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Davisite

A valid IMA mineral species
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09340880017761148097046.jpg
Davisite, etc.

Allende meteorite, Pueblito de Allende, Chihuahua, Mexico
09340880017761148097046.jpg
Davisite, etc.

Allende meteorite, Pueblito de Allende, Chihuahua, Mexico
09340880017761148097046.jpg
Davisite, etc.

Allende meteorite, Pueblito de Allende, Chihuahua, Mexico
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About DavisiteHide

Formula:
CaScAlSiO6
Colour:
Light gray in thin-section
Crystal System:
Monoclinic
Name:
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).

Second Ca-Al-Sc mineral after warkite.

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

Compare UM2004-50-SiO:AlFeGd.


Unique IdentifiersHide

Mindat ID:
38829
Long-form identifier:
mindat:1:1:38829:6

Similar NamesHide

DaviditeA synonym
Davidite-(Ce)A valid IMA mineral speciesCe(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38
Davidite-(La)A valid IMA mineral species - grandfatheredLa(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)
DaviesitA synonym of Hemimorphite
DaviesitePb-O-Cl-H (?)

IMA Classification of DavisiteHide

IMA status:
Approved
Approval year:
2008
First published:
2009

Classification of DavisiteHide

Strunz-mindat (2026):
9.DA.15

9 : SILICATES (Germanates)
D : Inosilicates
A : Inosilicates with 2-periodic single chains, Si2O6; pyroxene family
Dana 8th ed.:
65.1.3.7

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

Mineral SymbolsHide

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

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

Physical Properties of DavisiteHide

Transparency:
Transparent
Colour:
Light gray in thin-section

Chemistry of DavisiteHide

Mindat Formula:
CaScAlSiO6
Element Weights:
Element% weight
O40.660 %
Sc19.041 %
Ca16.975 %
Si11.896 %
Al11.428 %

Calculated from ideal end-member formula.
O
Sc
Ca
Si
Al
Elements listed:
Al, Ca, O, Sc, Si - search for minerals with similar chemistry
Common Impurities:
Mg,Ti(III),Ti(IV)

Crystallography of DavisiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Setting:
C2/c
Cell Parameters:
a = 9.884 Å, b = 8.988 Å, c = 5.446 Å
β = 105.86°
Ratio:
a:b:c = 1.1 : 1 : 0.606
Unit Cell V:
465.39 ų (Calculated from Unit Cell)
Twinning:
None observed.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0014124DavisiteOhashi H, Ii N (1978) Structure of calcium scandium aluminum silicate (CaScAlSiO6)-pyroxene, Journal of the Japanese Association of Mineralogists, Petrologists and Economic Geologists 73 267-2731978synthetic0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.039 Å(100)
2.989 Å(33)
2.619 Å(39)
2.600 Å(28)
2.564 Å(47)
2.159 Å(16)
2.063 Å(22)
1.676 Å(16)
Locality:
Allende meteorite, Pueblito de Allende, Chihuahua, Mexico

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 1: Primary nebular phases4.567-4.561
3 : Solar nebular condensates (CAIs, AOAs, URIs)>4.565

Type Occurrence of DavisiteHide

Type Locality:
ⓘ Allende meteorite, Pueblito de Allende, Chihuahua, Mexico
General Appearance of Type Material:
Fine-grained aggregate with REE-rich perovskite; main phase in ultra-refractory domains within amoeboidal olivine.
Place of Conservation of Type Material:
National Museum of Natural History, Washington D.C., USA, USNM 7555.
Geological Setting of Type Material:
Ultra-refractory inclusion in a meteorite.
Associated Minerals at Type Locality:
PerovskiteSpinel

Synonyms of DavisiteHide

Other Language Names for DavisiteHide

Dutch:Davisiet
German:Davisit

Relationship of Davisite to other SpeciesHide

Member of:
Clinopyroxene Subgroup > Pyroxene Group
Other Members of Clinopyroxene Subgroup:
AegirineNaFe3+Si2O6Mon. 2/m : B2/b
Aegirine-augite(NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6Mon. 2/m : B2/b
Augite(CaxMgyFez)(Mgy1Fez1)Si2O6Mon. 2/m : B2/b
BurnettiteCaVAlSiO6Mon. 2/m : B2/b
ClinoenstatiteMgSiO3Mon. 2/m : P21/c
ClinoferrosiliteFe2+2Si2O6Mon. 2/m : P21/c
ColomeraiteNaTi3+Si2O6Mon. 2/m : B2/b
DiopsideCaMgSi2O6Mon. 2/m : B2/b
EsseneiteCaFe3+[AlSiO6]Mon. 2/m : B2/b
GrossmaniteCaTi3+ AlSiO6Mon. 2/m : B2/b
HedenbergiteCaFe2+Si2O6Mon. 2/m : B2/b
JadeiteNa(Al,Fe3+)Si2O6Mon. 2/m : B2/b
JervisiteNaSc3+Si2O6Mon. 2/m : B2/b
JohannseniteCaMn2+Si2O6Mon. 2/m : B2/b
KanoiteMn2+MgSi2O6Mon. 2/m : P21/c
KosmochlorNaCrSi2O6Mon. 2/m : B2/b
KushiroiteCaAlAlSiO6Mon. 2/m : B2/b
NamansiliteNaMn3+Si2O6Mon. 2/m : B2/b
NatalyiteNaV3+Si2O6Mon. 2/m : B2/b
Omphacite(NaaCabFe2+cMgd)(AleFe3+fFe2+gMgh)Si2O6Mon. 2/m
PetedunniteCaZnSi2O6Mon. 2/m : B2/b
Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6Mon. 2/m : P21/c
RyabchikoviteCuMgSi2O6Mon. 2/m : P21/c
SpodumeneLiAlSi2O6Mon. 2/m : B2/b
Tissintite(Ca,◻)AlSi2O6Mon. 2/m : B2/b
'UM2003-36-SiO:CaNa'NaCrSi2O6 - CaMgSi2O6Mon. 2/m : B2/b

Common AssociatesHide

Associations Based on Photo Data:
4 photos of Davisite associated with SpinelMgAl2O4
3 photos of Davisite associated with PerovskiteCaTiO3
2 photos of Davisite associated with WarkiteCa2Sc6Al6O20
2 photos of Davisite associated with DiopsideCaMgSi2O6
2 photos of Davisite associated with Kangite(Sc,Ti,Al,Zr,Mg,Ca,◻)2O3
2 photos of Davisite associated with Melilite GroupA2M(XSiO7)
1 photo of Davisite associated with EringaiteCa3Sc2(SiO4)3
1 photo of Davisite associated with Panguite(Ti,Al,Sc,Mg,Zr,Ca)1.8O3
1 photo of Davisite associated with Olivine GroupM2SiO4
1 photo of Davisite associated with HiboniteCaAl12O19

Related Minerals - Strunz-mindat GroupingHide

9.DA.ColomeraiteNaTi3+Si2O6Mon. 2/m : B2/b
9.DA.ProtoenstatiteMg2Si2O6Orth. mmm(2/m2/m2/m) : Pbcn
9.DA.RyabchikoviteCuMgSi2O6Mon. 2/m : P21/c
9.DA.05DonpeacoriteMn2+MgSi2O6Orth. mmm(2/m2/m2/m) : Pbca
9.DA.05EnstatiteMg2Si2O6Orth. mmm(2/m2/m2/m) : Pbca
9.DA.05FerrosiliteFe2+2Si2O6Orth. mmm(2/m2/m2/m) : Pbca
9.DA.10ClinoenstatiteMgSiO3Mon. 2/m : P21/c
9.DA.10ClinoferrosiliteFe2+2Si2O6Mon. 2/m : P21/c
9.DA.10KanoiteMn2+MgSi2O6Mon. 2/m : P21/c
9.DA.10Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6Mon. 2/m : P21/c
9.DA.15GrossmaniteCaTi3+ AlSiO6Mon. 2/m : B2/b
9.DA.15DiopsideCaMgSi2O6Mon. 2/m : B2/b
9.DA.15 va'Jeffersonite'Ca(Mn,Zn,Fe)Si2O6
9.DA.15HedenbergiteCaFe2+Si2O6Mon. 2/m : B2/b
9.DA.15JohannseniteCaMn2+Si2O6Mon. 2/m : B2/b
9.DA.15PetedunniteCaZnSi2O6Mon. 2/m : B2/b
9.DA.15EsseneiteCaFe3+[AlSiO6]Mon. 2/m : B2/b
9.DA.15KushiroiteCaAlAlSiO6Mon. 2/m : B2/b
9.DA.15Augite(CaxMgyFez)(Mgy1Fez1)Si2O6Mon. 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.25JadeiteNa(Al,Fe3+)Si2O6Mon. 2/m : B2/b
9.DA.25NamansiliteNaMn3+Si2O6Mon. 2/m : B2/b
9.DA.25NatalyiteNaV3+Si2O6Mon. 2/m : B2/b
9.DA.25AegirineNaFe3+Si2O6Mon. 2/m : B2/b
9.DA.25JervisiteNaSc3+Si2O6Mon. 2/m : B2/b
9.DA.25Tissintite(Ca,◻)AlSi2O6Mon. 2/m : B2/b
9.DA.25KosmochlorNaCrSi2O6Mon. 2/m : B2/b
9.DA.30SpodumeneLiAlSi2O6Mon. 2/m : B2/b
9.DA.35HiroseiteFeSiO3Orth. mmm(2/m2/m2/m) : Pnma

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.

Internet Links for DavisiteHide

References for DavisiteHide

Localities for DavisiteHide

Showing 7 localities.

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.
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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.
Antarctica
 
  • East Antarctica
    • Victoria Land
      • Dominion Range
Ma et al. (2020)
Italy
 
  • Emilia-Romagna
    • Ferrara Province
      • Vigarano Mainarda
        • Vigarano Pieve
Ma (2012) +2 other references
Kazakhstan
 
  • Pavlodar Region
    • Pavlodar District
Ivanova et al. (2012)
Mexico (TL)
 
  • Chihuahua
    • Pueblito de Allende
Ma et al. (2009) +3 other references
Northwest Africa Meteorites
 
Ivanova et al. (2015)
Norway
 
  • Østfold
    • Moss
Krot et al. (2019)
Oman
 
  • Al Wusta Governorate
    • Sayh al Uhaymir
Zhang et al. (2015)
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