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Overite

A valid IMA mineral species - grandfathered
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05811680014947157864350.jpg
Overite

Little Green Monster Variscite Mine, Clay Canyon, Fairfield, Sunshine Mining District, Utah County, Utah, USA
06470890014947162625452.jpg
Overite, etc.

Fairfield, Sunshine Mining District, Utah County, Utah, USA
07421110017071449349895.jpg
Overite, etc.

Clay Canyon, Fairfield, Sunshine Mining District, Utah County, Utah, USA
02180770014946653742306.jpg
Overite

Little Green Monster Variscite Mine, Clay Canyon, Fairfield, Sunshine Mining District, Utah County, Utah, USA
06470890014947162625452.jpg
Overite, etc.

Fairfield, Sunshine Mining District, Utah County, Utah, USA
09017400017068426706990.jpg
Overite, etc.

Clay Canyon, Fairfield, Sunshine Mining District, Utah County, Utah, USA
05811680014947157864350.jpg
Overite

Little Green Monster Variscite Mine, Clay Canyon, Fairfield, Sunshine Mining District, Utah County, Utah, USA
06470890014947162625452.jpg
Overite, etc.

Fairfield, Sunshine Mining District, Utah County, Utah, USA
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About OveriteHide

07356080017072536784616.jpg
Edwin Over
Formula:
CaMgAl(PO4)2(OH) · 4H2O
Colour:
Light apple-green to colourless; colourless in transmitted light.
Lustre:
Vitreous
Hardness:
3½ - 4
Specific Gravity:
2.53
Crystal System:
Orthorhombic
Member of:
Overite Group
Name:
After Mr. Edwin J. Over (1903-1963) American mineral collector, Colorado Springs, Colorado, USA, who worked with Arthur Montgomery at the Fairfield locality and who discovered the first material.
Overite Group.

A secondary phosphate mineral found in altered phosphate nodules in sediments and in granitic pegmatites.


Unique IdentifiersHide

Mindat ID:
3048
Long-form identifier:
mindat:1:1:3048:5
GUID
(UUID V4):
12656320-4583-461e-822c-868071832736

IMA Classification of OveriteHide

IMA status:
Approved, 'Grandfathered' (first described prior to 1959)
First published:
1940
Type description reference:
Larsen, Esper S., 3d, (1940) Overite and montgomeryite: two new minerals from Fairfield, Utah. American Mineralogist, 25 (5) 315-326

Classification of OveriteHide

Strunz-mindat (2024):
8.DH.20

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
H : With large and medium-sized cations, (OH, etc.):RO4 < 1:1
Dana 8th ed.:
42.11.1.1

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
11 : (AB)3(XO4)2Zq·xH2O
Hey's CIM Ref.:
19.8.11

19 : Phosphates
8 : Phosphates of Al and other metals

Mineral SymbolsHide

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

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

Physical Properties of OveriteHide

Lustre:
Vitreous
Transparency:
Translucent
Colour:
Light apple-green to colourless; colourless in transmitted light.
Hardness:
3½ - 4 on Mohs scale
Cleavage:
Perfect
On {010}, perfect; on {100}, poor.
Density:
2.53 g/cm3 (Measured)    2.51 g/cm3 (Calculated)

Optical Data of OveriteHide

Type:
Biaxial (-)
RI values:
nα = 1.568 nβ = 1.574 nγ = 1.580
2V:
Measured: 75° , Calculated: 88°
Max Birefringence:
δ = 0.012
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
r > v strong

Chemistry of OveriteHide

Mindat Formula:
CaMgAl(PO4)2(OH) · 4H2O
Elements listed:
Al, Ca, H, Mg, O, P - search for minerals with similar chemistry

Crystallography of OveriteHide

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pbca
Cell Parameters:
a = 14.723(14) Å, b = 18.746(16) Å, c = 7.107(4) Å
Ratio:
a:b:c = 0.785 : 1 : 0.379
Unit Cell V:
1,961.51 ų (Calculated from Unit Cell)
Z:
8
Morphology:
Crystals platy to lathlike, flattened on {010} and elongated along [001]. Forms exhibited include {010}, {100}, {110}, {121}, and {021}. Commonly forms subparallel aggregates; massive.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0000582OveriteMoore P B, Araki T (1977) Overite, segelerite, and jahnsite: a study in combinatorial polymorphism American Mineralogist 62 692-70219770293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
2.832 Å(100)
9.4 Å(80)
5.29 Å(60)
2.889 Å(60)
3.70 Å(50)
1.975 Å(50)
3.42 Å(40)
Comments:
Fairfield, Utah, USA. ICDD 16-157.

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Near-surface Processes
21 : Chemically precipitated carbonate, phosphate, iron formations
22 : Hydration and low-𝑇 subsurface aqueous alteration (see also #23)
Geological Setting:
Complex granitic pegmatite.

Type Occurrence of OveriteHide

Type Locality:
ⓘ Clay Canyon, Fairfield, Sunshine Mining District, Utah County, Utah, USA
General Appearance of Type Material:
Pale green to colorless vitreous crystals in cavities in the variscite nodules.
Place of Conservation of Type Material:
Harvard University, Cambridge, Massachusetts, USA: #95482. U.S. National Museum of Natural History, Washington, D.C., USA: #R7898.
Geological Setting of Type Material:
Altered phosphate nodules in sedimentary rocks.
Associated Minerals at Type Locality:
VarisciteApatite
Reference:
Larsen, E.S. (1940) Overite and montgomeryite: two new minerals from Fairfield, Utah. American Mineralogist: 25: 315-326.
Download:
https://rruff.info/rruff_1.0/uploads/AM25_315.pdf

Other Language Names for OveriteHide

German:Overit
Russian:Оверит
Spanish:Overita

Relationship of Overite to other SpeciesHide

Member of:
Overite Group
Other Members of this group:
Manganosegelerite(Mn2+,Ca)(Mn2+,Fe2+,Mg)Fe3+(PO4)2(OH) · 4H2OOrth. mmm (2/m 2/m 2/m) : Pbca
SegeleriteCa2 Mg2 Fe3+2(PO4)4(OH)2 · 8H2OOrth. mmm (2/m 2/m 2/m) : Pcca
WilhelmvierlingiteCaMnFe3+(PO4)2(OH) · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbca

Common AssociatesHide

Associated Minerals Based on Photo Data:
5 photos of Overite associated with CrandalliteCaAl3(PO4)(PO3OH)(OH)6
3 photos of Overite associated with VarisciteAlPO4 · 2H2O
1 photo of Overite associated with GordoniteMgAl2(PO4)2(OH)2 · 8H2O
1 photo of Overite associated with WhitlockiteCa9Mg(PO4)6(PO3OH)
1 photo of Overite associated with GroatiteNaCaMn2(PO4)[PO3(OH)]2
1 photo of Overite associated with CacoxeniteFe3+24AlO6(PO4)17(OH)12 · 75H2O
1 photo of Overite associated with WarditeNaAl3(PO4)2(OH)4 · 2H2O

Related Minerals - Strunz-mindat GroupingHide

8.DH.FerroberauniteFe2+Fe3+5(PO4)4(OH)5 · 6H2OMon. 2/m : B2/b
8.DH.Rowleyite[Na(NH4,K)9Cl4][V5+,4+2(P,As)O8]6 · n[H2O,Na,NH4,K,Cl]Iso.
8.DH.Ammoniotinsleyite(NH4)Al2(PO4)2(OH) · 2H2OMon. 2/m : P21/m
8.DH.Thebaite-(NH4)(NH4)3Al(C2O4)(PO3OH)2(H2O)Mon. 2/m : P21/b
8.DH.Dendoraite-(NH4)(NH4)2NaAl(C2O4)(PO3OH)2(H2O)2Mon. 2/m
8.DH.Whiteite-(MnMnMn)Mn2+Mn2+Mn2+2Al2(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.Whiteite-(CaMnFe)CaMnFe2Al2(PO4)4(OH)2 · 8H2OMon. 2/m
8.DH.HochleitneriteMn2Ti3(PO4)4O2(H2O)2 · 14H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.DH.RegeriteKFe6(PO4)4(OH)7(H2O)6 · 4H2OMon. 2/m : P21/b
8.DH.05MinyuliteKAl2(PO4)2F · 4H2OOrth. mm2 : Pba2
8.DH.10LeucophosphiteKFe3+2(PO4)2(OH) · 2H2OMon. 2/m : P21/b
8.DH.10Spheniscidite(NH4,K)(Fe3+,Al)2(PO4)2(OH) · 2H2OMon. 2/m
8.DH.10TinsleyiteKAl2(PO4)2(OH) · 2H2OMon.
8.DH.15Jahnsite-(CaMnFe){Ca}{Mn2+}{Fe2+2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(CaMnMg){Ca}{Mn2+}{(Mg,Fe2+)2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(CaMnMn){Ca}{Mn2+}{Mn2+2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15KeckiteCaMn2+(Fe3+Mn2+)Fe3+2(PO4)4(OH)3 · 7H2OMon. 2/m : P2/b
8.DH.15Rittmannite{(Mn2+,Ca)}{Mn2+}{(Fe2+,Mn2+,Mg)2}{(Al,Fe3+)2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Whiteite-(CaFeMg){Ca}{(Fe2+,Mn2+)}{Mg2}{Al2}(PO4)4(OH)2 · 8H2OMon. 2/m : P21/b
8.DH.15Whiteite-(CaMnMg){Ca}{Mn2+}{Mg2}{Al2}(PO4)4(OH)2 · 8H2OMon. 2/m
8.DH.15Whiteite-(MnFeMg){(Mn2+,Ca)}{(Fe2+,Mn2+)}{Mg2}{Al2}(PO4)4(OH)2 · 8H2OMon. 2/m : P21/b
8.DH.15Jahnsite-(MnMnMn){Mn2+}{Mn2+}{Mn2+2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P21/b
8.DH.15Kaluginite(Mn2+,Ca)MgFe3+(PO4)2(OH) · 4H2OOrth.
8.DH.15Jahnsite-(CaFeFe){Ca}{Fe2+}{Fe2+2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon.
8.DH.15Jahnsite-(NaFeMg)NaFe3+Mg2Fe3+2(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(NaMnMg){(Na,Ca)}{(Mn2+,Fe3+)}{(Mg,Fe3+)2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(CaMgMg){Ca}{Mg}{Mg2}{Fe3+2}(PO4)4(OH)2 · 8H2O
8.DH.15Whiteite-(CaMnMn){Ca}{Mn2+}{Mn2}{Al2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Whiteite-(MnMnMg)MnMnMg2Al2(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(MnMnMg)Mn2+Mn2+Mg2Fe3+2(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(CaFeMg)CaFe2+Mg2Fe3+2(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(MnMnFe)Mn2+Mn2+Fe2+2Fe3+2(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Whiteite-(CaMgMg)CaMg3Al2(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(MnMnZn)Mn2+Mn2+Zn2Fe3+2(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(NaMnMn)NaMn2+(Mn2+Fe3+)Σ2Fe3+2(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(CaMnZn)CaMn2+Zn2Fe3+2(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.20Lun'okite(Mn,Ca)(Mg,Fe,Mn)Al(PO4)2OH · 4H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.DH.20Manganosegelerite(Mn2+,Ca)(Mn2+,Fe2+,Mg)Fe3+(PO4)2(OH) · 4H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.DH.20SegeleriteCa2 Mg2 Fe3+2(PO4)4(OH)2 · 8H2OOrth. mmm (2/m 2/m 2/m) : Pcca
8.DH.20WilhelmvierlingiteCaMnFe3+(PO4)2(OH) · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.DH.20JuonniiteCaMgSc(PO4)2(OH) · 4H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.DH.25CalcioferriteCa2Fe3+2(PO4)3(OH) · 7H2OMon. 2/m : B2/b
8.DH.25KingsmountiteCa3MnFeAl4(PO4)6(OH)4 · 12H2OTric. 1 : P1
8.DH.25MontgomeryiteCa4MgAl4(PO4)6(OH)4 · 12H2OMon. 2 : B2
8.DH.25ZodaciteCa4Mn2+Fe3+4(PO4)6(OH)4 · 12H2OMon.
8.DH.25FanfaniiteCa4MnAl4(PO4)6(OH)4 · 12H2OMon. 2/m : B2/b
8.DH.30ArseniosideriteCa2Fe3+3(AsO4)3O2 · 3H2OMon. 2/m : B2/b
8.DH.30KolfaniteCa2Fe3+3O2(AsO4)3 · 2H2OMon.
8.DH.30MitridatiteCa2Fe3+3(PO4)3O2 · 3H2OMon. 2/m : B2/b
8.DH.30PararobertsiteCa2Mn3+3(PO4)3O2 · 3H2OMon. 2/m : P21/b
8.DH.30RobertsiteCa2Mn3+3(PO4)3O2 · 3H2OMon. m : Bb
8.DH.30Sailaufite(Ca,Na,◻)2Mn3+3(AsO4)2(CO3)O2 · 3H2OMon. m : Bm
8.DH.35MantienneiteKMg2Al2Ti(PO4)4(OH)3 · 15H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.DH.35PaulkerriteK(Mg,Mn2+)2(Fe3+,Al,Ti,Mg)2Ti(PO4)4(OH)3 · 15H2OMon. m
8.DH.35Benyacarite(H2O)2Mn2Ti2Fe3+(PO4)4(OF)(H2O)10 · 4H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.DH.35Hydroxylbenyacarite(H2O)2Mn2(Ti2Fe)(PO4)4[O(OH)](H2O)10 · 4H2O Orth. mmm (2/m 2/m 2/m) : Pbca
8.DH.35MacraeiteK(H2O)Mn2(Fe2Ti)(PO4)4[O(OH)](H2O)10 · 4H2OMon. 2/m : P21/b
8.DH.40XanthoxeniteCa4Fe3+2(PO4)4(OH)2 · 3H2OTric. 1 : P1
8.DH.45MahnertiteNaCu3(AsO4)2Cl · 5H2OTet. 4/mmm (4/m 2/m 2/m) : I4/mmm
8.DH.50AndyrobertsiteKCdCu5(AsO4)4(H2AsO4) · 2H2OMon. 2/m : P21/m
8.DH.50CalcioandyrobertsiteKCaCu5(AsO4)4(H2AsO4) · 2H2OMon. 2/m : P21/m
8.DH.55EnglishiteK3Na2Ca10Al15(PO4)21(OH)7 · 26H2OMon. 2/m
8.DH.60BouazzeriteBi6(Mg,Co)11Fe3+14(AsO4)18(OH)4O12 · 86H2OMon. 2/m
8.DH.65GalliskiiteCa4Al2(PO4)2F8 · 5H2OTric. 1 : P1
8.DH.70JoteiteCa2CuAl(AsO4)[AsO3(OH)]2(OH)2 · 5H2OTric. 1 : P1
8.DH.75KampeliteBa6Mg3Sc8(PO4)12(OH)6 · 7H2OOrth. mmm (2/m 2/m 2/m) : Pnma
8.DH.80KapundaiteNaCaFe4(PO4)4(OH)3 · 5H2OTric. 1 : P1
8.DH.85VaniniiteCa2Mn2+3Mn3+2O2(AsO4)4 · 2H2OMon. 2/m : P21/b

Other InformationHide

Notes:
Readily soluble in hot nitric acid.
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 OveriteHide

References for OveriteHide

Localities for OveriteHide

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

Locality ListHide

- 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.
Australia
 
  • Western Australia
    • Meekatharra Shire
      • Milgun Station
Mineralogical Magazine 39 (1974)
Canada
 
  • Manitoba
    • Lac-du-Bonnet area
      • Bernic Lake
153-155. +2 other references
Portugal
 
  • Viseu
    • Mangualde
      • Mangualde (Mesquitela e Cunha Alta)
Canadian Mineralogist 47 et al. (2009)
Russia
 
  • Chelyabinsk Oblast
    • Plastovsky District
      • Svetlyi
Local geolofist S.V.Kolesnichenko data
USA
 
  • Nevada
    • Mineral County
      • Candelaria Mining District
Kampf et al. (2016)
        • Candelaria Silver Mine
Collected by Paul Adams. EDS and XRD ...
  • Utah
    • Utah County
      • Sunshine Mining District
        • Fairfield
Palache et al. (1951) +1 other reference
Rocks & Minerals (1970) +1 other reference
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