Juanite Mineral Data

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General Juanite Information

Chemical Formula:

Ca10Mg4Al2Si11O39•4(H2O) (?)

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

Empirical Formula:

Ca₁₀Mg₄Al₂Si₁₁O₃₉•4(H₂O)

Environment:

Alteration product of melilite.

IMA Status:

Valid Species (Pre-IMA) 1932

Locality:

Iron Hill, Powderhorn-Cebolla district, Gunnison County, Colorado. USA. Link to MinDat.org Location Data.

Name Origin:

Named for the San Juan Mountains, Colorado, USA.

Name Pronunciation:

Juanite

Juanite Image

Images:

Juanite

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

Crystal System:

OrthorhombicSpace Group: Unk

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 1.93(1), 2.98(1), 3.27(1),

Physical Properties of Juanite

Color:

White, Pistachio green, Brown.

Density:

3.01 - 3.28, Average = 3.14

Diaphaneity:

Translucent

Habit:

Fibrous - Crystals made up of fibers.

Hardness:

5.5 - Knife Blade

Optical Properties of Juanite

Gladstone-Dale:

CI meas= 0.044 (Good) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.2045,KC= 0.2139
Ncalc = 1.64 - 1.7

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

Electron Density:

Bulk Density (Electron Density)=3.15 gm/cc
note: Specific Gravity of Juanite =3.15 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Juanite= 4.15 barns/electron
U=PE_Juanite x rElectron Density= 13.09 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Juanite is Not Radioactive

Juanite Classification

Dana Class:

78.07.06.01 (78)Unclassified silicates

(78.07)wholly unclassified silicates

(78.07.06)Dana Group

78.07.06.01 Juanite Ca10Mg4Al2Si11O39•4(H2O)(?) Unk Ortho

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

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)

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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Ask about Juanite here :
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Print or Cut-and-Paste your Juanite Specimen Label here :

Juanite

Ca10Mg4Al2Si11O39•4(H2O) (?)
Dana No: 78.07.06.01 Strunz No: 09.HA.70
Locality:

Notes: