Mascagnite Mineral Data + 
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- 28.2.1.1 Mascagnite (NH4)2SO4 P nma 2/m 2/m 2/m
- 28.2.1.2 Arcanite K2SO4 Pmcn 2/m 2/m 2/m
- VI/A.07-10 Thenardite Na2SO4 F ddd 2/m 2/m 2/m
- VI/A.07-20 Arcanite K2SO4 Pmcn 2/m 2/m 2/m
- VI/A.07-30 Mascagnite (NH4)2SO4 P nma 2/m 2/m 2/m
General Mascagnite Information |
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 Chemical Formula: |
(NH4)2SO4 | ||
| Composition: |
Molecular Weight = 132.14 gm | ||
| Hydrogen 6.10 % H - % Calc as (NH4)2O | |||
| Sulfur 24.27 % S 60.59 % SO3 | |||
| Nitrogen 21.20 % N 39.41 % (NH4)2O | |||
| Oxygen 48.43 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
(NH4)2(SO4) | ||
| Environment: |
Found in fumeroles. | ||
| IMA Status: |
Valid Species (Pre-IMA) 1779 | ||
| Locality: |
Vesuvius, Italy. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for Paolo Mascagni (1752-1815), Italian anatomist, University of Siena who first described the natural salt. | ||
| Synonym: |
ICSD 200905 | ||
| PDF 44-1413 | |||
Mascagnite Image | |||
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Images:
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Mascagnite Crystallography |
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| Axial Ratios: |
a:b:c =1.2985:1:1.7747 | ||
| Cell Dimensions: |
a = 7.782, b = 5.993, c = 10.636, Z = 4; V = 496.04 Den(Calc)= 1.77 | ||
| Crystal System: |
Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: P nma | ||
| X Ray Diffraction: |
By Intensity(I/Io): 4.33(1), 4.39(0.65), 3.06(0.55), | ||
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Crystal Structure:
Mouse |
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Physical Properties of Mascagnite |
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| Cleavage: |
[100] Good | ||
| Color: |
Colorless, Gray, Grayish yellow, Yellow, White. | ||
| Density: |
1.768 | ||
| Diaphaniety: |
Transparent to Opaque | ||
| Fracture: |
Sectile - Curved shavings or scrapings produced by a knife blade, (e.g. graphite). | ||
| Habit: |
Stalactitic - Shaped like pendant columns as stalactites or stalagmites (e.g. calcite). | ||
| Habit: |
Water Soluble - Water soluble mineral. | ||
| Hardness: |
2-2.5 - Gypsum-Finger Nail | ||
| Luster: |
Vitreous - Dull | ||
| Streak: |
white | ||
Optical Properties of Mascagnite |
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| Gladstone-Dale: |
CI meas= -1.771 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= -1.767 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2968,KPDmeas= 0.2971,KC= 0.1072 |
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| Optical Data: |
Biaxial (+), a=1.52, b=1.523, g=1.533, bire=0.0130, 2V(Calc)=58, 2V(Meas)=52.2. | ||
Calculated Properties of Mascagnite |
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| Electron Density: |
relectron=1.88 gm/cc |
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| Fermion Index |
Fermion Index = 0.21327 Boson Index = 0.78673 |
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| Photoelectric: |
PEMascagnite = 1.49 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Mascagnite is Not Radioactive |
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Mascagnite Classification |
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| Dana Class: |
28.2.1.1 (28)Anhydrous Acid and Sulfates | ||
| (28.2)(A+)2 XO4 | |||
| (28.2.1)Dana Group | |||
| Strunz Class: |
VI/A.07-30 VI - Sulfates,Chromates,Molybdates and Tungstates | ||
| VI/A - Waterfree sulfates [SO4]2- without unfamiliar anions. cations of very big size | |||
| VI/A.07 - Thenardite - Mascagnite series | |||
Other Mascagnite Information |
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| References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | ||
| See Also: |
Links to other databases for Mascagnite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 - WWW-MINCRYST 14 -École des Mines de Paris Search for Mascagnite using: Visit our Advertisers for Mascagnite : Translate Mascagnite Mineral Data : Ask about Mascagnite here : Print or Cut-and-Paste your Mascagnite Specimen Label here :
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