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Specific Gravity:
4.84 (Calculated)
Crystal System:
Named after the Allende meteorite, which fell in Puebilito de Allende, Chihuahua, Mexico in 1969
Well-known as a synthetic compound.
Crystal structure is derived from the fluorite structure type.

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Classification of AllendeiteHide

Approval Year:

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

6 : Miscellaneous

Physical Properties of AllendeiteHide

4.84 g/cm3 (Calculated)

Chemical Properties of AllendeiteHide


Crystallography of AllendeiteHide

Crystal System:
Class (H-M):
3 - Rhombohedral
Space Group:
Cell Parameters:
a = 9.396 Å, c = 8.720 Å
a:c = 1 : 0.928
Unit Cell V:
666.7 ų

X-Ray Powder DiffractionHide

Powder Diffraction Data:
4.698 (5)
2.900 (100)
2.513 (18)
1.779 (27)
1.776 (32)
1.515 (19)
1.450 (4)
1.152 (4)

Type Occurrence of AllendeiteHide

Geological Setting of Type Material:
Found in the Allende meteorite as micro- to nano-crystals in an ultrarefractory inclusion, ACM-1

Synonyms of AllendeiteHide

Related Minerals - Nickel-Strunz GroupingHide

4.CC.15GrossiteCaAl4O7Mon. 2/m : B2/b
4.CC.20ChlormayeniteCa12Al14O32[◻4Cl2]Iso. 4 3m : I4 3d
4.CC.25YafsoaniteCa3Zn3(TeO6)2Iso. m3 (2/m 3)
4.CC.30LatrappiteCa2NbFe3+O6Orth. mmm (2/m 2/m 2/m) : Pnma
4.CC.30LueshiteNaNbO3Orth. mmm (2/m 2/m 2/m)
4.CC.30PerovskiteCaTiO3Orth. mmm (2/m 2/m 2/m) : Pnma
4.CC.30BarioperovskiteBaTiO3Orth. mm2 : Amm2
4.CC.30LakargiiteCa(Zr,Sn,Ti)O3Orth. mmm (2/m 2/m 2/m) : Pnma
4.CC.30MegawiteCaSnO3Orth. mmm (2/m 2/m 2/m) : Pban
4.CC.35MacedonitePbTiO3Tet. 4/mmm (4/m 2/m 2/m) : P4/nmm
4.CC.35TausoniteSrTiO3Iso. 4 3m
4.CC.35Isolueshite(Na,La)NbO3Iso. m3m (4/m 3 2/m) : Pm3m
4.CC.40CrichtoniteSr(Mn,Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH)38Trig. 3 : R3
4.CC.40Davidite-(Ce)(Ce,La)(Y,U,Fe)(Ti,Fe)20(O,OH)38Trig. 3 : R3
4.CC.40Davidite-(Y)(La,Ce,Na,Ca,Pb)(Y,Fe2+,◻)(Fe2+,Mn2+)2(Ti,Fe3+,Nb,Zr)18O38 (hypothetical)Trig.
4.CC.40LandauiteNaMnZn2(Ti,Fe)6Ti12O38Trig. 3 : R3
4.CC.40Mathiasite(K, Ba, Sr)(Zr, Fe)(Mg,Fe)2 (Ti,Cr,Fe)18O38Trig.
4.CC.40Dessauite-(Y)(Sr,Pb)(Y,U)(Ti,Fe3+)20O38Trig. 3 : R3
4.CC.40Cleusonite(Pb,Sr)(U4+,U6+)(Fe2+,Zn)2(Ti,Fe2+,Fe3+)18(O,OH)38Trig. 3 : R3
4.CC.40Gramaccioliite-(Y)(Pb,Sr)(Y,Mn)Fe3+2(Ti,Fe3+)18O38Trig. 3
4.CC.45HawthorneiteBaMgTi3Cr4Fe2+2Fe3+2O19Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
4.CC.45PlumboferritePb2(Fe3+,Mn2+,Mg)11O19Trig. 3 2
4.CC.45HaggertyiteBaFe2+4Fe3+2Ti5MgO19Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
4.CC.45NežilovitePbZn2Mn4+2Fe3+8O19Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
4.CC.45Hibonite-(Fe)(Fe,Mg)Al12O19Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
4.CC.45BarioferriteBaFe3+12O19Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
4.CC.60Mengxianminite (of Huang et al.)(Ca,Na)3(Fe,Mn)2Mg2(Sn,Zn)5Al8O29

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for AllendeiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Collongues, Robert; Qucyroux, Francine; Jorba, Monique Perez y; Gilles, Jean Claude (1965): Structure and properties of the compounds of rare earth oxides with oxides of the Group IV elements. Bulletin de la Societe Chimique de France 1965, 1141-1149.
Thornber, M. R.; Bevan, D. J. M.; Graham, J. (1968): Mixed oxides of the type MO2(fluorite)-M2O3. III. Crystal structures of the intermediate phases Zr5Sc2O13 and Zr3Sc4O12. Acta Crystallographica, B24, 1183-1190.
Rossell, H. J. (1976): Crystal structures of some fluorite-related M7O12 compounds. Journal of Solid State Chemistry 19, 103-111.
Magunov, R. L.; Shklyar, G. L.; Katridi, V. F. (1989): The phase diagrams of the zirconia (hafnia)-scandium sesquioxide systems. Izvestiya Akademii Nauk SSSR, Neorganicheskie Materialy 25, 1224-1226.
Red'ko, V. P.; Lopato, L. M. (1991): Crystal structure of rare earth zirconates M4Zr3O12 and hafnates M4Hf3O12 (M = rare earth). Neorganicheskie Materialy 27, 1905-1910.
Bevan, D. J. M.; Mohyla, J.; Wallwork, Kia S.; Rossell, H. J.; Schweda, Eberhard (2002): Structural principles for anion-deficient, fluorite-related superstructures in the zirconia-scandia system. Zeitschrift für Anorganische und Allgemeine Chemie 628, 1180-1186.
Stanek, C. R.; Jiang, C.; Uberuaga, B. P.; Sickafus, K. E.; Cleave, A. R.; Grimes, R. W. (2009): Predicted structure and stability of A4B3O12 delta-phase compositions. Physical Review B: Condensed Matter and Materials Physics 80, 174101/1-174101/11.
Ma, C., J.R.Beckett & G.R.Rossman (2009): Allendeite and hexamolybdenum: two new ultra-refractory minerals in Allende and two missing links. 40th Lunar and Planetary Science Conference and Abstracts, 1402 (2009)
Ma, C., Beckett, J.R., Rossman, G.R. (2014): Allendeite (Sc4Zr3O12) and hexamolybdenum (Mo,Ru,Fe), two new minerals from an ultrarefractory inclusion from the Allende meteorite. American Mineralogist, 99, 654-666.

Internet Links for AllendeiteHide

Localities for AllendeiteHide

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 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • Shaanxi Province
    • Hanzhong Prefecture
      • Ningqiang Co.
Wang, Y. & Hsu, W. (2009). Petrology and Mineralogy of the Ningqiang carbonaceous chondrite. Meteoritics & Planetary Science Vol. 44, #5, 763-780. (May 2009).
Mexico (TL)
  • Chihuahua
    • Pueblito de Allende
Ma, C., Beckett, J.R., Rossman, G.R. (2014): Allendeite (Sc4Zr3O12) and hexamolybdenum (Mo,Ru,Fe), two new minerals from an ultrarefractory inclusion from the Allende meteorite. American Mineralogist, 99, 654-666
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