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Tschernichite Mineral Data

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General Tschernichite Information

Help on Chemical  Formula: Chemical Formula: (Ca,Na)(Si6Al2)O16•4-8(H2O)
Help on Composition: Composition: Molecular Weight = 658.39 gm
   Sodium     0.87 %  Na    1.18 % Na2O
   Calcium    4.57 %  Ca    6.39 % CaO
   Aluminum   8.20 %  Al   15.49 % Al2O3
   Silicon   25.59 %  Si   54.76 % SiO2
   Hydrogen   2.45 %  H    21.89 % H2O
   Oxygen    58.32 %  O
            ______        ______ 
            100.00 %       99.70 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca0.75Na0.25Si6Al2O16•8(H2O)
Help on Environment: Environment: In vesicles in an olivine basalt, formed by hydrothermal action. Monoclinic polymorph may be a separate species.
Help on IMA Status: IMA Status: Approved IMA 1991
Help on Locality: Locality: Neer Road pit, Goble, Colombia County, Oregon, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Rudy Warren Tschernich (1945-), amateur mineralogist specializing in zeolites.
Help on Name Pronunciation: Name Pronunciation: Tschernichite + Pronunciation Say TSCHERNICHITE
Help on Synonym: Synonym: IMA1989-037

Tschernichite Image

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Comments: Clear crystal of tschernichite in a vug.
Location: Goble, Colombia County, Oregon, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Tschernichite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.94254
Help on Cell Dimensions: Cell Dimensions: a = 12.88, c = 25.02, Z = 8; V = 4,150.68 Den(Calc)= 2.11
Help on Crystal System: Crystal System: Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: P 4/mmm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 4.03(1), 11.6(0.32), 2.114(0.16),3.156(0.16), 3.062(0.15), 4.22(0.14), 12.5(0.1),

Physical Properties of Tschernichite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless, Milky white.
Help on Density: Density: 2.02
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Druse - Crystal growth in a cavity which results in numerous crystal tipped surfaces.
Help on Hardness: Hardness: 4.5 - Between Fluorite and Apatite
Help on Luminescence: Luminescence: Sometimes Fluorescent, Short UV=pale yellow, Long UV=pale yellow.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Tschernichite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.014 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.029 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2291,KPDmeas= 0.2394,KC= 0.236
Ncalc = 1.48 - 1.5
Help on Optical Data: Optical Data: Uniaxial (-), e=1.483, w=1.484, bire=0.0010.

Calculated Properties of Tschernichite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.06 gm/cc
note: Specific Gravity of Tschernichite =2.02 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PETschernichite = 1.84 barns/electron
U=PETschernichite x rElectron Density= 3.79 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Tschernichite is Not Radioactive

Tschernichite Classification

Help on  Dana Class: Dana Class: (77)Tectosilicate Zeolite group
  (77.01)true zeolites
  (77.01.08)Unclassified zeolite species Bellbergite (K,Ba,Sr)2Sr2Ca2(Ca,Na)4Al18Si18O72•30(H2O) P 63/mmc, P 62c-, P 63mc Hex Tschernichite (Ca,Na)(Si6Al2)O16•4-8(H2O) P 4/mmm 4/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 09.GF.30 09 - SILICATES (Germanates)
  09.G - Tektosilicates with Zeolitic H2O
  09.GF -Other Rare Zeolites
09.GF.30 Tschernichite (Ca,Na)(Si6Al2)O16•4-8(H2O) P 4/mmm 4/m 2/m 2/m

Other Tschernichite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Am.Min.,Vol.78,p822-826,1993) OPTIC PROP.(Am.Min.,Vol.78,p822-826,1993)
Help on See Also: See Also: Links to other databases for Tschernichite :
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: Strunz No: 09.GF.30





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