Letovicite Mineral Data

General Letovicite Information

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 Synonym: ICSD 60058   PDF 35-100  

Letovicite Image

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Letovicite Crystallography

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: TriclinicSpace Group: P1,P 1 X Ray Diffraction: By Intensity(I/I_o): 4.95(1), 4.98(0.85), 3.77(0.8), Crystal Structure:

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Friese K , Aroyo M I , Schwalowsky I , Adiwidjaja G , Bismayer U , Journal of Solid State Chemistry , 165 (2002) p.136-147, The disordered high-temperature structure of (NH4)3H(SO4)2 and its relationship, to the room-temperature phase, Locality: synthetic, Sample: T = 293 K

 

Physical Properties of Letovicite

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

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 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

Electron Density: Bulk Density (Electron Density)=1.92 gm/cc
note: Specific Gravity of Letovicite =1.83 gm/cc.
Fermion Index: Fermion Index = 0.17
Boson Index = 0.83 Photoelectric: PE_Letovicite = 1.59 barns/electron
U=PE_Letovicite x rElectron Density= 3.07 barns/cc.
Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Letovicite is Not Radioactive  

Letovicite Classification

Dana Class: 28.01.03.01 (28)Anhydrous Acid and Sulfates   (28.01)(Anhydrous, Acid)   (28.01.03)Dana Group  

28.01.03.01 Letovicite (NH4)3H(SO4)2 P1,P 1 Tri

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  

07.AD.20 Letovicite (NH4)3H(SO4)2 P1,P 1 Tri

 

Other Letovicite Information

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
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