Jervisite Mineral Data (original) (raw)

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

Click Here for Larger Jervisite Image in a New Browser Window Images:

Click Here for Larger Jervisite Image Jervisite Cascandite 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 - PrismaticH-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),

Click Here for Large Jervisite Structure Window Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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| | Hawthorne F C , Grundy H D , Acta Crystallographica, Section B , 29 (1973) p.2615-2616, Refinement of the crystal structure of NaScSi2O6, Locality: synthetic | | ---------------------------------------------------------------------------------------------------------------------------------------------------------------- |

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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Print or Cut-and-Paste your Jervisite Specimen Label here :

Jervisite

(Na,Ca,Fe++)(Sc,Mg,Fe++)Si2O6
Dana No: 65.01.03c.06 Strunz No: 09.DA.25
Locality:

Notes: