Overite
A valid IMA mineral species - grandfathered
This page is currently not sponsored. Click here to sponsor this page.
About Overite
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:
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.
A secondary phosphate mineral found in altered phosphate nodules in sediments and in granitic pegmatites.
Unique Identifiers
Mindat ID:
3048
Long-form identifier:
mindat:1:1:3048:5
IMA Classification of Overite
Approved, 'Grandfathered' (first described prior to 1959)
First published:
1940
Classification of Overite
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
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
H : With large and medium-sized cations, (OH, etc.):RO4 < 1:1
42.11.1.1
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
11 : (AB)3(XO4)2Zq·xH2O
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
11 : (AB)3(XO4)2Zq·xH2O
19.8.11
19 : Phosphates
8 : Phosphates of Al and other metals
19 : Phosphates
8 : Phosphates of Al and other metals
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 |
|---|---|---|
| Ove | 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 Overite
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.
On {010}, perfect; on {100}, poor.
Density:
2.53 g/cm3 (Measured) 2.51 g/cm3 (Calculated)
Optical Data of Overite
Type:
Biaxial (-)
RI values:
nα = 1.568 nβ = 1.574 nγ = 1.58
2V:
Measured: 75° , Calculated: 88°
Max. Birefringence:
δ = 0.012
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
Surface Relief:
Moderate
Dispersion:
r > v strong
Chemistry of Overite
Mindat Formula:
CaMgAl(PO4)2(OH) · 4H2O
Element Weights:
Crystallography of Overite
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 Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
Black Background | White Background
Perspective On | Perspective Off
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
Console Off | On | Grey | Yellow
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) |
|---|---|---|---|---|---|---|---|
| 0000582 | Overite | Moore P B, Araki T (1977) Overite, segelerite, and jahnsite: a study in combinatorial polymorphism American Mineralogist 62 692-702 |  | 1977 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 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 Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 21 : Chemically precipitated carbonate, phosphate, iron formations | |
| 22 : Hydration and low-? subsurface aqueous alteration (see also #23) |
Geological Setting:
Complex granitic pegmatite.
Type Occurrence of Overite
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:
Other Language Names for Overite
Relationship of Overite to other Species
Member of:
Other Members of Overite Group:
| Manganosegelerite | (Mn2+,Ca)(Mn2+,Fe2+,Mg)Fe3+(PO4)2(OH) · 4H2O | Orth. mmm (2/m 2/m 2/m) : Pbca |
| Segelerite | Ca2 Mg2 Fe3+2(PO4)4(OH)2 · 8H2O | Orth. mmm (2/m 2/m 2/m) : Pcca |
| Wilhelmvierlingite | CaMnFe3+(PO4)2(OH) · 2H2O | Orth. mmm (2/m 2/m 2/m) : Pbca |
Common Associates
Associated Minerals Based on Photo Data:
| 5 photos of Overite associated with Crandallite | CaAl3(PO4)(PO3OH)(OH)6 |
| 3 photos of Overite associated with Variscite | AlPO4 · 2H2O |
| 1 photo of Overite associated with Cacoxenite | Fe3+24AlO6(PO4)17(OH)12 · 75H2O |
| 1 photo of Overite associated with Whitlockite | Ca9Mg(PO4)6(PO3OH) |
| 1 photo of Overite associated with Groatite | NaCaMn2(PO4)[PO3(OH)]2 |
| 1 photo of Overite associated with Gordonite | MgAl2(PO4)2(OH)2 · 8H2O |
| 1 photo of Overite associated with Wardite | NaAl3(PO4)2(OH)4 · 2H2O |
Related Minerals - Strunz-mindat Grouping
| 8.DH. | Thebaite-(NH4) | (NH4)3Al(C2O4)(PO3OH)2(H2O) |
| 8.DH. | Whiteite-(MnMnMn) | Mn2+Mn2+Mn2+2Al2(PO4)4(OH)2 · 8H2O |
| 8.DH. | Ferroberaunite | Fe2+Fe3+5(PO4)4(OH)5 · 6H2O |
| 8.DH. | Regerite | KFe6(PO4)4(OH)7(H2O)6 · 4H2O |
| 8.DH. | Ammoniotinsleyite | (NH4)Al2(PO4)2(OH) · 2H2O |
| 8.DH. | Dendoraite-(NH4) | (NH4)2NaAl(C2O4)(PO3OH)2(H2O)2 |
| 8.DH. | Rowleyite | [Na(NH4,K)9Cl4][V5+,4+2(P,As)O8]6 · n[H2O,Na,NH4,K,Cl] |
| 8.DH. | Hochleitnerite | Mn2Ti3(PO4)4O2(H2O)2 · 14H2O |
| 8.DH. | Whiteite-(CaMnFe) | CaMnFe2Al2(PO4)4(OH)2 · 8H2O |
| 8.DH.05 | Minyulite | KAl2(PO4)2F · 4H2O |
| 8.DH.10 | Leucophosphite | KFe3+2(PO4)2(OH) · 2H2O |
| 8.DH.10 | Tinsleyite | KAl2(PO4)2(OH) · 2H2O |
| 8.DH.10 | Spheniscidite | (NH4,K)(Fe3+,Al)2(PO4)2(OH) · 2H2O |
| 8.DH.15 | Jahnsite-(CaMnFe) | {Ca}{Mn2+}{Fe2+2}{Fe3+2}(PO4)4(OH)2 · 8H2O |
| 8.DH.15 | Jahnsite-(NaMnMn) | {Na}{Mn2+}{(Mn2+,Fe3+)2}{Fe3+2}(PO4)4(OH)2 · 8H2O |
| 8.DH.15 | Jahnsite-(CaMnMg) | {Ca}{Mn2+}{(Mg,Fe2+)2}{Fe3+2}(PO4)4(OH)2 · 8H2O |
| 8.DH.15 | Jahnsite-(CaMnMn) | {Ca}{Mn2+}{Mn2+2}{Fe3+2}(PO4)4(OH)2 · 8H2O |
| 8.DH.15 | Whiteite-(MnMnMg) | MnMnMg2Al2(PO4)4(OH)2 · 8H2O |
| 8.DH.15 | Jahnsite-(CaMnZn) | {Ca}{Mn2+}{Zn2}{Fe3+2}(PO4)4(OH)2 · 8H2O |
| 8.DH.15 | Jahnsite-(MnMnMg) | {Mn2+}{Mn2+}{Mg2}{Fe3+2}(PO4)4(OH)2 · 8H2O |
| 8.DH.15 | Jahnsite-(MnMnFe) | {Mn2+}{Mn2+}{Fe2+2}{Fe3+2}(PO4)4(OH)2 · 8H2O |
| 8.DH.15 | Jahnsite-(CaFeFe) | {Ca}{Fe2+}{Fe2+2}{Fe3+2}(PO4)4(OH)2 · 8H2O |
| 8.DH.15 | Rittmannite | {(Mn2+,Ca)}{Mn2+}{(Fe2+,Mn2+,Mg)2}{(Al,Fe3+)2}(PO4)4(OH)2 · 8H2O |
| 8.DH.15 | Keckite | CaMn2+(Fe3+Mn2+)Fe3+2(PO4)4(OH)3 · 7H2O |
| 8.DH.15 | Jahnsite-(NaMnMg) | {(Na,Ca)}{(Mn2+,Fe3+)}{(Mg,Fe3+)2}{Fe3+2}(PO4)4(OH)2 · 8H2O |
| 8.DH.15 | Jahnsite-(CaMgMg) | {Ca}{Mg}{Mg2}{Fe3+2}(PO4)4(OH)2 · 8H2O |
| 8.DH.15 | Jahnsite-(MnMnZn) | {Mn2+}{Mn2+}{Zn2}{Fe3+2}(PO4)4(OH)2 · 8H2O |
| 8.DH.15 | Whiteite-(CaMgMg) | CaMg3Al2(PO4)4(OH)2 · 8H2O |
| 8.DH.15 | Whiteite-(CaFeMg) | {Ca}{(Fe2+,Mn2+)}{Mg2}{Al2}(PO4)4(OH)2 · 8H2O |
| 8.DH.15 | Whiteite-(CaMnMg) | {Ca}{Mn2+}{Mg2}{Al2}(PO4)4(OH)2 · 8H2O |
| 8.DH.15 | Whiteite-(MnFeMg) | {(Mn2+,Ca)}{(Fe2+,Mn2+)}{Mg2}{Al2}(PO4)4(OH)2 · 8H2O |
| 8.DH.15 | Jahnsite-(MnMnMn) | {Mn2+}{Mn2+}{Mn2+2}{Fe3+2}(PO4)4(OH)2 · 8H2O |
| 8.DH.15 | Kaluginite | (Mn2+,Ca)MgFe3+(PO4)2(OH) · 4H2O |
| 8.DH.15 | Jahnsite-(CaFeMg) | {Ca}{Fe2+}{Mg2}{Fe3+2}(PO4)4(OH)2 · 8H2O |
| 8.DH.15 | Whiteite-(CaMnMn) | {Ca}{Mn2+}{Mn2}{Al2}(PO4)4(OH)2 · 8H2O |
| 8.DH.15 | Jahnsite-(NaFeMg) | {Na}{Fe3+}{Mg2}{Fe3+2}(PO4)4(OH)2 · 8H2O |
| 8.DH.20 | Segelerite | Ca2 Mg2 Fe3+2(PO4)4(OH)2 · 8H2O |
| 8.DH.20 | Lun'okite | (Mn,Ca)(Mg,Fe,Mn)Al(PO4)2OH · 4H2O |
| 8.DH.20 | Manganosegelerite | (Mn2+,Ca)(Mn2+,Fe2+,Mg)Fe3+(PO4)2(OH) · 4H2O |
| 8.DH.20 | Wilhelmvierlingite | CaMnFe3+(PO4)2(OH) · 2H2O |
| 8.DH.20 | Juonniite | CaMgSc(PO4)2(OH) · 4H2O |
| 8.DH.25 | Calcioferrite | Ca2Fe3+2(PO4)3(OH) · 7H2O |
| 8.DH.25 | Zodacite | Ca4Mn2+Fe3+4(PO4)6(OH)4 · 12H2O |
| 8.DH.25 | Fanfaniite | Ca4MnAl4(PO4)6(OH)4 · 12H2O |
| 8.DH.25 | Kingsmountite | Ca3MnFeAl4(PO4)6(OH)4 · 12H2O |
| 8.DH.25 | Montgomeryite | Ca4MgAl4(PO4)6(OH)4 · 12H2O |
| 8.DH.30 | Pararobertsite | Ca2Mn3+3(PO4)3O2 · 3H2O |
| 8.DH.30 | Robertsite | Ca2Mn3+3(PO4)3O2 · 3H2O |
| 8.DH.30 | Arseniosiderite | Ca2Fe3+3(AsO4)3O2 · 3H2O |
| 8.DH.30 | Sailaufite | (Ca,Na,◻)2Mn3+3(AsO4)2(CO3)O2 · 3H2O |
| 8.DH.30 | Mitridatite | Ca2Fe3+3(PO4)3O2 · 3H2O |
| 8.DH.30 | Kolfanite | Ca2Fe3+3O2(AsO4)3 · 2H2O |
| 8.DH.35 | Mantienneite | KMg2Al2Ti(PO4)4(OH)3 · 15H2O |
| 8.DH.35 | Sperlingite | (H2O)K(Mn2+Fe3+)(Al2Ti)(PO4)4[O(OH)] [(H2O)9(OH)] · 4H2O |
| 8.DH.35 | Paulkerrite | K(Mg,Mn2+)2(Fe3+,Al,Ti,Mg)2Ti(PO4)4(OH)3 · 15H2O |
| 8.DH.35 | Hydroxylbenyacarite | (H2O)2Mn2(Ti2Fe)(PO4)4[O(OH)](H2O)10 · 4H2O |
| 8.DH.35 | Macraeite | K(H2O)Mn2(Fe2Ti)(PO4)4[O(OH)](H2O)10 · 4H2O |
| 8.DH.35 | Benyacarite | (H2O)2Mn2Ti2Fe3+(PO4)4(OF)(H2O)10 · 4H2O |
| 8.DH.35 | Fluormacraeite | [(H2O)K]Mn2(Fe2Ti)(PO4)4(OF)(H2O)10 · 4H2O |
| 8.DH.40 | Xanthoxenite | Ca4Fe3+2(PO4)4(OH)2 · 3H2O |
| 8.DH.45 | Mahnertite | NaCu3(AsO4)2Cl · 5H2O |
| 8.DH.50 | Andyrobertsite | KCdCu5(AsO4)4(H2AsO4) · 2H2O |
| 8.DH.50 | Calcioandyrobertsite | KCaCu5(AsO4)4(H2AsO4) · 2H2O |
| 8.DH.55 | Englishite | K3Na2Ca10Al15(PO4)21(OH)7 · 26H2O |
| 8.DH.60 | Bouazzerite | Bi6(Mg,Co)11Fe3+14(AsO4)18(OH)4O12 · 86H2O |
| 8.DH.65 | Galliskiite | Ca4Al2(PO4)2F8 · 5H2O |
| 8.DH.70 | Joteite | Ca2CuAl(AsO4)[AsO3(OH)]2(OH)2 · 5H2O |
| 8.DH.75 | Kampelite | Ba6Mg3Sc8(PO4)12(OH)6 · 7H2O |
| 8.DH.80 | Kapundaite | NaCaFe4(PO4)4(OH)3 · 5H2O |
| 8.DH.85 | Vaniniite | Ca2Mn2+3Mn3+2O2(AsO4)4 · 2H2O |
Other Information
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 Overite
mindat.org URL:
https://www.mindat.org/min-3048.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
References for Overite
Reference List:
Larsen, Esper S., Shannon, Earl V. (1930) The minerals of the phosphate nodules from near Fairfield, Utah. American Mineralogist, 15 (8) 307-337 (as number 8)
Larsen, Esper S., 3d, (1940) Overite and montgomeryite: two new minerals from Fairfield, Utah. American Mineralogist, 25 (5) 315-326
Moore, Paul Brian, Ito, J. (1974) I. Jahnsite, segelerite, and robertsite, three new transition metal phosphate species. II. Redefinition of overite, an isotype of segelerite. III. Isotypy of robertsite, mitridatite, and arseniosiderite. American Mineralogist, 59 (1-2) 48-59
Localities for Overite
symbol to view information about a locality.
The 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).
All localities listed without proper references should be considered as questionable.
Australia | |
| Mineralogical Magazine 39 (1974) |
Canada | |
| 153-155. +2 other references |
Portugal | |
| Canadian Mineralogist 47 et al. (2009) |
Russia | |
| Local geolofist S.V.Kolesnichenko data |
USA | |
| Kampf et al. (2016) |
| Collected by Paul Adams. EDS and XRD ... |
| Palache et al. (1951) +1 other reference |
| Rocks & Minerals (1970) +1 other reference |
Quick NavTopAbout OveriteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence Other LanguagesRelationshipsCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Little Green Monster Variscite Mine, Clay Canyon, Fairfield, Sunshine Mining District, Utah County, Utah, USA