Juanite Mineral Data

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

Search for Juanite using:

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

Visit our Advertisers for Juanite :

A Bijoux Google Search for Juanite
Adam's Minerals Google Search for Juanite
Cape Minerals Google Search for Juanite
Dakota Matrix Minerals Google Search for Juanite
Excalibur Mineral Corp. Google Search for Juanite
Exceptional Minerals Google Search for Juanite
John Betts Fine Minerals Search for Juanite
McDougall Minerals Google Search for Juanite
Mineral News Website Link
Rock and Mineral Shows Google Search for Juanite
Weinrich Minerals, Inc. Google Search for Juanite

Ask about Juanite 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 Español

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: