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Letovicite Mineral Data |
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Letovicite Mineral Data |
General Letovicite Information |
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 Chemical Formula: |
(NH4)3H(SO4)2 | ||
| Composition: |
Molecular Weight = 247.25 gm | ||
| Hydrogen 4.89 % H - % Calc as (NH4)2O | |||
| Hydrogen 0.41 % H 3.64 % H2O | |||
| Sulfur 25.94 % S 64.76 % SO3 | |||
| Nitrogen 16.99 % N 31.59 % (NH4)2O | |||
| Oxygen 51.77 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
(NH4)3H(SO4)2 | ||
| Environment: |
Formed during the burning of waste coal heaps. | ||
| IMA Status: |
Valid Species (Pre-IMA) 1932 | ||
| Locality: |
Letovice, Moravia, Czech Republic. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for the locality. | ||
| Name Pronunciation: |
Letovicite + Pronunciation  |
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| Synonym: |
ICSD 60058 | ||
| PDF 35-100 | |||
Letovicite Image | |||
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Images:
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Letovicite Crystallography |
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| Axial Ratios: |
a:b:c =0.5771:1:0.8131 | ||
| Cell Dimensions: |
a = 5.87, b = 10.17, c = 8.27, Z = 2; alpha = 101.1°, beta = 111.1°, gamma = 89.9° V = 451.98 Den(Calc)= 1.82 | ||
| Crystal System: |
Triclinic Space Group: P1,P 1 | ||
| X Ray Diffraction: |
By Intensity(I/Io): 4.95(1), 4.98(0.85), 3.77(0.8), | ||
Physical Properties of Letovicite |
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| Cleavage: |
{001} Distinct | ||
| Color: |
Colorless, White. | ||
| Density: |
1.83 | ||
| Diaphaneity: |
Transparent | ||
| Fracture: |
Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern. | ||
| Habit: |
Microscopic Crystals - Crystals visible only with microscopes. | ||
| Habit: |
Platy - Sheet forms (e.g. micas). | ||
| Habit: |
Pseudo Hexagonal - Crystals show a hexagonal outline. | ||
| Hardness: |
1-2 - Between Talc and Gypsum | ||
| Luster: |
Vitreous (Glassy) | ||
| Streak: |
white | ||
Optical Properties of Letovicite |
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| Gladstone-Dale: |
CI meas= -1.211 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= -1.223 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2824,KPDmeas= 0.2809,KC= 0.127 Ncalc = 1.23 |
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| Optical Data: |
Biaxial (-), a=1.501, b=1.516, g=1.525, bire=0.0240, 2V(Calc)=74, 2V(Meas)=75. | ||
Calculated Properties of Letovicite |
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| Electron Density: |
Bulk Density (Electron Density)=1.92 gm/cc note: Specific Gravity of Letovicite =1.83 gm/cc. |
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| Fermion Index: |
Fermion Index = 0.17 Boson Index = 0.83 |
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| Photoelectric: |
PELetovicite = 1.59 barns/electron U=PELetovicite x rElectron Density= 3.07 barns/cc. |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Letovicite is Not Radioactive |
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Letovicite Classification |
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| Dana Class: |
28.01.03.01 (28)Anhydrous Acid and Sulfates | ||
| (28.01)(Anhydrous, Acid) | |||
| (28.01.03)Dana Group | |||
| Strunz Class: |
07.AD.20 07 - SULFATES (SELENATES, TELLURATES) | ||
| 07.A - Sulfates (selenates, etc.) without Additional Anions, without H2O | |||
| 07.AD -With only large cations | |||
Other Letovicite Information |
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| References: |
NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | ||
| See Also: |
Links to other databases for Letovicite : 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 Letovicite using: Visit our Advertisers for Letovicite : Ask about Letovicite here : Print or Cut-and-Paste your Letovicite Specimen Label here :
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