Furongite
A valid IMA mineral species
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About Furongite
Formula:
Al13(UO2)7(PO4)13(OH)14 · 58H2O
the correct formula is Al4[(UO2)4(PO4)6](OH)2(H2O)19.5 (Dal Bo et al., 2017)
Colour:
Yellow
Lustre:
Vitreous
Hardness:
2 - 3
Specific Gravity:
2.9
Crystal System:
Triclinic
Name:
Named in 1976 using a poetic name for the Hunan Province, China, that includes the type locality.
Type Locality:
The first natural uranyl phosphate with a U:P ratio of 2:3.
The structure is described as containing:
* infinite uranyl phosphate sheets, [(UO2)4(PO4)6]10-, || (101), which comprise "UrO5" pentagonal bipyramids and PO4 tetrahedra which share edges and vertices; their topology is related to that of the anion topology of uranophane
* hydrogen bonds which link the adjacent sheets
* Al-bearing octahedra running through the sheets and connected mainly to free apical oxygen atoms of the phosphate groups; the octahedra join to form remarkable Al2O5(OH)(H2O)5 and Al4O8(OH)2(H2O)10 clusters
The structure is described as containing:
* infinite uranyl phosphate sheets, [(UO2)4(PO4)6]10-, || (101), which comprise "UrO5" pentagonal bipyramids and PO4 tetrahedra which share edges and vertices; their topology is related to that of the anion topology of uranophane
* hydrogen bonds which link the adjacent sheets
* Al-bearing octahedra running through the sheets and connected mainly to free apical oxygen atoms of the phosphate groups; the octahedra join to form remarkable Al2O5(OH)(H2O)5 and Al4O8(OH)2(H2O)10 clusters
Unique Identifiers
Mindat ID:
1621
Long-form identifier:
mindat:1:1:1621:2
GUID
(UUID V4):
(UUID V4):
4599eb16-6894-4f7b-a6ba-8b87a1c8bdcd
IMA Classification of Furongite
Classification of Furongite
8.EB.50
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
42.10.5.1
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
10 : A3(XO4)2Zq·xH2O
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
10 : A3(XO4)2Zq·xH2O
19.11.27
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 |
---|---|---|
Frg | 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 Furongite
Vitreous
Colour:
Yellow
Hardness:
2 - 3 on Mohs scale
Cleavage:
Perfect
Very perfect on {111} and {111}
Very perfect on {111} and {111}
Density:
2.9 g/cm3 (Measured) 2.9 g/cm3 (Calculated)
Optical Data of Furongite
Type:
Biaxial (-)
RI values:
nα = 1.543 - 1.549 nβ = 1.564 - 1.567 nγ = 1.570 - 1.575
2V:
Measured: 65° to 80°, Calculated: 64°
Max Birefringence:
δ = 0.027
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:
Low
Dispersion:
none
Optical Extinction:
Z ∧ {111} ≃ 38°.
Chemistry of Furongite
Mindat Formula:
Al13(UO2)7(PO4)13(OH)14 · 58H2O
the correct formula is Al4[(UO2)4(PO4)6](OH)2(H2O)19.5 (Dal Bo et al., 2017)
the correct formula is Al4[(UO2)4(PO4)6](OH)2(H2O)19.5 (Dal Bo et al., 2017)
Crystallography of Furongite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 12.1685(8) Å, b = 14.1579(6) Å, c = 17.7884(6) Å
α = 79.822(3)°, β = 77.637(4)°, γ = 67.293(2)°
α = 79.822(3)°, β = 77.637(4)°, γ = 67.293(2)°
Ratio:
a:b:c = 0.859 : 1 : 1.256
Unit Cell V:
2746.2 ų
Z:
2
Comment:
also reported as monoclinic; the above data is from Dal Bo et al. (2017)
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
10.2 Å | (100) |
8.62 Å | (80) |
4.310 Å | (50) |
3.639 Å | (40) |
2.868 Å | (35) |
5.553 Å | (30) |
5.096 Å | (30) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 4b: Highly evolved igneous rocks | >3.0 |
34 : Complex granite pegmatites | |
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 Furongite
General Appearance of Type Material:
Tabular crystals and as dense cryptocrystalline aggregates.
Place of Conservation of Type Material:
n.d.
Geological Setting of Type Material:
Oxidation zone of a uranium deposit.
Associated Minerals at Type Locality:
Other Language Names for Furongite
Common Associates
Associated Minerals Based on Photo Data:
2 photos of Furongite associated with Triangulite | Al3(UO2)4(PO4)4(OH)5 · 5H2O |
2 photos of Furongite associated with Kobokoboite | Al6(PO4)4(OH)6 · 11H2O |
1 photo of Furongite associated with Uraninite | UO2 |
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 | Uramphite | (NH4)2(UO2)2(PO4)2 · 6H2O |
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.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 Furongite
Strong somewhat yellowish green fluorescence.
Other Information
Notes:
Radioactive.
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 Furongite
mindat.org URL:
https://www.mindat.org/min-1621.html
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References for Furongite
Reference List:
Fleischer, Michael, Cabri, Louis J., Chao, George Y., Pabst, Adolf (1978) New Mineral Names. American Mineralogist, 63 (3-4) 424-427
Shen, J., Peng, Z. (1981) The crystal structure of furongite. Acta Crystallographica Section A Foundations of Crystallography, 37. 186 doi:10.1107/s0108767381093975
Hawthorne, Frank C., Burke, Ernst A. J., Ercit, T. Scott, Grew, Edward S., Grice, Joel D., Jambor, John L., Puziewicz, Jacek, Roberts, Andrew C., Vanko, David A. (1988) New Mineral Names. American Mineralogist, 73 (1-2) 189-199
Localities for Furongite
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.
China (TL) | |
| Hunan 230 Laboratory et al. (1976) +1 other reference |
DR Congo | |
| Deliens et al. (1985) +1 other reference |
Spain | |
| www.foro-minerales.com (n.d.) |
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Kobokobo pegmatite, Shabunda Territory, South Kivu, DR Congo