Mineralogy Database

Junitoite Mineral Data

Search Webmineral :

General Junitoite Information

Help on Chemical  Formula: Chemical Formula: CaZn2Si2O7•(H2O)
Help on Composition: Composition: Molecular Weight = 357.04 gm
   Calcium   11.23 %  Ca   15.71 % CaO
   Zinc      36.63 %  Zn   45.59 % ZnO
   Silicon   15.73 %  Si   33.66 % SiO2
   Hydrogen   0.56 %  H     5.05 % H2O
   Oxygen    35.85 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaZn2Si2O7•(H2O)
Help on Environment: Environment: In a retrogressively altered tactite zone, closely related to the breakdown of sphalerite in the ores.
Help on IMA Status: IMA Status: Approved IMA 1976
Help on Locality: Locality: Christmas copper mine, Gila County, Arizona, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Jun Ito (1926-1978), Japanese-American mineral chemist, Harvard University, Cambridge, Massachusetts, USA.
Help on Name Pronunciation: Name Pronunciation: Junitoite + Pronunciation Say JUNITOITE
Help on Synonym: Synonym: ICSD 40526
  PDF 29-394

Junitoite Image

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


Comments: Platy transparent junitoite crystal cluster lying flat on white limestone matrix.
Location: Christmas Mine, near Hayden, Gila County, Arizona. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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


Comments: Clear, platy, flat lying crystals of junitoite (red marker) to 2mm associated with lavender smectite.
Location: Christmas mine, Gila Co., Arizona, USA. Scale: Picture size 5 mm.
© Tom Loomis / Dakota Matrix

Junitoite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5045:1:0.6837
Help on Cell Dimensions: Cell Dimensions: a = 6.309, b = 12.503, c = 8.549, Z = 4; V = 674.36 Den(Calc)= 3.52
Help on Crystal System: Crystal System: Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: Bbm2
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.54(1), 2.816(1), 3.528(1),

Physical Properties of Junitoite

Help on Cleavage: Cleavage: {010} Good
Help on Color: Color: Colorless, White.
Help on Density: Density: 3.5
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Hardness: Hardness: 4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Junitoite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.013 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.018 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1886,KPDmeas= 0.1897,KC= 0.1922
Ncalc = 1.67 - 1.68
Help on Optical Data: Optical Data: Biaxial (?), a=1.656, b=1.664, g=1.672, bire=0.0160, 2V(Calc)=88, 2V(Meas)=86.

Calculated Properties of Junitoite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.41 gm/cc
note: Specific Gravity of Junitoite =3.50 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEJunitoite = 20.00 barns/electron
U=PEJunitoite x rElectron Density= 68.24 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Junitoite is Not Radioactive

Junitoite Classification

Help on  Dana Class: Dana Class: (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O
  (56.02)with cations in [4] and/or >[4] coordination
  (56.02.01)Dana Group Junitoite CaZn2Si2O7•(H2O) Bbm2 mm2
Help on  Strunz Class: Strunz Class: 09.BD.15 09 - SILICATES (Germanates)
  09.B - Sorosilicates
  09.BD -Si2O7 groups with additional anions;
09.BD.15 Junitoite CaZn2Si2O7•(H2O) Bbm2 mm2

Other Junitoite 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 Junitoite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Franklin Minerals(Dunn)
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info

Search for Junitoite using:

Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Junitoite :

Ask about Junitoite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espaņol

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


Dana No: Strunz No: 09.BD.15





Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.