)
RI values:
nα = 1.620 nβ = 1.682(2) nγ = 1.688(2)
2V:
Measured: 33° , Calculated: 32°
Max Birefringence:
δ = 0.068
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:
High
Dispersion:
r < v strong
Pleochroism:
Weak
Comments:
X = b; Y = c; Z = a
Chemistry of Mundite
Mindat Formula:
Al(UO2)3(PO4)2(OH)3 · 5.5H2O
Crystallography of Mundite
Crystal System:
Orthorhombic
Cell Parameters:
a = 17.08(3) Å, b = 30.98(5) Å, c = 13.76 Å
Ratio:
a:b:c = 0.551 : 1 : 0.444
Unit Cell V:
7,280.94 ų (Calculated from Unit Cell)
Z:
16
Morphology:
rectangular plates, flattened on {010}, elongated on {001}
Comment:
Point Group: 2/m 2/m 2/m or mm2; Space Group: Pmcn or P21cn
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 7.80 Å | (100) |
| 5.74 Å | (40) |
| 3.87 Å | (60) |
| 3.37 Å | (70) |
| 3.06 Å | (50) |
| 3.00 Å | (40) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47c : [Carbonates, phosphates, borates, nitrates] | |
| 47f : [Uranyl (U⁶⁺) minerals] |
Type Occurrence of Mundite
Place of Conservation of Type Material:
Royal Museum for Central Africa, Tervuren, Belgium, RMG11888.
Geological Setting of Type Material:
Oxidized zone of a complex granite pegmatite
Associated Minerals at Type Locality:
Reference:
Deliens, M., Piret, P. (1981) Les phosphates d'uranyle et d'aluminium de Kobokobo. V. La mundite, nouveau minéral. Bulletin de Minéralogie: 104: 669-671.
Synonyms of Mundite
Other Language Names for Mundite
Common Associates
Associated Minerals Based on Photo Data:
| 2 photos of Mundite associated with Eylettersite | Th0.75Al3(PO4)2(OH)6 |
| 2 photos of Mundite associated with Threadgoldite | Al(UO2)2(PO4)2(OH) · 8H2O |
Related Minerals - Strunz-mindat Grouping
| 8.EC.05 | Françoisite-(Nd) | (Nd,Ce,Sm)(UO2)3(PO4)2O(OH) · 6H2O |
| 8.EC.05 | Phuralumite | Al2[(UO2)3(PO4)2O(OH)](OH)3(H2O)9 |
| 8.EC.05 | Upalite | Al(UO2)3(PO4)2O(OH) · 7H2O |
| 8.EC.05 | Françoisite-(Ce) | (Ce,Nd,Ca)(UO2)3(PO4)2O(OH) · 6H2O |
| 8.EC.10 | Arsenuranylite | Ca(UO2)4(AsO4)2(OH)4 · 6H2O |
| 8.EC.10 | Dewindtite | H2Pb3(UO2)6O4(PO4)4 · 12H2O |
| 8.EC.10 | Kivuite | Th(UO2)4(PO3OH)2(OH)8 · 7H2O |
| 8.EC.10 | Phosphuranylite | KCa(H3O)3(UO2)7(PO4)4O4 · 8H2O |
| 8.EC.10 | Yingjiangite | K2Ca(UO2)7(PO4)4(OH)6 · 6H2O |
| 8.EC.10 | Renardite | Pb(UO2)4(PO4)2(OH)4 · H2O |
| 8.EC.15 | Dumontite | Pb2(UO2)3O2(PO4)2 · 5H2O |
| 8.EC.15 | Hügelite | Pb2(UO2)3(AsO4)2O2 · 5H2O |
| 8.EC.20 | Metavanmeersscheite | U6+(UO2)3(PO4)2(OH)6 · 2H2O |
| 8.EC.20 | Vanmeersscheite | U6+(UO2)3(PO4)2(OH)6 · 4H2O |
| 8.EC.20 | Arsenovanmeersscheite | U6+(UO2)3(AsO4)2(OH)6 · 4H2O |
| 8.EC.25 | Althupite | AlTh(UO2)7(PO4)4(OH)5O2 · 15H2O |
| 8.EC.35 | Phurcalite | Ca2(UO2)3(PO4)2O2 · 7H2O |
| 8.EC.40 | Bergenite | Ca2Ba4(UO2)9(PO4)6O6 · 16H2O |
Fluorescence of Mundite
Pale green in longwave and shortwave UV
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 Mundite
mindat.org URL:
https://www.mindat.org/min-2808.html
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References for Mundite
Reference List:
Deliens, Michel, Piret, Paul (1981) Les phosphates d'uranyle et d'aluminium de Kobokobo. V. La mundite, nouveau minéral. Bulletin de Minéralogie, 104 (5). 669-671 doi:10.3406/bulmi.1981.7553
Localities for Mundite
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.
DR Congo (TL) | |
| |
Romania | |
| |
Russia | |
|
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Kobokobo pegmatite, Shabunda Territory, South Kivu, DR Congo