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Crystal System:
Named for Andrew M. Davis (1950 - ), Professor of Cosmochemistry, University of Chicago, in honor of his outstanding contributions to meteorite research.
Pyroxene Group, Clinopyroxene Subgroup. The Sc analogue of burnettite (V), esseneite (Fe3+), grossmanite (Ti3+), and kushiroite (Al).

Unique combination of elements.

Likely a product of condensation/evaporation within the solar nebula.

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Classification of DavisiteHide

Approval Year:

9 : SILICATES (Germanates)
D : Inosilicates
A : Inosilicates with 2-periodic single chains, Si2O6; pyroxene family

65 : INOSILICATES Single-Width,Unbranched Chains,(W=1)
1 : Single-Width Unbranched Chains, W=1 with chains P=2

Chemical Properties of DavisiteHide

Common Impurities:

Crystallography of DavisiteHide

Crystal System:
Class (H-M):
2/m - Prismatic
Space Group:
Cell Parameters:
a = 9.884 Å, b = 8.988 Å, c = 5.446 Å
β = 105.86°
a:b:c = 1.1 : 1 : 0.606
Unit Cell V:
465.39 ų (Calculated from Unit Cell)

X-Ray Powder DiffractionHide

Powder Diffraction Data:
3.039 (100)
2.989 (33)
2.619 (39)
2.600 (28)
2.564 (47)
2.159 (16)
2.063 (22)
1.676 (16)

Type Occurrence of DavisiteHide

General Appearance of Type Material:
fine-grained aggregate with REE-rich perovskite; main phase in ultra-refractory domains within amoeboidal olivine
Associated Minerals at Type Locality:

Synonyms of DavisiteHide

Related Minerals - Nickel-Strunz GroupingHide

9.DA.ProtoenstatiteMg2Si2O6Orth. mmm (2/m 2/m 2/m) : Pbcn
9.DA.05EnstatiteMgSiO3Orth. mmm (2/m 2/m 2/m) : Pbca
9.DA.05FerrosiliteFeSiO3Orth. mmm (2/m 2/m 2/m) : Pbca
9.DA.10ClinoenstatiteMgSiO3Mon. 2/m : P21/b
9.DA.10ClinoferrosiliteFe2+SiO3Mon. 2/m : P21/b
9.DA.10KanoiteMn2+(Mg,Mn2+)Si2O6Mon. 2/m : P21/b
9.DA.10Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6Mon. 2/m : P21/b
9.DA.15Augite(CaxMgyFez)(Mgy1Fez1)Si2O6Mon. 2/m : B2/b
9.DA.15DiopsideCaMgSi2O6Mon. 2/m : B2/b
9.DA.15EsseneiteCaFe3+[AlSiO6]Mon. 2/m : B2/b
9.DA.15HedenbergiteCaFe2+Si2O6Mon. 2/m : B2/b
9.DA.15JohannseniteCaMn2+Si2O6Mon. 2/m : B2/b
9.DA.15KushiroiteCaAl[AlSiO6]Mon. 2/m : B2/b
9.DA.15GrossmaniteCaTi3+ AlSiO6Mon. 2/m : B2/b
9.DA.20Aegirine-augite(NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6Mon. 2/m : B2/b
9.DA.20Omphacite(NaaCabFe2+cMgd)(AleFe3+fFe2+gMgh)Si2O6Mon. 2/m
9.DA.25AegirineNaFe3+Si2O6Mon. 2/m : B2/b

Related Minerals - Dana Grouping (8th Ed.)Hide[AlSiO6]Mon. 2/m : B2/b

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 DavisiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Ma, C., Rossman, G.R. (2009) Davisite, CaScAlSiO6, a new pyroxene from the Allende meteorite. American Mineralogist 94, 845-848.

Internet Links for DavisiteHide

Localities for DavisiteHide

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.
  • Emilia-Romagna
    • Ferrara Province
      • Vigarano Mainarda
        • Vigarano Pieve
Ma, C., Krot, A.N., Beckett, J.R., Nagashima, K. and Tschauner, O. (2015) Discovery of warkite, Ca2Sc6Al6O20, a new Sc-rich ultra-refractory mineral in Murchinson and Vigarano. 78th Annual Meeting of the Meteoritical Society, volume 50, paper id. 5025; Ma, C., Yoshizaki, T., Krot, A.N., Beckett, J.R., Nakamura, T., Nagashima, K., Muto, J., and Ivanova, M.A. (2017) Discovery of rubinite, Ca3Ti3+2Si3O12, a new garnet mineral in refractory inclusions from carbonaceous chondrites. 80th Annual Meeting of the Meteoritical Society (LPI Contrib. No. 1987), paper id. 6023.
  • Pavlodar
    • Pavlodar
Ivanova, M. A., Krot, A. N., Nagashima, K. & MacPherson, G. J. (2012). Meteoritics & Planetary Science 47 (12): 2107-2127. (Dec 2012)
Mexico (TL)
  • Chihuahua
    • Pueblito de Allende
Am. Min. 94,845(2009); Ma, C., Paque, J., & Tschauner, O. (2016, March). Discovery of Beckettite, Ca2V6Al6O20, a New Alteration Mineral in a V-Rich Ca-Al-Rich Inclusion from Allende. In Lunar and Planetary Science Conference (Vol. 47, p. 1704).
Mineral and/or Locality  
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