Mineralogy Database

Letovicite Mineral Data

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General Letovicite Information

Help on Chemical  Formula: Chemical Formula: (NH4)3H(SO4)2
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: (NH4)3H(SO4)2
Help on Environment: Environment: Formed during the burning of waste coal heaps.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1932
Help on Locality: Locality: Letovice, Moravia, Czech Republic. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Letovicite + Pronunciation Say LETOVICITE
Help on Synonym: Synonym: ICSD 60058
  PDF 35-100

Letovicite Image

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Comments: Pearly opaque white crystalline letovicite on matrix.
Location: Kladno, Stredocesky, Czech Republic. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Letovicite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5771:1:0.8131
Help on Cell Dimensions: 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
Help on Crystal System: Crystal System: Triclinic Space Group: P1,P 1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 4.95(1), 4.98(0.85), 3.77(0.8),

Physical Properties of Letovicite

Help on Cleavage: Cleavage: {001} Distinct
Help on Color: Color: Colorless, White.
Help on Density: Density: 1.83
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Habit: Habit: Pseudo Hexagonal - Crystals show a hexagonal outline.
Help on Hardness: Hardness: 1-2 - Between Talc and Gypsum
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Letovicite

Help on Gladstone-Dale: 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
Help on Optical Data: 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

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

Letovicite Classification

Help on  Dana Class: Dana Class: (28)Anhydrous Acid and Sulfates
  (28.01)(Anhydrous, Acid)
  (28.01.03)Dana Group Letovicite (NH4)3H(SO4)2 P1,P 1 Tri
Help on  Strunz Class: 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

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: 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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Dana No: Strunz No: 07.AD.20





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