Fluellite
A valid IMA mineral species - grandfathered
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About Fluellite
Formula:
Al2(PO4)F2(OH) · 7H2O
Colour:
Colourless, white, yellow
Lustre:
Vitreous
Hardness:
3
Specific Gravity:
2.139 - 2.17
Crystal System:
Orthorhombic
Name:
In allusion to the composition, being a fluate of alumine (French).
This page provides mineralogical data about Fluellite.
Unique Identifiers
Mindat ID:
1565
Long-form identifier:
mindat:1:1:1565:9
GUID
(UUID V4):
(UUID V4):
e7a67826-4722-422f-85f5-d285842618d5
IMA Classification of Fluellite
Approved, 'Grandfathered' (first described prior to 1959)
First published:
1824
Type description reference:
Classification of Fluellite
8.DE.10
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
E : With only medium-sized cations, (OH, etc.):RO4 = 3:1
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
E : With only medium-sized cations, (OH, etc.):RO4 = 3:1
42.6.9.1
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
6 : A2(XO4)Zq·xH2O
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
6 : A2(XO4)Zq·xH2O
22.1.14
22 : Phosphates, Arsenates or Vanadates with other Anions
1 : Phosphates, arsenates or vanadates with fluoride
22 : Phosphates, Arsenates or Vanadates with other Anions
1 : Phosphates, arsenates or vanadates with fluoride
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 |
---|---|---|
Fll | 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 Fluellite
Vitreous
Transparency:
Transparent
Colour:
Colourless, white, yellow
Streak:
White
Hardness:
3 on Mohs scale
Cleavage:
Poor/Indistinct
On {010} and {111}.
On {010} and {111}.
Density:
2.139 - 2.17 g/cm3 (Measured) 2.29 g/cm3 (Calculated)
Optical Data of Fluellite
Type:
Biaxial (+)
RI values:
nα = 1.473 - 1.490 nβ = 1.490 - 1.496 nγ = 1.506 - 1.511
Max Birefringence:
δ = 0.033
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:
none
Chemistry of Fluellite
Mindat Formula:
Al2(PO4)F2(OH) · 7H2O
Crystallography of Fluellite
Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Fddd
Cell Parameters:
a = 11.22 Å, b = 21.15 Å, c = 8.54 Å
Ratio:
a:b:c = 0.53 : 1 : 0.404
Unit Cell V:
2,026.57 ų (Calculated from Unit Cell)
Morphology:
Crystals dipyramidal {111}, often modified by {010}.
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
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Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
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Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
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2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
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) |
---|---|---|---|---|---|---|---|
0000151 | Fluellite | Guy B B, Jeffrey G A (1966) The crystal structure of fluellite, Al2PO4F2(OH).7H2O American Mineralogist 51 1579-1592 | 1966 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
6.48 Å | (100) |
3.24 Å | (70) |
3.09 Å | (60) |
2.667 Å | (60) |
4.96 Å | (50) |
2.868 Å | (50) |
2.763 Å | (50) |
Comments:
Stenna Gwynn mine, Cornwall, England, ICDD 19-38.
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] |
Geological Setting:
In pegmatites
Type Occurrence of Fluellite
General Appearance of Type Material:
Transparent acute rhombic octahedrons
Place of Conservation of Type Material:
National Museum of Natural History, Washington, D.C., USA, C1028.
Associated Minerals at Type Locality:
Reference:
Levy, A. (1824) On a new mineral substance. The Annals of Philosophy: 8: 241-245 (242-243).
Synonyms of Fluellite
Other Language Names for Fluellite
French:Fluate of Alumine
German:Fluellit
Kreuzbergit
Kreuzbergit
Russian:Флюеллит
Simplified Chinese:氟磷铝石
Spanish:Fluellita
Kreuzbergita
Kreuzbergita
Traditional Chinese:氟磷鋁石
Common Associates
Associated Minerals Based on Photo Data:
41 photos of Fluellite associated with Metavariscite | AlPO4 · 2H2O |
37 photos of Fluellite associated with Wavellite | Al3(PO4)2(OH,F)3 · 5H2O |
22 photos of Fluellite associated with Variscite | AlPO4 · 2H2O |
21 photos of Fluellite associated with Quartz | SiO2 |
17 photos of Fluellite associated with Nevadaite | (Cu2+,Al,V3+)6Al8(PO4)8F8(OH)2 · 22H2O |
13 photos of Fluellite associated with Crandallite | CaAl3(PO4)(PO3OH)(OH)6 |
8 photos of Fluellite associated with Minyulite | KAl2(PO4)2F · 4H2O |
8 photos of Fluellite associated with Hewettite | CaV6O16 · 9H2O |
8 photos of Fluellite associated with Aldermanite | [Mg(H2O)6][Na(H2O)2Al3(PO4)2(OH,F)6] · H2O |
6 photos of Fluellite associated with Fluorwavellite | Al3(PO4)2(OH)2F · 5H2O |
Related Minerals - Strunz-mindat Grouping
8.DE. | Kipushite | (Cu,Zn)5Zn(PO4)2(OH)6 · H2O |
8.DE. | Goldhillite | Cu5Zn(AsO4)2(OH)6 · H2O |
8.DE. | Arsenoveszelyite | Cu2Zn(AsO4)(OH)3 · 2H2O |
8.DE.05 | Senegalite | Al2(PO4)(OH)(OH)2 · H2O |
8.DE.15 | Bulachite | Al6(AsO4)3(OH)9(H2O)4 · 2H2O |
8.DE.20 | Zapatalite | Cu3Al4(PO4)3(OH)9 · 4H2O |
8.DE.25 | Ceruleite | Cu2Al7(AsO4)4(OH)13 · 11.5H2O |
8.DE.30 | Veszelyite | (Cu,Zn)2Zn(PO4)(OH)3 · 2H2O |
8.DE.35 | Philipsburgite | Cu5Zn(AsO4)(PO4)(OH)6 · H2O |
8.DE.40 | Juanitaite | (Cu,Ca,Fe)10Bi(AsO4)4(OH)11 · 2H2O |
8.DE.45 | Iangreyite | Ca2Al7(PO4)2(PO3OH)2(OH,F)15 · 8H2O |
Fluorescence of Fluellite
May fluoresce creamy white under SW, MW and LW (Harold Moritz comm., 2022).
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 Fluellite
mindat.org URL:
https://www.mindat.org/min-1565.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Fluellite
Reference List:
Guy, Brian B., Jeffrey, G. A. (1966) The crystal structure of fluellite, Al2PO4F2(OH)·7H2O. American Mineralogist, 51 (11-12) 1579-1592
Guy, Brian B., Jeffrey, G. A., Tassel, R. Van (1967) The crystal structure of fluellite: A correction. American Mineralogist, 52 (9-10) 1576
Čejka, Jiří, Sejkora, Jiří, Macek, Ivo, Frost, Ray L., López, Andrés, Scholz, Ricardo, Xi, Yunfei (2014) A vibrational spectroscopic study of a hydrated hydroxy-phosphate mineral fluellite, Al2(PO4)F2(OH)·7H2O. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 126. 157-163 doi:10.1016/j.saa.2014.01.116
Localities for Fluellite
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.
Argentina | |
| Minerals acquired from Mr. Nelson ... +1 other reference |
| Dina (1993) |
Demartin et al. (1997) | |
Australia | |
| Murray (1973) +1 other reference |
| Mineralogical Record (xxxx) +2 other references |
Francis et al. (self published) | |
| - (1981) |
- (1981) +2 other references | |
| Peter Elliott |
| Francis et al. (self published) |
| Henderson (1981) |
| |
W.D.Birch & D.A.Henry 1993. Phosphate ... | |
| Museum Victoria Mineralogy Collection +1 other reference |
Belgium | |
| Van Tassel (1959) +1 other reference |
Fransolet et al. (1974) +3 other references | |
Brazil | |
| Witzke et al. (2000) |
China | |
| Hercule Shen |
Czech Republic | |
| Černý et al. (Weisser Stein) |
| Petr Pauliš (2000) +1 other reference |
France | |
| 54 (in German) +1 other reference |
| Hatert et al. (2020) |
Germany | |
| Fehr et al. (1985) |
| Palache et al. (1951) +1 other reference |
| Palache et al. (1951) +2 other references |
| Thalheim et al. (2006) |
Italy | |
| Menchetti et al. (1981) +1 other reference |
Kyrgyzstan | |
| Karpenko et al. (2009) |
Morocco | |
| Favreau (2012) |
Russia | |
| Rychagov et al. (2017, November) |
| Gamyanin et al. (2014) |
| Gongalsky et al. (2019) |
Spain | |
| Calvo et al. (2003) +1 other reference |
Sweden | |
| Bjällerud (1989) |
UK (TL) | |
| Rudler (1905) +3 other references |
| Kingsbury (1959) +1 other reference |
USA | |
| Kampf et al. (2013) |
| The Canadian Mineralogist: 42 (3) +1 other reference |
| Mineralogical Record 26:467 |
Nevada Bureau of Mines and Geology ... | |
| Dr. William S. Wise presentation to ... |
| Jensen et al. (2001) +1 other reference |
| - (1977) |
| Peacor et al. (1984) |
| O'Neill (2014) |
| Bullock (1981) |
| Bullock (1981) |
| Petersen et al. (1993) |
| Lovering et al. (1960) |
| Kearns et al. (2000) |
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Richelle, Visé, Liège, Wallonia, Belgium