Davidite-(La)
A valid IMA mineral species - grandfathered
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About Davidite-(La)
Tannat William Edgeworth David
Formula:
La(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38
Colour:
Black
Lustre:
Vitreous, Sub-Vitreous, Greasy
Hardness:
6
Specific Gravity:
4.33 - 4.48
Crystal System:
Trigonal
Member of:
Name:
Named in 1906 by Douglas Mawson in honor of Professor Tannat William Edegeworth David [January 28, 1858 St. Fagans (near Cardiff), Glamorganshire, Wales, United Kingdom - August 28, 1934 Sydney, New South Wales, Australia], studied in Cardiff and at the Royal School of Mines, before accepting a position as assistant geological surveyor in New South Wales, Australia. His early work involved studying the tin mining in the New England District and later was assigned to study the Hunter Valley Coal Fields where he discovered the important Greta Coal Seam. In 1891, David was appointed Professor of Geology at the University of Sydney. In 1896, David participated in or actually led expeditions to study the formation on atolls on Funafuti with William Sollas, George Sweet, William George Woolnough, Alfred Edmund Finckh, and others. David also conducted studies of glaciation, including pre-Cambrian glaciation. David discovered what he believed were the first known pre-Cambrian fossils. David was on the first Antarctic Expedition with Ernest Shackleton and led the first ascent of Mount Erebus and to discover the South Magnetic Pole. During World War I, David served with high distinction as well as valor, employing his skills to tunneling, trenching, and fortifications. David authored the Geological Map of the Commonwealth and the accompanying Explanatory Notes, but did not live to complete Geology of the Commonwealth of Australia. He was honored with a state funeral. David earned many of the highest honors established by Australia and the British Empire. Among many noteworthy achievements was his organization of scientific societies. Additionally, many geographic names are assigned in his honor. The suffix La was added to the original name to indicate its dominant REE.
The La analogue of davidite-(Ce). Unique combination of elements not including the hypothetical 'davidite-(Y)').
Unique Identifiers
Mindat ID:
1234
Long-form identifier:
mindat:1:1:1234:4
Similar Names
| Davidite | A synonym | |
| Davidite-(Ce) | A valid IMA mineral species | Ce(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38 |
| Davidite-(Y) | (La,Ce,Na,Ca,Pb)(Y,Fe2+,◻)(Fe2+,Mn2+)2(Ti,Fe3+,Nb,Zr)18O38 (hypothetical) | |
| Davisite | A valid IMA mineral species | CaScAlSiO6 |
| Devadite | A synonym of 'β-Vredenburgite' | |
| Devitoite | A valid IMA mineral species | Ba4Ba2Fe72+Fe23+[Si4O12]2[PO4]2[CO3]O2(OH)4◻2 |
IMA Classification of Davidite-(La)
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
La3+(Y,U4+)Fe3+2(Ti4+,Fe3+,Cr3+,V5+)18(O,OH,F)38
First published:
1906
Classification of Davidite-(La)
4.CC.40
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
C : Metal: Oxygen = 2: 3,3: 5, and similar
C : With large and medium-sized cations
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
C : Metal: Oxygen = 2: 3,3: 5, and similar
C : With large and medium-sized cations
8.5.1.5
8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
5 : AB21O38
8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
5 : AB21O38
7.16.21
7 : Oxides and Hydroxides
16 : Oxides of U
7 : Oxides and Hydroxides
16 : Oxides 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 for Standard |
|---|---|---|
| Dvd-La | 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 Davidite-(La)
Vitreous, Sub-Vitreous, Greasy
Transparency:
Opaque
Colour:
Black
Hardness:
6 on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Conchoidal, Sub-Conchoidal
Density:
4.33 - 4.48 g/cm3 (Measured) 4.49 g/cm3 (Calculated)
Chemistry of Davidite-(La)
Mindat Formula:
La(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38
Element Weights:
Crystallography of Davidite-(La)
Crystal System:
Trigonal
Class (H-M):
3 - Rhombohedral
Space Group:
R3
Cell Parameters:
a = 10.32 Å, c = 20.85 Å
Ratio:
a:c = 1 : 2.02
Unit Cell V:
1,923.07 ų (Calculated from Unit Cell)
Z:
3
Crystal Structure
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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) |
|---|---|---|---|---|---|---|---|
| 0000749 | Davidite-(La) | Gatehouse B M, Grey I E, Kelly P R (1979) The crystal structure of davidite American Mineralogist 64 1010-1017 |  | 1979 | Pandora Prospect, Quijotoa Mts., Pima County, Arizona, USA | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.42 Å | (72) |
| 3.065 Å | (50) |
| 3.000 Å | (40) |
| 2.895 Å | (100) |
| 2.850 Å | (60) |
| 2.480 Å | (38) |
| 2.429 Å | (25) |
| 2.248 Å | (50) |
| 2.139 Å | (40) |
| 1.919 Å | (25) |
| 1.803 Å | (38) |
Comments:
Pabst 1961.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 35 : Ultra-alkali and agpaitic igneous rocks |
Type Occurrence of Davidite-(La)
Place of Conservation of Type Material:
Musée Géologique Cantonal, Lausanne, Switzerland, number MGL 90756 (type).
Synonyms of Davidite-(La)
Davidite (in part)
Other Language Names for Davidite-(La)
Relationship of Davidite-(La) to other Species
Member of:
Other Members of Crichtonite Group:
| Almeidaite | PbZn2(Mn,Y)(Ti,Fe3+)18O37(OH,O) | Trig. 3 : R3 |
| Botuobinskite | SrFe2+Mg2(Cr3+6Ti4+12)[O36(OH)2] | Trig. 3 : R3 |
| Cleusonite | (Pb,Sr)(U4+,U6+)(Fe2+,Zn)2(Ti,Fe2+,Fe3+)18(O,OH)38 | Trig. 3 : R3 |
| Crichtonite | Sr(Mn,Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH)38 | Trig. 3 : R3 |
| Davidite-(Ce) | Ce(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38 | Trig. 3 : R3 |
| 'Davidite-(Y)' | (La,Ce,Na,Ca,Pb)(Y,Fe2+,◻)(Fe2+,Mn2+)2(Ti,Fe3+,Nb,Zr)18O38 (hypothetical) | Trig. |
| Dessauite-(Y) | (Sr,Pb)(Y,U)(Ti,Fe3+)20O38 | Trig. 3 : R3 |
| Gramaccioliite-(Y) | (Pb,Sr)(Y,Mn)Fe3+2(Ti,Fe3+)18O38 | Trig. 3 : R3 |
| Haitaite-(La) | LaU4+Fe3+2(Ti13Fe2+4Fe3+)O38 | Trig. 3 : R3 |
| Landauite | NaMnZn2(Ti,Fe)6Ti12O38 | Trig. 3 : R3 |
| Lindsleyite | (Ba,Sr)(Zr,Ca)(Fe,Mg)2(Ti,Cr,Fe)18O38 | Trig. |
| Loveringite | (Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38 | Trig. 3 : R3 |
| Mapiquiroite | (Sr,Pb)(U,Y)Fe2(Ti,Fe3+,Cr3+)18O38 | Trig. 3 : R3 |
| Mathiasite | (Mg,Cr,Fe,Ca,K)2(Ti,Zr,Cr,Fe)5O12 | Trig. 3 : R3 |
| Mianningite | (◻,Pb,Ce,Na)(U4+,Mn,U6+)Fe3+2 (Ti,Fe3+)18O38 | Trig. 3 : R3 |
| Mirnyite | SrZr4+Mg2(Cr3+6Ti4+12)O38 | Trig. 3 : R3 |
| Paseroite | PbMn2+(Mn2+,Fe3+)2(V5+,Ti,◻)18O38 | Trig. 3 : R3 |
| Saranovskite | SrCaFe2+2(Cr4Ti2)Ti12O38 | Trig. 3 : R3 |
| Senaite | Pb(Mn,Y,U)(Fe,Zn)2(Ti,Fe,Cr,V)18(O,OH)38 | Trig. 3 : R3 |
| 'UM1987-03-O:FePbTiU' | ~(U,Pb)(Ti,Fe3+,Fe2+,Mn)21O38 | Trig. 3 : R3 |
| 'UM2003-08-O:AlCaFeREEScTiV' | (Ca,Ce)Sc(Ti,V,Fe,Al)20O38 | |
| 'UM2006-05-O:CaFeKMnNaREESrTiZr' | (Sr,Na,K,REE)(Ca,Zr,Mn)(Ti,Fe)18Fe2O38 | |
| 'UM2006-06-O:CaFeKMnNaREESrTiZr' | (Sr,Na,K,REE)(Zr,Ca,Mn)(Ti,Fe)18Fe2O38 | |
| 'UM2006-07-O:CaFeKMnNaREESrTiZr' | (Na,Sr,K,REE)(Ca,Zr,Mn)(Ti,Fe)18Fe2O38 | |
| 'UM2006-08-O:CaFeKMnNaREESrTiZr' | (Na,Sr,K,REE)(Zr,Ca,Mn)(Ti,Fe)18Fe2O38 | |
| 'UM2006-09-O:CaFeMnREESrTiZr' | (Ce,Sr,REE)(Ca,Mn,Zr)Fe2(Ti,Fe)18O38 | |
| 'Unnamed (HBU UK-4)' | NaFe2+Zn2(Ti,Fe3+,Nb)6Ti12O38 | Trig. 3 : R3 |
Common Associates
Associations Based on Photo Data:
| 11 photos of Davidite-(La) associated with Carnotite | K2(UO2)2(VO4)2 · 3H2O |
| 7 photos of Davidite-(La) associated with Quartz | SiO2 |
| 6 photos of Davidite-(La) associated with Albite | Na(AlSi3O8) |
| 2 photos of Davidite-(La) associated with Microcline | K(AlSi3O8) |
| 1 photo of Davidite-(La) associated with Loveringite | (Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38 |
| 1 photo of Davidite-(La) associated with Francevillite | Ba(UO2)2(VO4)2 · 5H2O |
| 1 photo of Davidite-(La) associated with Aegirine-augite | (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6 |
Related Minerals - Strunz-mindat Grouping
| 4.CC. | Xuite | Ca3Fe3+2[(AlO3(OH)]3 |
| 4.CC. | Yttriaite-(Y) | Y2O3 |
| 4.CC. | Allendeite | Sc4Zr3O12 |
| 4.CC. | Chlorkyuygenite | Ca12Al14O32[(H2O)4Cl2] |
| 4.CC. | Oboniobite | Mg4Nb2O9 |
| 4.CC. | Botuobinskite | SrFe2+Mg2(Cr3+6Ti4+12)[O36(OH)2] |
| 4.CC. | Mirnyite | SrZr4+Mg2(Cr3+6Ti4+12)O38 |
| 4.CC. | Haitaite-(La) | LaU4+Fe3+2(Ti13Fe2+4Fe3+)O38 |
| 4.CC. | Shagamite | KFe11O17 |
| 4.CC. | Bitikleite | Ca3(Sb5+Sn4+)[AlO4]3 |
| 4.CC. | Anzaite-(Ce) | Ce3+ 4Fe2+Ti6O18 (OH)2 |
| 4.CC. | Heamanite-(Ce) | (K0.5Ce0.5)TiO3 |
| 4.CC. | Priscillagrewite-(Y) | (Ca2Y)Zr2(AlO4)3 |
| 4.CC. | Strandite | Pb3Mn3+4Mn4+3O15 |
| 4.CC. | Saranovskite | SrCaFe2+2(Cr4Ti2)Ti12O38 |
| 4.CC.05 | Chrombismite | Bi3+16Cr6+O27 |
| 4.CC.10 | Freudenbergite | Na2(Ti,Fe)8O16 |
| 4.CC.10 | Fluormayenite | Ca12Al14O32F2 |
| 4.CC.10 | Fluorkyuygenite | Ca12Al14O32[(H2O)4F2] |
| 4.CC.15 | Grossite | CaAl4O7 |
| 4.CC.17 | Goldschmidtite | KNbO3 |
| 4.CC.20 | 'Unnamed (HBU UK-4)' | NaFe2+Zn2(Ti,Fe3+,Nb)6Ti12O38 |
| 4.CC.20 | Chlormayenite | Ca12Al14O32[◻4Cl2] |
| 4.CC.20 | Paseroite | PbMn2+(Mn2+,Fe3+)2(V5+,Ti,◻)18O38 |
| 4.CC.20 | Mianningite | (◻,Pb,Ce,Na)(U4+,Mn,U6+)Fe3+2 (Ti,Fe3+)18O38 |
| 4.CC.20 | 'UM1987-03-O:FePbTiU' | ~(U,Pb)(Ti,Fe3+,Fe2+,Mn)21O38 |
| 4.CC.22 | Gorerite | CaAlFe3+11O19 |
| 4.CC.22 | Kahlenbergite | KAl11O17 |
| 4.CC.25 | Hopmannite | Ba2(Ti5Fe)O13 |
| 4.CC.25 | Nixonite | Na2Ti6O13 |
| 4.CC.25 | Yafsoanite | Ca3Te6+2(ZnO4)3 |
| 4.CC.30 | Latrappite | Ca2NbFe3+O6 |
| 4.CC.30 | Natroniobite | NaNbO3 |
| 4.CC.30 | Perovskite | CaTiO3 |
| 4.CC.30 | Lueshite | NaNbO3 |
| 4.CC.30 | Bariolakargiite | BaZrO3 |
| 4.CC.30 | Barioperovskite | BaTiO3 |
| 4.CC.30 | Megawite | CaSnO3 |
| 4.CC.30 | Lakargiite | Ca(Zr,Sn,Ti)O3 |
| 4.CC.32 | Usturite | Ca3(Sb5+Zr)[Fe3+O4]3 |
| 4.CC.32 | Elbrusite | Ca3(U6+0.5Zr1.5)[Fe3+O4]3 |
| 4.CC.32 | Monteneveite | Ca3Sb5+2(Fe3+2Fe2+)O12 |
| 4.CC.32 | Dzhuluite | Ca3(Sb5+Sn4+)[Fe3+O4]3 |
| 4.CC.35 | Tausonite | SrTiO3 |
| 4.CC.35 | Loparite | (Na,REE)2Ti2O6 |
| 4.CC.35 | Panguite | (Ti,Al,Sc,Mg,Zr,Ca)1.8O3 |
| 4.CC.35 | Isolueshite | (Na,La)NbO3 |
| 4.CC.35 | Macedonite | PbTiO3 |
| 4.CC.37 | Pauloabibite | NaNbO3 |
| 4.CC.40 | Landauite | NaMnZn2(Ti,Fe)6Ti12O38 |
| 4.CC.40 | Mathiasite | (Mg,Cr,Fe,Ca,K)2(Ti,Zr,Cr,Fe)5O12 |
| 4.CC.40 | Senaite | Pb(Mn,Y,U)(Fe,Zn)2(Ti,Fe,Cr,V)18(O,OH)38 |
| 4.CC.40 | Gramaccioliite-(Y) | (Pb,Sr)(Y,Mn)Fe3+2(Ti,Fe3+)18O38 |
| 4.CC.40 | Lindsleyite | (Ba,Sr)(Zr,Ca)(Fe,Mg)2(Ti,Cr,Fe)18O38 |
| 4.CC.40 | Crichtonite | Sr(Mn,Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH)38 |
| 4.CC.40 | Loveringite | (Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38 |
| 4.CC.40 | Cleusonite | (Pb,Sr)(U4+,U6+)(Fe2+,Zn)2(Ti,Fe2+,Fe3+)18(O,OH)38 |
| 4.CC.40 | Davidite-(Ce) | Ce(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38 |
| 4.CC.40 | 'Davidite-(Y)' | (La,Ce,Na,Ca,Pb)(Y,Fe2+,◻)(Fe2+,Mn2+)2(Ti,Fe3+,Nb,Zr)18O38 (hypothetical) |
| 4.CC.40 | 'Uhligite' | Ca3(Ti,Al,Zr)9O20 ? |
| 4.CC.40 | Dessauite-(Y) | (Sr,Pb)(Y,U)(Ti,Fe3+)20O38 |
| 4.CC.45 | Diaoyudaoite | NaAl11O17 |
| 4.CC.45 | Yimengite | K(Cr,Ti,Fe,Mg)12O19 |
| 4.CC.45 | Nežilovite | PbZn2Mn4+2Fe3+8O19 |
| 4.CC.45 | Hawthorneite | BaMgTi3Cr4Fe2+2Fe3+2O19 |
| 4.CC.45 | Mizraite-(Ce) | Ce(Al11Mg)O19 |
| 4.CC.45 | Haggertyite | BaFe2+4Fe3+2Ti5MgO19 |
| 4.CC.45 | Lindqvistite | Pb2Mn2+Fe16O27 |
| 4.CC.45 | Hibonite | CaAl12O19 |
| 4.CC.45 | Kangite | (Sc,Ti,Al,Zr,Mg,Ca,◻)2O3 |
| 4.CC.45 | Chihuahuaite | FeAl12O19 |
| 4.CC.45 | Barioferrite | BaFe3+12O19 |
| 4.CC.45 | Plumboferrite | Pb[Fe3+10.67Mn2+0.33Pb]O18.33 |
| 4.CC.45 | Batiferrite | BaTi2Fe3+8Fe2+2O19 |
| 4.CC.45 | Magnetoplumbite | PbFe3+12O19 |
| 4.CC.50 | Jeppeite | K2Ti6O13 |
| 4.CC.55 | Zenzénite | Pb3Fe3+4Mn4+3O15 |
| 4.CC.60 | 'Mengxianminite (of Huang et al.)' | (Ca,Na)3(Fe,Mn)2Mg2(Sn,Zn)5Al8O29 |
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 Davidite-(La)
mindat.org URL:
https://www.mindat.org/min-1234.html
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References for Davidite-(La)
Reference List:
Whittle, Alick W. G. (1959) The nature of davidite. Economic Geology, 54 (1) 64-81 doi:10.2113/gsecongeo.54.1.64
Neumann, Henrich; Sverdrup, Thor L. (1960) Contributions to the mineralogy of Norway. No. 8. Davidite from Tuftan, Iveland. Norsk Geologisk Tidsskrift [Norwegian Journal of Geology], 40 (3-4). 277-288
Butler, J. R., Hall, R. (1960) Chemical characteristics of davidite. Economic Geology, 55 (7) 1541-1550 doi:10.2113/gsecongeo.55.7.1541
Levinson, A. A. (1966) A system of nomenclature for rare-earth minerals. American Mineralogist, 51 (1-2) 152-158
Gatehouse, Bryan M., Grey, Ian E., Kelly, Patrick R. (1979) The crystal structure of davidite. American Mineralogist, 64 (9-10) 1010-1017
Localities for Davidite-(La)
Showing 36 localities.
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 | |
| Lawrence L.J. et al. Econ Geol. 52 |
| Dickinson S.B. et al. (1954) |
| Dickinson S.B. et al. (1954) |
| Hayton (1960) |
| SA Museum collections (Ex Mine Dpt collection) |
| PA Wulser Empa data | |
| Pepinnini Minerals website |
| Ludwig et al. (1984) | |
| Pepinnini Minerals data / Campana B. ... |
| Campana B. 1956 +1 other reference | |
| PAWulser - EMPA analysis (unpubl.) | |
| Whittle (1959) | |
| Campana B. 1956 +1 other reference | |
| Mawson (1906) +1 other reference |
China | |
| Zhang Peishan et al. (1996) |
| Zhang Peishan et al. (1996) | |
Czech Republic | |
| Pauliš P. et al. (Kutna Hora, issue 1) |
DR Congo | |
| Van Wambecke L. (1968) |
Finland | |
| Al-Ani et al. (2013) |
Iran | |
| Pavel M. Kartashov analytical data (2008) |
Kazakhstan | |
| Evseev (1995) |
Mongolia | |
| N.V. Vladykin data |
Mozambique | |
| PA Wulser - EMPA analyses +3 other references |
Norway | |
| Hansen (2001) |
| Eldjarn et al. (2022) |
| Svein (1988) |
Russia | |
| Pavel M. Kartashov (n.d.) |
| Kompanchenko et al. (2018) |
| Компанченко А.А. +1 other reference |
South Africa | |
| Cairncross et al. (1995) |
Spain | |
| Calvo Rebollar (2009) |
Switzerland | |
| Cuchet et al. (2014) |
Tajikistan | |
| Pavel M. Kartashov (n.d.) +1 other reference |
USA | |
| Pabst (1959) +3 other references |
| Rocks & Min.:64:471. +1 other reference |
Zambia | |
| www.zambeziresources.com |
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Billeroo Davidite Prospect, Mount Victor Plumbago Station, Pastoral Unincorporated Area, South Australia, Australia