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Juanite Mineral Data
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General Juanite Information
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 Chemical Formula: |
Ca10Mg4Al2Si11O39•4(H2O) (?) |
| Composition: |
Molecular Weight = 1,556.94 gm |
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Calcium 25.74 % Ca 36.02 % CaO |
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Magnesium 6.24 % Mg 10.35 % MgO |
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Aluminum 3.47 % Al 6.55 % Al2O3 |
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Silicon 19.84 % Si 42.45 % SiO2 |
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Hydrogen 0.52 % H 4.63 % H2O |
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Oxygen 44.19 % O |
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______ ______ |
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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  |
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Juanite Image |
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Images:
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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 |
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Juanite Crystallography
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| Crystal System: |
Orthorhombic Space Group: Unk |
| X Ray Diffraction: |
By Intensity(I/Io): 1.93(1), 2.98(1), 3.27(1), |
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Physical Properties of Juanite
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| 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 |
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Optical Properties of Juanite
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| 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. |
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Calculated Properties of Juanite
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| Electron Density: |
Bulk Density (Electron Density)=3.15 gm/cc
note: Specific Gravity of Juanite =3.15 gm/cc.
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| Fermion Index: |
Fermion Index = 0.01
Boson Index = 0.99 |
| Photoelectric: |
PEJuanite = 4.15 barns/electron
U=PEJuanite x rElectron Density= 13.09 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Juanite is Not Radioactive |
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Juanite Classification
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| Dana Class: |
78.07.06.01 (78)Unclassified silicates |
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(78.07)wholly unclassified silicates |
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(78.07.06)Dana Group |
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78.07.06.01 Juanite Ca10Mg4Al2Si11O39•4(H2O)(?) Unk Ortho |
| Strunz Class: |
09.HA.70 09 - SILICATES (Germanates) |
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09.H - Unclassified Silicates |
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09.HA -With alkali and alkali-earth Elements |
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09.HA.70 Juanite Ca10Mg4Al2Si11O39•4(H2O)(?) Unk Ortho |
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Other Juanite Information
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| 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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Print or Cut-and-Paste your Juanite Specimen Label here :
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Juanite
Ca10Mg4Al2Si11O39•4(H2O) (?)
Dana No: 78.07.06.01 Strunz No: 09.HA.70
Locality:
Notes:
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