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Jadeite

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Formula:
Na(Al,Fe3+)Si2O6
System:
Monoclinic
Colour:
apple-green, greenish ...
Hardness:
6
Pyroxene Group - Clinopyroxene Subgroup.

Used as a decorative stone or for carvings (see Jade).

Visit gemdat.org for gemological information about Jadeite.

Classification of Jadeite

Approved, 'Grandfathered' (first described prior to 1959)
8/F.01-130
9.DA.25

9 : SILICATES (Germanates)
D : Inosilicates
A : Inosilicates with 2-periodic single chains, Si2O6; pyroxene family
65.1.3c.1

65 : INOSILICATES Single-Width,Unbranched Chains,(W=1)
1 : Single-Width Unbranched Chains, W=1 with chains P=2
16.2.10

16 : Silicates Containing Aluminum and other Metals
2 : Aluminosilicates of Na
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Type Occurrence of Jadeite

Physical Properties of Jadeite

Colour:
apple-green, greenish white, purplish blue, blue-green
Streak:
white
Hardness (Mohs):
6
Cleavage:
Distinct/Good

Crystallography of Jadeite

Crystal System:
Monoclinic
Cell Parameters:
a = 9.43Å, b = 8.57Å, c = 5.22Å
β = 107.58°
Ratio:
a:b:c = 1.1 : 1 : 0.609
Unit Cell Volume:
V 402.15 ų (Calculated from Unit Cell)

Crystallographic forms of Jadeite

Crystal Atlas:
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Jadeite - Tabular {100}
Jadeite - Prismatic {110}
3d models and HTML5 code kindly provided by www.smorf.nl.

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X-Ray Powder Diffraction:
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Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Optical Data of Jadeite

Type:
Biaxial (+)
RI values:
nα = 1.654 - 1.673 nβ = 1.659 - 1.679 nγ = 1.667 - 1.693
2V:
Measured: 70° to 80°, Calculated: 68° to 78°
Max Birefringence:
δ = 0.013 - 0.020
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r < v

Chemical Properties of Jadeite

Formula:
Na(Al,Fe3+)Si2O6
All elements listed in formula:
Common Impurities:
Ti,Mn,Mg,Ca,K,H2O

Relationship of Jadeite to other Species

Other Members of Group:
AegirineNaFe3+Si2O6
Aegirine-augite(Na,Ca)(Fe3+,Fe2+,Mg,Al)Si2O6
Augite(Ca,Na)(Mg,Fe2+,Al,Fe3+,Ti)[(Si,Al)2O6]
ClinoenstatiteMgSiO3
ClinoferrosiliteFe2+SiO3
DiopsideCaMgSi2O6
EsseneiteCaFe3+[AlSiO6]
HedenbergiteCaFe2+Si2O6
Jervisite(Na,Ca,Fe2+)(Sc,Mg,Fe2+)Si2O6
JohannseniteCaMn2+Si2O6
KanoiteMn2+(Mg,Mn2+)Si2O6
KosmochlorNaCrSi2O6
KushiroiteCaAl[AlSiO6]
NamansiliteNaMn3+Si2O6
NatalyiteNaV3+Si2O6
Omphacite(Ca,Na)(Mg,Al)Si2O6
PetedunniteCa(Zn,Mn2+,Mg,Fe2+)Si2O6
Pigeonite(Mg,Fe2+,Ca)(Mg,Fe2+)Si2O6
SpodumeneLiAlSi2O6
9.DA.05Donpeacorite(Mn2+,Mg)Mg[SiO3]2
9.DA.05EnstatiteMgSiO3
9.DA.05FerrosiliteFeSiO3
9.DA.10ClinoenstatiteMgSiO3
9.DA.10ClinoferrosiliteFe2+SiO3
9.DA.10KanoiteMn2+(Mg,Mn2+)Si2O6
9.DA.10Pigeonite(Mg,Fe2+,Ca)(Mg,Fe2+)Si2O6
9.DA.15Augite(Ca,Na)(Mg,Fe2+,Al,Fe3+,Ti)[(Si,Al)2O6]
9.DA.15DiopsideCaMgSi2O6
9.DA.15EsseneiteCaFe3+[AlSiO6]
9.DA.15HedenbergiteCaFe2+Si2O6
9.DA.15JohannseniteCaMn2+Si2O6
9.DA.15PetedunniteCa(Zn,Mn2+,Mg,Fe2+)Si2O6
9.DA.15DavisiteCaScAlSiO6
9.DA.15KushiroiteCaAl[AlSiO6]
9.DA.15GrossmaniteCaTi3+ AlSiO6
9.DA.20Aegirine-augite(Na,Ca)(Fe3+,Fe2+,Mg,Al)Si2O6
9.DA.20Omphacite(Ca,Na)(Mg,Al)Si2O6
9.DA.25AegirineNaFe3+Si2O6
9.DA.25Jervisite(Na,Ca,Fe2+)(Sc,Mg,Fe2+)Si2O6
9.DA.25KosmochlorNaCrSi2O6
9.DA.25NamansiliteNaMn3+Si2O6
9.DA.25NatalyiteNaV3+Si2O6
9.DA.30SpodumeneLiAlSi2O6
16.2.1AlbiteNa(AlSi3O8)
16.2.2AnalcimeNa(AlSi2O6) · H2O
16.2.3UssingiteNa2AlSi3O8OH
16.2.4ParagoniteNaAl2(AlSi3O10)(OH)2
16.2.5NatroliteNa2Al2Si3O10 · 2H2O
16.2.6Tetranatrolite
16.2.7ParanatroliteNa2Al2Si3O10 · 3H2O
16.2.8EphesiteLiNaAl2(Al2Si2O10)(OH)2
16.2.9Rectorite(Na,Ca)Al4((Si,Al)8O20)(OH)4 · 2H2O
16.2.11Brammallite(Na,H3O)(Al,Mg,Fe)2((Si,Al)4O10)(OH)2

Other Names for Jadeite

Name in Other Languages:
Croatian:Jadeit
Dutch:Jadeiet
Italian:Jadeite
Russian:Жадеит
Simplified Chinese:硬玉
Turkish:Jadeit
Ukrainian:Жадеїт

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.

References for Jadeite

Reference List:
Prewitt, C.T., Burnham, C.W. (1964) Crystal structure of jadeite, NaAlSi2O6 (abstract): Geological Society of America Program, Miami, Florida, meeting: 156, November 1964.

Prewitt, C.T., Burnham, C.W. (1966) The crystal structure of jadeite, NaAlSi2O6. American Mineralogist: 51: 956-975.

Clark, J.R., Appleman, D.E., Papike, J.J. (1969) Crystal-chemical characterization of clinopyroxenes based on eight new structure refinements. MSA Special Paper: 2: 31-50.

Cameron, M., Shigeho, S., Prewitt, C.T., Papike, J.J. (1973) High temperature crystal chemistry of acmite, diopside, hedenbergite, jadeite, spodumene and ureyite. American Mineralogist: 58: 594-618.

Rossi, G., Smith, D.C., Ungaretti, L., Domeneghetti, M.C. (1983) Crystal-chemistry and cation ordering in the system diopside-jadeite: a detailed study by crystal structure refinement. Contributions to Mineralogy and Petrology: 83: 247-258.

Morimoto, N. (1989) Nomenclature of pyroxenes. The Canadian Mineralogist: 27: 143-156.

Internet Links for Jadeite

Localities for Jadeite

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.
Mineral and/or Locality  
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