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Montroyalite Mineral Data
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General Montroyalite Information
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 Chemical Formula: |
Sr4Al8(CO3)3(OH,F)26•10-11(H2O) |
| Composition: |
Molecular Weight = 1,384.60 gm |
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Strontium 25.31 % Sr 29.93 % SrO |
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Aluminum 15.59 % Al 29.46 % Al2O3 |
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Hydrogen 2.48 % H 22.12 % H2O |
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Carbon 2.60 % C 9.54 % CO2 |
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Oxygen 37.55 % O |
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Fluorine 16.47 % F 16.47 % F |
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- %
F -6.93 % -O=F2 |
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______ ______ |
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100.00 % 100.58 % = TOTAL OXIDE |
| Empirical Formula: |
Sr4Al8(CO3)3(OH)13F12•10.5(H2O) |
| Environment: |
Cavities in a silicocarbonate sill. |
| IMA Status: |
Approved IMA 1986 |
| Locality: |
Francon quarry, Montreal Island, Montreal, Quebec, Canada. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Monteregian Hill, Mont Royal, prominent landmark in Montreal, Canada, from which the city�s name was derived. |
| Name Pronunciation: |
Montroyalite + Pronunciation  |
| Synonym: |
IMA1985-001 |
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Montroyalite Image |
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Images:
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Montroyalite Crystallography
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| Crystal System: |
Triclinic Space Group: Unk. |
| X Ray Diffraction: |
By Intensity(I/Io): 6.57(1), 3.283(0.55), 4(0.5), |
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Physical Properties of Montroyalite
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| Cleavage: |
None |
| Color: |
White. |
| Density: |
2.667 |
| Diaphaneity: |
Translucent |
| Fracture: |
Brittle - Splintery - Brittle fracture leaving splintery fragments. |
| Habit: |
Fibrous - Crystals made up of fibers. |
| Hardness: |
3.5 - Copper Penny |
| Luster: |
Waxy |
| Streak: |
white |
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Optical Properties of Montroyalite
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| Optical Data: |
Biaxial (-), a=1.515, b=1.53, g=1.545, bire=0.0300, 2V(Calc)=88, 2V(Meas)=80-89. |
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Calculated Properties of Montroyalite
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| Electron Density: |
Bulk Density (Electron Density)=2.60 gm/cc
note: Specific Gravity of Montroyalite =2.67 gm/cc.
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| Fermion Index: |
Fermion Index = 0.01
Boson Index = 0.99 |
| Photoelectric: |
PEMontroyalite = 28.03 barns/electron
U=PEMontroyalite x rElectron Density= 73.01 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Montroyalite is Not Radioactive |
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Montroyalite Classification
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| Dana Class: |
16b.05.03.01 (16b)Carbonates - Hydroxyl or Halogen |
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(16b.05)with miscellaneous formulae |
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(16b.05.03)Dana Group |
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16b.05.03.01 Montroyalite Sr4Al8(CO3)3(OH,F)26•10-11(H2O) Unk. Tri |
| Strunz Class: |
05.DB.35 05 - CARBONATES (NITRATES) |
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05.D - Carbonates with Additional Anions, with H2O |
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05.DB -With large and medium-sized cations |
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05.DB.35 Montroyalite Sr4Al8(CO3)3(OH,F)26•10-11(H2O) Unk. Tri |
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Other Montroyalite Information
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| References: |
NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
| See Also: |
Links to other databases for Montroyalite :
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 Montroyalite Specimen Label here :
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Montroyalite
Sr4Al8(CO3)3(OH,F)26•10-11(H2O)
Dana No: 16b.05.03.01 Strunz No: 05.DB.35
Locality:
Notes:
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