Mineralogy Database

Jervisite Mineral Data

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General Jervisite Information

Help on Chemical  Formula: Chemical Formula: (Na,Ca,Fe++)(Sc,Mg,Fe++)Si2O6
Help on Composition: Composition: Molecular Weight = 223.42 gm
   Sodium      6.17 %  Na    8.32 % Na2O
   Calcium     5.38 %  Ca    7.53 % CaO
   Magnesium   3.26 %  Mg    5.41 % MgO
   Scandium   12.07 %  Sc   18.52 % Sc2O3
   Iron        5.00 %  Fe    6.43 % FeO
   Silicon    25.14 %  Si   53.79 % SiO2
   Oxygen     42.97 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na0.6Ca0.3Fe2+0.2Sc0.6Mg0.3Si2O6
Help on Environment: Environment: In miarolitic cavities in granite.
Help on IMA Status: IMA Status: Approved IMA 1982
Help on Locality: Locality: In the Diverio quarry, Mt. Mottarone, near Baveno, Piedmont, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for William P. Jervis, Curator of the Museo Industriale Italiano di Torino, Torino, Italy.
Help on Name Pronunciation: Name Pronunciation: Jervisite + Pronunciation Say JERVISITE
Help on Synonym: Synonym: ICSD 14263
  PDF 35-542

Jervisite Image

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  Cascandite   Jervisite

Comments: White, acicular jervisite crystals and pink cascandite crystals.
Location: Seula min,, Mount Camoscio, Oltrefiume, Baveno, Verbano-Cusio-Ossola Province, Piedmont, Italy. Scale: Crystal Size 1 mm.
© Sergio Varvello / Mineral Service

Jervisite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.0896:1:0.5874
Help on Cell Dimensions: Cell Dimensions: a = 9.853, b = 9.042, c = 5.312, Z = 4; beta = 106.62° V = 453.48 Den(Calc)= 3.27
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.038(1), 2.543(0.75), 2.979(0.75),

Physical Properties of Jervisite

Help on Cleavage: Cleavage: {110} Perfect
Help on Color: Color: Light green.
Help on Density: Density: 3.22
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Hardness: Hardness: 6-7 - Orthoclase-Quartz
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Jervisite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.026 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.011 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2163,KPDmeas= 0.2197,KC= 0.214
Ncalc = 1.69 - 1.7
Help on Optical Data: Optical Data: Biaxial (-), a=1.683, b=1.715, g=1.724, bire=0.0410

Calculated Properties of Jervisite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.22 gm/cc
note: Specific Gravity of Jervisite =3.27 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEJervisite = 4.97 barns/electron
U=PEJervisite x rElectron Density= 15.99 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Jervisite is Not Radioactive

Jervisite Classification

Help on  Dana Class: Dana Class: 65.01.03c.06 (65)Inosilicate Single-Width Unbranched Chains, W=1
  (65.01)with chains P=2
  (65.01.03c)C2/c clinopyroxenes (Na clinopyroxenes)
65.01.03c.01 Jadeite Na(Al,Fe)Si2O6 C 2/c 2/m
65.01.03c.02 Aegirine NaFeSi2O6 C 2/c 2/m
65.01.03c.03 Namansilite NaMn(Si2O6) C 2/c 2/m
65.01.03c.04 Kosmochlor NaCrSi2O6 C 2/c 2/m
65.01.03c.05 Natalyite Na(V,Cr)Si2O6 C 2/c 2/m
65.01.03c.06 Jervisite (Na,Ca,Fe)(Sc,Mg,Fe)Si2O6 C 2/c 2/m
Help on  Strunz Class: Strunz Class: 09.DA.25 09 - SILICATES (Germanates)
  09.D - Inosilicates* Structural terminology according to Liebau (1985)
  09.DA -Inosilicates with 2-periodic single chains, Si2O6; pyroxene family
09.DA.25 Aegirine NaFeSi2O6 C 2/c 2/m
09.DA.25 Jadeite Na(Al,Fe)Si2O6 C 2/c 2/m
09.DA.25 Kosmochlor NaCrSi2O6 C 2/c 2/m
09.DA.25 Jervisite (Na,Ca,Fe)(Sc,Mg,Fe)Si2O6 C 2/c 2/m
09.DA.25 Namansilite NaMn(Si2O6) C 2/c 2/m
09.DA.25 Natalyite Na(V,Cr)Si2O6 C 2/c 2/m

Other Jervisite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Jervisite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: 65.01.03c.06 Strunz No: 09.DA.25





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