Jadeite Mineral Data

Jadeite Mineral Data +

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General Jadeite Information

Chemical Formula:

Na(Al,Fe+++)Si2O6

Composition:

Molecular Weight = 205.03 gm

Sodium 11.21 % Na 15.11 % Na₂O

Aluminum 11.84 % Al 22.38 % Al₂O₃

Iron 2.72 % Fe 3.89 % Fe₂O₃

Silicon 27.40 % Si 58.61 % SiO₂

Oxygen 46.82 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

NaAl_0.9Fe³⁺_0.1(Si₂O₆)

Environment:

Strongly metamorphosed sodium-rich serpentinous rocks

IMA Status:

Valid Species (Pre-IMA) 1863

Locality:

Clear Creek, San Benito County, California. Near Tawmaw and Hpakan villages, Upper Burma. Link to MinDat.org Location Data.

Name Origin:

From the Spanish, piedra de ijada, "stone of the side," because its supposed to cure kidney ailments if applied to the side of the body.

Synonym:

ICSD 10232

PDF 22-1338

Jadeite Image

Images:

Jadeite

Comments: Fibrous crystals of Jadeite.
Location: Russian River, near Cloverdale, Mendocino County, California, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Images:

Jadeite Stronalsite

Comments: White stronalsite veinlets in massive pale green jadeite.
Location: Ohasa, Okayama, Japan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Jadeite Crystallography

Axial Ratios:

a:b:c =1.0999:1:0.6095

Cell Dimensions:

a = 9.418, b = 8.562, c = 5.219, Z = 4; beta = 107.56° V = 401.23 Den(Calc)= 3.39

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.83(1), 2.42(0.9), 2.92(0.8),

Crystal Structure:

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

View Additional jPOWD Structure files for Jadeite
[1] [2] [3] [4]

Physical Properties of Jadeite

Cleavage:

[110] Good

Color:

Green, White, Pale bluish gray, Grayish green, Pale purple.

Density:

3.25 - 3.35, Average = 3.3

Diaphaniety:

Translucent to subtranslucent

Fracture:

Tough - Difficult to break apart as shown by fibrous minerals and most metals.

Habit:

Fibrous - Crystals made up of fibers.

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Habit:

Massive - Fibrous - Distinctly fibrous fine-grained forms.

Hardness:

6.5 - Pyrite

Luminescence:

Non-fluorescent.

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Jadeite

Gladstone-Dale:

CI meas= 0.028 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.054 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1979,KPDmeas= 0.2033,KC= 0.2092

Optical Data:

Biaxial (+), a=1.654-1.673, b=1.659-1.679, g=1.667-1.693, bire=0.0130-0.0200, 2V(Calc)=68-78, 2V(Meas)=70-80. Dispersion r < v.

Pleochroism (x):

colorless or green.

Pleochroism (y):

colorless or yellowish green.

Pleochroism (z):

colorless or yellow.

Calculated Properties of Jadeite

Electron Density:

r_electron=3.26 gm/cc
note: r_Jadeite=3.30 gm/cc.

Fermion Index

Fermion Index = 0.01359
Boson Index = 0.98641

Photoelectric:

PE_Jadeite= 2.38 barns/electron
U=PE_Jadeite x r_electron= 7.76 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Jadeite is Not Radioactive

Jadeite Classification

Dana Class:

65.1.3c.1 (65)Inosilicate Single-Width Unbranched Chains, W=1

(65.1)with chains P=2

(65.1.3c)C2/c clinopyroxenes (Na clinopyroxenes)

65.1.3c.1 Jadeite Na(Al,Fe)Si2O6 C 2/c 2/m

65.1.3c.2 Aegirine NaFeSi2O6 C 2/c 2/m

65.1.3c.3 Namansilite NaMn(Si2O6) C 2/c 2/m

65.1.3c.4 Kosmochlor NaCrSi2O6 C 2/c 2/m

65.1.3c.5 Natalyite Na(V,Cr)Si2O6 C 2/c 2/m

65.1.3c.6 Jervisite (Na,Ca,Fe)(Sc,Mg,Fe)Si2O6 C 2/c 2/m

Strunz Class:

VIII/F.01-130 VIII - Silicates

VIII/F - Inosilicates (chain and band) double chains [Si2O6]4-

VIII/F.01 - Pyroxene group, Clinopyroxene

VIII/F.01-10 Clinoenstatite Mg2Si2O6 P 2₁/c 2/m

VIII/F.01-20 Clinoferrosilite (Fe,Mg)2Si2O6 P 2₁/c 2/m

VIII/F.01-30 Kanoite (Mn,Mg)2Si2O6 P 2₁/c 2/m

VIII/F.01-40 Pigeonite (Mg,Fe,Ca)(Mg,Fe)Si2O6 P 2₁/c 2/m

VIII/F.01-50 Diopside CaMgSi2O6 C 2/c 2/m

VIII/F.01-60 Hedenbergite CaFeSi2O6 C 2/c 2/m

VIII/F.01-70 Johannsenite CaMnSi2O6 C 2/c 2/m

VIII/F.01-80 Petedunnite Ca(Zn,Mn,Fe,Mg)Si2O6 C 2/c 2/m

VIII/F.01-90 Augite (Ca,Na)(Mg,Fe,Al,Ti)(Si,Al)2O6 C 2/c 2/m

VIII/F.01-100 Omphacite (Ca,Na)(Mg,Fe,Al)Si2O6 P 2/n 2/m

VIII/F.01-110 Esseneite CaFeAlSiO6 C 2/c 2/m

VIII/F.01-120 Spodumene LiAlSi2O6 C 2/c 2/m

VIII/F.01-130 Jadeite Na(Al,Fe)Si2O6 C 2/c 2/m

VIII/F.01-140 Aegirine NaFeSi2O6 C 2/c 2/m

VIII/F.01-145 Namansilite NaMn(Si2O6) C 2/c 2/m

VIII/F.01-150 Jervisite (Na,Ca,Fe)(Sc,Mg,Fe)Si2O6 C 2/c 2/m

VIII/F.01-160 Natalyite Na(V,Cr)Si2O6 C 2/c 2/m

VIII/F.01-170 Kosmochlor NaCrSi2O6 C 2/c 2/m

Other Jadeite Information

References:

NAME( Sinkankas66) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Heinrich65)

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Jadeite

Na(Al,Fe+++)Si2O6
Dana No: 65.1.3c.1 Strunz No: VIII/F.01-130
Locality:

Notes: