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Juanite Mineral Data

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General Juanite Information

Help on Chemical  Formula: Chemical Formula: Ca10Mg4Al2Si11O39•4(H2O) (?)
Help on Composition: Composition: Molecular Weight = 1,556.94 gm
   Calcium    25.74 %  Ca   36.02 % CaO
   Magnesium   6.24 %  Mg   10.35 % MgO
   Aluminum    3.47 %  Al    6.55 % Al2O3
   Silicon    19.84 %  Si   42.45 % SiO2
   Hydrogen    0.52 %  H     4.63 % H2O
   Oxygen     44.19 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca10Mg4Al2Si11O39•4(H2O)
Help on Environment: Environment: Alteration product of melilite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1932
Help on Locality: Locality: Iron Hill, Powderhorn-Cebolla district, Gunnison County, Colorado. USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the San Juan Mountains, Colorado, USA.
Help on Name Pronunciation: Name Pronunciation: Juanite Say JUANITE

Juanite Image

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Comments: Light greenish translucent grains of juanite with dark magnetite.
Location: Iron Hill, Gunnison Co., Colorado, USA. Scale: Picture size 1 cm.
© Tom Loomis / Dakota Matrix

Juanite Crystallography

Help on Crystal System: Crystal System: Orthorhombic Space Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.93(1), 2.98(1), 3.27(1),

Physical Properties of Juanite

Help on Color: Color: White, Pistachio green, Brown.
Help on Density: Density: 3.01 - 3.28, Average = 3.14
Help on Diaphaneity: Diaphaneity: Translucent
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Hardness: Hardness: 5.5 - Knife Blade

Optical Properties of Juanite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.044 (Good) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.2045,KC= 0.2139
Ncalc = 1.64 - 1.7
Help on Optical Data: Optical Data: Biaxial (+), a=1.64, b=1.642, g=1.647, bire=0.0070, 2V(Calc)=66, 2V(Meas)=50.

Calculated Properties of Juanite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.15 gm/cc
note: Specific Gravity of Juanite =3.15 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEJuanite = 4.15 barns/electron
U=PEJuanite x rElectron Density= 13.09 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Juanite is Not Radioactive

Juanite Classification

Help on  Dana Class: Dana Class: (78)Unclassified silicates
  (78.07)wholly unclassified silicates
  (78.07.06)Dana Group Juanite Ca10Mg4Al2Si11O39•4(H2O)(?) Unk Ortho
Help on  Strunz Class: Strunz Class: 09.HA.70 09 - SILICATES (Germanates)
  09.H - Unclassified Silicates
  09.HA -With alkali and alkali-earth Elements
09.HA.70 Juanite Ca10Mg4Al2Si11O39•4(H2O)(?) Unk Ortho

Other Juanite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Juanite :
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 Juanite Specimen Label here :


Ca10Mg4Al2Si11O39•4(H2O) (?)
Dana No: Strunz No: 09.HA.70





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