Uramphite
A valid IMA mineral species - grandfathered
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About Uramphite
Formula:
(NH4)2(UO2)2(PO4)2 · 6H2O
Colour:
pale green, bottle green
Lustre:
Vitreous
Hardness:
2 - 3
Specific Gravity:
3.7
Crystal System:
Tetragonal
Member of:
Name:
The name reflects its composition: uranyl (ur), ammonium (am) and phosphate (ph) ions.
Unique Identifiers
Mindat ID:
4100
Long-form identifier:
mindat:1:1:4100:9
GUID
(UUID V4):
(UUID V4):
a0ad6b36-979e-4a18-9910-381133d3f9e2
IMA Classification of Uramphite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
(NH4)(UO2)(PO4) · 3H2O
Classification of Uramphite
8.EB.15
8 : PHOSPHATES, ARSENATES, VANADATES
E : Uranyl phosphates and arsenates
B : UO2:RO4 = 1:1
8 : PHOSPHATES, ARSENATES, VANADATES
E : Uranyl phosphates and arsenates
B : UO2:RO4 = 1:1
40.2a.7.1
40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
2a : AB2(XO4)2·xH2O, containing (UO2)2+
40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
2a : AB2(XO4)2·xH2O, containing (UO2)2+
19.11.9
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 |
---|---|---|
Uap | 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 Uramphite
Vitreous
Transparency:
Translucent
Colour:
pale green, bottle green
Streak:
greenish white
Hardness:
2 - 3 on Mohs scale
Cleavage:
Distinct/Good
Distinct in two directions.
Distinct in two directions.
Density:
3.7 g/cm3 (Measured) 3.26 g/cm3 (Calculated)
Optical Data of Uramphite
Type:
Biaxial (-)
RI values:
nα = 1.564 nβ = 1.585 nγ = 1.585
Max Birefringence:
δ = 0.021
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:
Moderate
Dispersion:
r > v strong
Pleochroism:
Visible
Comments:
X = colorless; Y = Z = pale green.
Chemistry of Uramphite
Mindat Formula:
(NH4)2(UO2)2(PO4)2 · 6H2O
Crystallography of Uramphite
Crystal System:
Tetragonal
Class (H-M):
4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:
P4/ncc
Setting:
P4/ncc
Cell Parameters:
a = 7.02(1) Å, c = 18.08(4) Å
Ratio:
a:c = 1 : 2.575
Unit Cell V:
890.99 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Square tablets, to 0.2 mm, in rosettes and coatings
Comment:
synthetic
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) |
---|---|---|---|---|---|---|---|
0009971 | Uramphite | Fitch A N, Fender B E F (1983) The structure of deuterated ammomium uranyl phosphate trihydrate, ND4UO2PO4*3D2O by powder neutron diffraction Acta Crystallographica C39 162-166 | 1983 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
3.78 Å | (10) |
2.22 Å | (9) |
1.694 Å | (8.5) |
2.75 Å | (8) |
2.12 Å | (8) |
3.24 Å | (7) |
1.399 Å | (7) |
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] | |
Stage 10a: Neoproterozoic oxygenation/terrestrial biosphere | <0.6 |
50 : Coal and/or oil shale minerals | <0.36 |
Type Occurrence of Uramphite
Geological Setting of Type Material:
oxidized zone of a uranium-coal deposit
Reference:
Nekrasova Z A (1957) A hydrous uranyl ammonium phosphate (uramphite), NH4(UO2)(PO4)·3H2O. Voprosy Geologii Urana, Atomizdat 1957, 67-72
Other Language Names for Uramphite
Relationship of Uramphite to other Species
Member of:
Other Members of this group:
Abernathyite | K(UO2)(AsO4) · 3H2O | Tet. 4/mmm (4/m 2/m 2/m) : P4/ncc |
Chernikovite | (H3O)2(UO2)2(PO4)2 · 6H2O | Tet. 4/mmm (4/m 2/m 2/m) : P4/nmm |
Lehnerite | Mn2+(UO2)2(PO4)2 · 8H2O | Mon. 2/m |
Meta-ankoleite | K2(UO2)2(PO4)2 · 6H2O | Tet. 4/mmm (4/m 2/m 2/m) : P4/nmm |
Meta-autunite | Ca(UO2)2(PO4)2 · 6H2O | Tet. 4/mmm (4/m 2/m 2/m) |
Metaheinrichite | Ba(UO2)2(AsO4)2 · 8H2O | Mon. 2 : P21 |
Metakahlerite | Fe2+(UO2)2(AsO4)2 · 8H2O | Tric. 1 : P1 |
Metakirchheimerite | Co(UO2)2(AsO4)2 · 8H2O | Tric. 1 : P1 |
Metalodèvite | Zn(UO2)2(AsO4)2 · 10H2O | Tet. 4/m : P42/m |
Metanatroautunite | Na(UO2)(PO4)(H2O)3 | Tet. 4/mmm (4/m 2/m 2/m) : P4/ncc |
Metanováčekite | Mg(UO2)2(AsO4)2 · 8H2O | Tet. 4/m : P4/n |
Metarauchite | Ni(UO2)2(AsO4)2 · 8H2O | Tric. 1 : P1 |
Metasaléeite | Mg(UO2)2(PO4)2 · 8H2O | |
Metatorbernite | Cu(UO2)2(PO4)2 · 8H2O | Tet. 4/m : P4/n |
Metauranocircite | Ba(UO2)2(PO4)2 · 7H2O | Mon. 2 : P21 |
Metauranospinite | Ca(UO2)2(AsO4)2 · 8H2O | Tet. 4/m : P42/n |
Metazeunerite | Cu(UO2)2(AsO4)2 · 8H2O | Tet. 4/m : P42/n |
Natrouranospinite | Na2(UO2)2(AsO4)2 · 5H2O | Tet. 4/mmm (4/m 2/m 2/m) : P4/nmm |
Trögerite | (H3O)(UO2)(AsO4) · 3H2O | Tet. 4/mmm (4/m 2/m 2/m) : P4/nmm |
Uramarsite | (NH4)(UO2)(AsO4) · 3H2O | Tet. 4/mmm (4/m 2/m 2/m) : P4/mmm |
Related Minerals - Strunz-mindat Grouping
8.EB. | Meta-autunite Group | A1-2(UO2)2(TO4)2 · 5-10H2O |
8.EB.05 | Autunite | Ca(UO2)2(PO4)2 · 10-12H2O |
8.EB.05 | Heinrichite | Ba(UO2)2(AsO4)2 · 10H2O |
8.EB.05 | Kahlerite | Fe(UO2)2(AsO4)2 · 12H2O |
8.EB.05 | Hydronováčekite | Mg(UO2)2(AsO4)2 · 12H2O |
8.EB.05 | Saléeite | Mg(UO2)2(PO4)2 · 10H2O |
8.EB.05 | Torbernite | Cu(UO2)2(PO4)2 · 12H2O |
8.EB.05 | Uranocircite | Ba(UO2)2(PO4)2 · 10H2O |
8.EB.05 | Uranospinite | Ca(UO2)2(AsO4)2 · 10H2O |
8.EB.05 | Xiangjiangite | (Fe3+,Al)(UO2)4(PO4)2(SO4)2(OH) · 22H2O |
8.EB.05 | Zeunerite | Cu(UO2)2(AsO4)2 · 12H2O |
8.EB.05 | Metarauchite | Ni(UO2)2(AsO4)2 · 8H2O |
8.EB.05 | Nováčekite | Mg(UO2)2(AsO4)2 · 10H2O |
8.EB.05 | Rauchite | Ni(UO2)2(AsO4)2 · 10H2O |
8.EB.10 | Bassetite | Fe2+(UO2)2(PO4)2 · 10H2O |
8.EB.10 | Lehnerite | Mn2+(UO2)2(PO4)2 · 8H2O |
8.EB.10 | Meta-autunite | Ca(UO2)2(PO4)2 · 6H2O |
8.EB.10 | Metasaléeite | Mg(UO2)2(PO4)2 · 8H2O |
8.EB.10 | Metauranocircite | Ba(UO2)2(PO4)2 · 7H2O |
8.EB.10 | Metauranospinite | Ca(UO2)2(AsO4)2 · 8H2O |
8.EB.10 | Metaheinrichite | Ba(UO2)2(AsO4)2 · 8H2O |
8.EB.10 | Metakahlerite | Fe2+(UO2)2(AsO4)2 · 8H2O |
8.EB.10 | Metakirchheimerite | Co(UO2)2(AsO4)2 · 8H2O |
8.EB.10 | Metanováčekite | Mg(UO2)2(AsO4)2 · 8H2O |
8.EB.10 | Metatorbernite | Cu(UO2)2(PO4)2 · 8H2O |
8.EB.10 | Metazeunerite | Cu(UO2)2(AsO4)2 · 8H2O |
8.EB.10 | Przhevalskite | Pb2(UO2)3(PO4)2(OH)4 · 3H2O |
8.EB.10 | Pseudo-autunite | (H3O)4Ca2(UO2)2(PO4)4 · 5H2O |
8.EB.10 | Metanatroautunite | Na(UO2)(PO4)(H2O)3 |
8.EB.15 | Abernathyite | K(UO2)(AsO4) · 3H2O |
8.EB.15 | Chernikovite | (H3O)2(UO2)2(PO4)2 · 6H2O |
8.EB.15 | Meta-ankoleite | K2(UO2)2(PO4)2 · 6H2O |
8.EB.15 | Natrouranospinite | Na2(UO2)2(AsO4)2 · 5H2O |
8.EB.15 | Trögerite | (H3O)(UO2)(AsO4) · 3H2O |
8.EB.15 | Uramarsite | (NH4)(UO2)(AsO4) · 3H2O |
8.EB.20 | Threadgoldite | Al(UO2)2(PO4)2(OH) · 8H2O |
8.EB.20 | Chistyakovaite | Al(UO2)2(AsO4)2(F,OH) · 6.5H2O |
8.EB.25 | Arsenuranospathite | Al(UO2)2(AsO4)2F · 20H2O |
8.EB.25 | Uranospathite | (Al,◻)(UO2)2(PO4)2F · 20(H2O,F) |
8.EB.30 | Vochtenite | (Fe2+,Mg)Fe3+(UO2)4(PO4)4(OH) · 12-13H2O |
8.EB.35 | Coconinoite | Fe3+2Al2(UO2)2(PO4)4(SO4)(OH)2 · 20H2O |
8.EB.40 | Ranunculite | HAl(UO2)(PO4)(OH)3 · 4H2O |
8.EB.45 | Triangulite | Al3(UO2)4(PO4)4(OH)5 · 5H2O |
8.EB.50 | Furongite | Al13(UO2)7(PO4)13(OH)14 · 58H2O |
8.EB.55 | Sabugalite | HAl(UO2)4(PO4)4 · 16H2O |
8.EB.60 | Horákite | (Bi7O7OH)[(UO2)4(PO4)2(AsO4)2(OH)2] · 3.5H2O |
Fluorescence of Uramphite
fluoresces yellow-green
Other Information
Health Risks:
Radioactive
Internet Links for Uramphite
mindat.org URL:
https://www.mindat.org/min-4100.html
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References for Uramphite
Reference List:
Localities for Uramphite
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).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Kyrgyzstan (TL) | |
| Nekrasova (1957) |
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Tura-Kavak uranium-coal deposit, Minkush, Moldo-Too range, Naryn Region, Kyrgyzstan