General Margarosanite Information Chemical Formula: |
Pb(Ca,Mn++)2Si3O9 |
Composition: |
Molecular Weight = 516.23 gm |
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Calcium 15.45 % Ca 21.62 % CaO |
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Manganese 0.85 % Mn 1.10 % MnO |
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Silicon 15.67 % Si 33.52 % SiO2 |
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Lead 40.14 % Pb 43.24 % PbO |
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Oxygen 27.89 % O |
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______ ______ |
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100.00 % 99.47 % = TOTAL OXIDE |
Empirical Formula: |
PbCa1.99Mn2+0.08Si2.88O9 |
Environment: |
In a metamorphosed stratiform zinc deposit. |
IMA Status: |
Valid Species (Pre-IMA) 1916 |
Locality: |
Franklin, Sussex Co., New Jersey, USA. Link to MinDat.org Location Data. |
Name Origin: |
Named from the Greek for "pearl" and "tablet", in reference to its luster and lamellar habit. |
Name Pronunciation: |
Margarosanite + Pronunciation |
Synonym: |
ICSD 18098 |
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PDF 27-79 |
| | Margarosanite Image
Images:
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Margarosanite Crystallography Axial Ratios: |
a:b:c =0.7068:1:0.7016 |
Cell Dimensions: |
a = 6.768, b = 9.575, c = 6.718, Z = 2; alpha = 110.36°, beta = 102.98°, gamma = 83.02° V = 394.78 Den(Calc)= 4.34 |
Crystal System: |
Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1 |
X Ray Diffraction: |
By Intensity(I/Io): 2.989(1), 3.034(0.91), 5.097(0.8), |
Crystal Structure:
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Mouse
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| Physical Properties of Margarosanite Cleavage: |
{???} Perfect, {???} Imperfect, {???} Imperfect |
Color: |
Colorless, Pearl white. |
Density: |
3.99 - 4.33, Average = 4.16 |
Diaphaneity: |
Transparent |
Habit: |
Cleaveable - Easily cleaved into fragments. |
Habit: |
Granular - Generally occurs as anhedral to subhedral crystals in matrix. |
Habit: |
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). |
Hardness: |
2.5-3 - Finger Nail-Calcite |
Luminescence: |
Fluorescent, Short UV=red sky blue, Long UV=red orange. |
Luster: |
Pearly |
Magnetism: |
Nonmagnetic |
Streak: |
white |
| Optical Properties of Margarosanite Gladstone-Dale: |
CI meas= -0.053 (Good) - where the CI = (1-KPDmeas/KC) |
CI calc= -0.014 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1772,KPDmeas= 0.184,KC= 0.1748 Ncalc = 1.7 - 1.76 Optical Data: |
Biaxial (-), a=1.727, b=1.771, g=1.798, bire=0.0710 |
| Calculated Properties of Margarosanite Electron Density: |
Bulk Density (Electron Density)=3.95 gm/cc |
note: Specific Gravity of Margarosanite =4.32 gm/cc. Fermion Index: |
Fermion Index = 0.09 |
Boson Index = 0.91 Photoelectric: |
PEMargarosanite = 676.49 barns/electron |
U=PEMargarosanite x rElectron Density=2,673.40 barns/cc. Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Margarosanite is Not Radioactive | Margarosanite Classification Dana Class: |
59.01.02.02 (59)Cyclosilicate Three-Membered Rings |
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(59.01)anhydrous, no other anions |
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(59.01.02)Walstromite group |
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Strunz Class: |
09.CA.25 09 - SILICATES (Germanates) |
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09.C - Cyclosilicates |
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09.CA -[Si3O9]6- 3-membered single rings (dreier-Einfachringe), |
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| Other Margarosanite Information References: |
NAME( AntBidBlaNic2) PHYS. PROP.(Collectors Book of Fluorescent Minerals) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
See Also: |
Links to other databases for Margarosanite : |
1 - Am. Min. Crystal Structure Database 2 - Athena 3 - EUROmin Project 4 - Ecole des Mines de Paris 5 - Franklin Minerals(Dunn) 6 - Franklin Minerals(Palache) 7 - GeoScienceWorld 8 - Google Images 9 - Google Scholar 10 - Handbook of Mineralogy (MinSocAm) 11 - Handbook of Mineralogy (UofA) 12 - MinDAT 13 - Mineralienatlas (Deutsch) 14 - Online Mineral Museum 15 - QUT Mineral Atlas 16 - Ruff.Info 17 - WWW-MINCRYST Search for Margarosanite using: Visit our Advertisers for Margarosanite : A Bijoux Google Search for MargarosaniteAdam's Minerals Google Search for Margarosanite Cape Minerals Google Search for Margarosanite Dakota Matrix Minerals Google Search for Margarosanite Excalibur Mineral Corp. Google Search for Margarosanite Exceptional Minerals Google Search for Margarosanite John Betts Fine Minerals Search for Margarosanite McDougall Minerals Google Search for Margarosanite Mineral News Website Link Rock and Mineral Shows Google Search for Margarosanite Weinrich Minerals, Inc. Google Search for Margarosanite Ask about Margarosanite here : Print or Cut-and-Paste your Margarosanite Specimen Label here :
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