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⇱ Lefontite: Mineral information, data and localities.

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Lefontite

A valid IMA mineral species - pending publication
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About LefontiteHide

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Formula:
Fe2Al2Be(PO4)2(OH)6
Crystal System:
Orthorhombic
Related to childrenite and eosphorite.


Unique IdentifiersHide

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Mindat ID:
46518
Long-form identifier:
mindat:1:1:46518:8

Similar NamesHide

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LecontiteA valid IMA mineral species - grandfathered(NH4,K)NaSO4 · 2H2O
LevantiteA valid IMA mineral speciesKCa3Al2(SiO4)(Si2O7)(PO4)

IMA Classification of LefontiteHide

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Approved, Pending publication
Approval year:
2014

Classification of LefontiteHide

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8.DD.20

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
D : With only medium-sized cations, (OH, etc.):RO4= 2:1

Mineral SymbolsHide

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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference for Standard
LefIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Chemistry of LefontiteHide

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Mindat Formula:
Fe2Al2Be(PO4)2(OH)6
Element Weights:
Element% weight
O48.000 %
Fe23.934 %
P13.275 %
Al11.564 %
Be1.931 %
H1.296 %

Calculated from ideal end-member formula.

Crystallography of LefontiteHide

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Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Space Group:
Cmca
Setting:
Cmca
Cell Parameters:
a = 7.0087(3) Å, b = 10.5082(4) Å, c = 13.1179(5) Å
Ratio:
a:b:c = 0.667 : 1 : 1.248
Unit Cell V:
966.12 ų (Calculated from Unit Cell)

X-Ray Powder DiffractionHide

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Powder Diffraction Data:
d-spacingIntensity
6.600 Å(97)
5.245 Å(100)
4.872 Å(42)
4.360 Å(73)
4.105 Å(61)
3.369 Å(54)
2.622 Å(38)
2.357 Å(36)
Comments:
From Type Description.

Geological EnvironmentHide

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Paragenetic Mode(s):

Type Occurrence of LefontiteHide

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Place of Conservation of Type Material:
Cotype material is deposited in the collections of the Mineral Museum of the University of Arizona, Tucson, Arizona, USA, catalogue number 19802, and the RRUFF Project, deposition number R140428

Synonyms of LefontiteHide

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Other Language Names for LefontiteHide

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Dutch:Lefontiet
German:Lefontit

Common AssociatesHide

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Associated Minerals Based on Photo Data:
3 photos of Lefontite associated with Gormanite(Fe2+,Mg)3(Al,Fe3+)4(PO4)4(OH)6 · 2H2O
1 photo of Lefontite associated with RoscheriteCa2Mn2+5Be4(PO4)6(OH)4 · 6H2O

Related Minerals - Strunz-mindat GroupingHide

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8.DD.Penberthycroftite[Al6(AsO4)3(OH)9(H2O)5] · 8H2OMon. 2/m : P21/b
8.DD.Bettertonite[Al6(AsO4)3(OH)9(H2O)5] · 11H2OMon. 2/m : P21/b
8.DD.VargiteMnCu2Mn2(AsO4)2(OH)4(H2O)4Mon. 2/m : P21/b
8.DD.GaleaclolusiteAl6(AsO4)3(OH)9(H2O)4 · 8H2OOrth. mmm(2/m2/m2/m) : Pnma
8.DD.05LuetheiteCu2Al2(AsO4)2(OH)4Mon. 2/m : P21/m
8.DD.05ChenevixiteCu2Fe3+2(AsO4)2(OH)4Mon. 2/m : P21/m
8.DD.10AkrochorditeMnMn2Mn2(AsO4)2(OH)4(H2O)4Mon. 2/m : P21/b
8.DD.10GuanacoiteMgCu2Mg2(AsO4)2(OH)4(H2O)4Mon. 2/m : P21/b
8.DD.15'UM1981-32-PO:FeH'Fe2+Fe3+6(PO4)4-x[PO3(OH)]x(OH)8 · 4H2O
8.DD.15AfmiteAl3(OH)4(H2O)3(PO4)(PO3OH) · H2OTric. 1 : P1
8.DD.15Aheylite(Fe2+,Zn)Al6(PO4)4(OH)8 · 4H2OTric. 1 : P1
8.DD.15'Coeruleolactite'Tric. 1 : P1
8.DD.15FaustiteZnAl6(PO4)4(OH)8 · 4H2OTric. 1 : P1
8.DD.15PlaneriteAl6(PO4)2(PO3OH)2(OH)8 · 4H2OTric. 1 : P1
8.DD.15ChalcosideriteCuFe3+6(PO4)4(OH)8 · 4H2OTric. 1 : P1
8.DD.15TurquoiseCuAl6(PO4)4(OH)8 · 4H2OTric. 1 : P1
8.DD.20EosphoriteMn2+Al(PO4)(OH)2 · H2OOrth. mmm(2/m2/m2/m) : Cmca
8.DD.20Ernstite(Mn2+,Fe3+)Al(PO4)(OH,O)2 · H2OMon.
8.DD.20ChildreniteFe2+Al(PO4)(OH)2 · H2OOrth. mm2 : Ccc2
8.DD.25KobokoboiteAl6(PO4)4(OH)6 · 11H2O Tric.
8.DD.30SmamiteCa2Sb(OH)4[H(AsO4)2] · 6H2OTric. 1 : P1
8.DD.35'Gutsevichite'Al3(PO4)2(OH)3 · 8H2OIso.
8.DD.40'Laubmannite (of Moore)'(Fe3+,Fe2+,M)8+x(OH,H2O)9(H2O)2(PO4)5, M = Fe3+, Cu2+ or other metal cation, x ~ 0.1.Orth. mmm(2/m2/m2/m) : Pbcm

Other InformationHide

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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 LefontiteHide

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mindat.org URL:
https://www.mindat.org/min-46518.html
Please feel free to link to this page.

References for LefontiteHide

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Localities for LefontiteHide

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Showing 2 localities.

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the 👁 Image
symbol to view information about a locality. The 👁 Image
symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

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👁 Image
- This locality has map coordinates listed. 👁 Image
- This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. 👁 Image
- Good crystals or important locality for species. 👁 Image
- 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.
Brazil (TL)
  • Minas Gerais
    • Divino das Laranjeiras
      • Linópolis
Williams et al. (2015) +1 other reference
USA
  • New Hampshire
    • Grafton County
      • Groton
RRUFF specimen with natropalermoite and ... +1 other reference
Quick NavTopAbout LefontiteUnique IdentifiersSimilar NamesIMA Classification Classification Mineral SymbolsChemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
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To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
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