Kamitugaite
A valid IMA mineral species
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About Kamitugaite
Kamituga
Formula:
PbAl[(UO2)5(PO4)2.38(AsO4)0.62O2(OH)2] · 11.5H2O
Formula inferred from the crystal structure refinement (Plášil 2017).
Colour:
Yellow
Lustre:
Vitreous
Hardness:
3
Specific Gravity:
4.03
Crystal System:
Triclinic
Name:
Named in 1984 by M. Deliens and P. Piret for Kamituga, the mining center of Kivu, near the type locality.
This page provides mineralogical data about Kamitugaite.
Unique Identifiers
Mindat ID:
2148
Long-form identifier:
mindat:1:1:2148:3
GUID
(UUID V4):
(UUID V4):
d6f02f22-530d-4c13-b44e-63351436ebf7
IMA Classification of Kamitugaite
Approved
IMA Formula:
PbAl(UO2)5(PO4)3O2(OH)2(H2O)11.5
Approval year:
1983
First published:
1984
Classification of Kamitugaite
8.ED.15
8 : PHOSPHATES, ARSENATES, VANADATES
E : Uranyl phosphates and arsenates
D : Unclassified
8 : PHOSPHATES, ARSENATES, VANADATES
E : Uranyl phosphates and arsenates
D : Unclassified
42.13.11.1
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
13 : Miscellaneous
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
13 : Miscellaneous
19.10.3
19 : Phosphates
10 : Phosphates of Pb, Th, V and Bi
19 : Phosphates
10 : Phosphates of Pb, Th, V and Bi
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 |
|---|---|---|
| Ktg | 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 Kamitugaite
Vitreous
Transparency:
Transparent
Colour:
Yellow
Streak:
White
Hardness:
3 on Mohs scale
Hardness Data:
Estimated
Density:
4.03 g/cm3 (Measured) 4.47 g/cm3 (Calculated)
Optical Data of Kamitugaite
Type:
Biaxial (-)
RI values:
nα = 1.709 nβ = 1.735 nγ = 1.744
2V:
Measured: 60° , Calculated: 60°
Max Birefringence:
δ = 0.035
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 weak
Pleochroism:
Visible
Comments:
X = colorless, Y = yellow
Comments:
X ≃ b∗; Y ∧ a = 1◦–2◦; Z ⊥ a and b∗.
Chemistry of Kamitugaite
Mindat Formula:
PbAl[(UO2)5(PO4)2.38(AsO4)0.62O2(OH)2] · 11.5H2O
Formula inferred from the crystal structure refinement (Plášil 2017).
Formula inferred from the crystal structure refinement (Plášil 2017).
Crystallography of Kamitugaite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Setting:
P1
Cell Parameters:
a = 9.0296(8) Å, b = 10.9557(8) Å, c = 15.8249(15) Å
α = 89.585(7)°, β = 85.349(8)°, γ = 84.251(7)°
α = 89.585(7)°, β = 85.349(8)°, γ = 84.251(7)°
Ratio:
a:b:c = 0.824 : 1 : 1.444
Unit Cell V:
1,552.48 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 7.95 Å | (100) |
| 3.972 Å | (80) |
| 3.271 Å | (40) |
| 3.175 Å | (40) |
| 15.92 Å | (30) |
| 3.493 Å | (30) |
| 4.307 Å | (25) |
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] | |
| 47d : [Arsenates, antimonates, selenates, bismuthinates] | |
| 47f : [Uranyl (U⁶⁺) minerals] |
Type Occurrence of Kamitugaite
General Appearance of Type Material:
Thin plates with a maximum length of 0.5 mm.
Place of Conservation of Type Material:
Royal Museum of Central Africa, Tervuren, Belgium, RMG13985, RMG13986
Geological Setting of Type Material:
Quartz-albite-muscovite pegmatite.
Associated Minerals at Type Locality:
Reference:
Deliens, M., Piret, P. (1984) La kamitugaïte, PbAl(UO2)5[(P,As)O4]2(OH)9.9,5 H2O, nouveau minéral de Kobokobo, Kivu, Zaïre. Bulletin de la Société française de Minéralogie et de Cristallographie: 107: 15-19.
Synonyms of Kamitugaite
Other Language Names for Kamitugaite
German:Kamitugait
Spanish:Kamitugaita
Common Associates
Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
| 8.ED.05 | Moreauite | Al3(UO2)(PO4)3(OH)2 · 13H2O |
| 8.ED.10 | Asselbornite | Pb(BiO)3(UO2)4(AsO4)2(OH)7 · 4H2O |
| 8.ED.10 | Metalodèvite | Zn(UO2)2(AsO4)2 · 10H2O |
| 8.ED.10 | Šreinite | Pb(BiO)3(UO2)4(PO4)2(OH)7 · 4H2O |
| 8.ED.20 | Nielsbohrite | K(UO2)3(AsO4)(OH)4 · H2O |
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 Kamitugaite
mindat.org URL:
https://www.mindat.org/min-2148.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
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References for Kamitugaite
Reference List:
Localities for Kamitugaite
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) | |
| |
USA | |
|
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Kobokobo pegmatite, Shabunda Territory, South Kivu, DR Congo