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Letovicite

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Formula:
(NH4)3H(SO4)2
System:
Triclinic
Colour:
Colourless, white; ...
Hardness:
1 - 2
Name:
After the type locality, Letovice (Lettowitz), Moravia, Czech Republic.
This species was described and named based on an anthropogenic origin (burning coal mine dumps) but has since been identified in nature.

Classification of Letovicite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
7.AD.20

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
A : Sulfates (selenates, etc.) without additional anions, without H2O
D : With only large cations
28.1.3.1

28 : ANHYDROUS ACID AND NORMAL SULFATES
1 : Anhydrous Acid Sulfates
25.1.9

25 : Sulphates
1 : Sulphates of the alkali metals and ammonium
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Type Occurrence of Letovicite

Year of Discovery:
1932
Geological Setting of Type Material:
Burning coal mine waste heaps.
Associated Minerals at Type Locality:

Physical Properties of Letovicite

Diaphaneity (Transparency):
Transparent
Colour:
Colourless, white; colourless in transmitted light
Hardness (Mohs):
1 - 2
Cleavage:
Distinct/Good
On {001}.
Fracture:
Irregular/Uneven
Density:
1.83 g/cm3 (Measured)    

Crystallography of Letovicite

Crystal System:
Triclinic
Cell Parameters:
a = 5.87Å, b = 10.17Å, c = 8.27Å
α = 101.1°, β = 111.1°, γ = 89.9°
Ratio:
a:b:c = 0.577 : 1 : 0.813
Morphology:
Tiny pseudo-hexagonal plates on {001}. Granular massive.
Twinning:
Lamellar, common.

Optical Data of Letovicite

Type:
Biaxial (-)
RI values:
nα = 1.501 nβ = 1.516 nγ = 1.525
2V:
Measured: 75° , Calculated: 74°
Max Birefringence:
δ = 0.024
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
relatively strong

Chemical Properties of Letovicite

Formula:
(NH4)3H(SO4)2
Essential elements:
All elements listed in formula:

Relationship of Letovicite to other Species

7.AD.05ArcaniteK2SO4
7.AD.05Mascagnite(NH4)2SO4
7.AD.10MercalliteKHSO4
7.AD.15MiseniteK8H6(SO4)7
7.AD.25GlauberiteNa2Ca(SO4)2
7.AD.30AnhydriteCaSO4
7.AD.35AnglesitePbSO4
7.AD.35BaryteBaSO4
7.AD.35CelestineSrSO4
7.AD.35OlsacheritePb2(SeO4)(SO4)
7.AD.40KalistrontiteK2Sr(SO4)2
7.AD.40Palmierite(K,Na)2Pb(SO4)2
25.1.1ThénarditeNa2SO4
25.1.2MatteucciteNaHSO4 · H2O
25.1.3MirabiliteNa2SO4 · 10H2O
25.1.4ArcaniteK2SO4
25.1.5MercalliteKHSO4
25.1.6MiseniteK8H6(SO4)7
25.1.7Aphthitalite(K,Na)3Na(SO4)2
25.1.8Mascagnite(NH4)2SO4
25.1.10Ammonioalunite(NH4)Al3(SO4)2(OH)6

Other Names for Letovicite

Name in Other Languages:
German:Letovicit
Spanish:Letovicita

Other Information

Other Information:
Readily soluble in water. Volatile.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Letovicite

Reference List:
Marignac (1857) Annales des mines: 12: 523 (artificial crystals).

Wyrouboff (1880) Bulletin de la Société française de Minéralogie: 3: 209 (artificial crystals).

Gossner (1903) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 38: 158.

Groth, P. (1908) Chemische Krystallographie. Leipzig. 5 volumes: vol. 2: 317 (artificial).

Sekanina (1932) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 83: 117.

American Mineralogist (1933): 18: 180.

Rost (1937) Ak. Česká Roz.: 47(11).

Rost (1938) Neues Jahrbuch für Mineralogie, Geologie und Paleontologie, Heidelberg, Stuttgart: I: 360.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged: 397.

American Mineralogist (1985): 70: 1334.

Acta Crystallographica: B41: 209-213.

Journal of Applied Crystallography (1984): 17: 331-333.

Internet Links for Letovicite

Localities for Letovicite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Austria
 
  • Styria
    • Leoben
Meixner, H. (1954): Neue Mineralfunde in den österreichischen Ostalpen XIII.- Carinthia II, 144./64., 18-29.
Czech Republic
 
  • Bohemia (Böhmen; Boehmen)
    • Central Bohemia Region
Zacek, V., Oplustil, S., Mayova, A. & Meyer, F. R. (1995): Die Mineralien von Kladno in Mittelböhmen, Tschechische Republik. Mineralien-Welt 6 (1), 13-30 (in German).
    • Hradec Králové Region
      • Trutnov (Trautenau)
        • Radvanice
Žáček, V., Ondruš, P.: Mineralogy of recently formed sublimates from Kateřina colliery in Radvanice, Eastern Bohemia, Czech Republic. Bulletin of the Czech geological survey, 1998, vol. 73, no. 2, s. 289-302.
  • Moravia (Mähren; Maehren)
    • South Moravia Region
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 397.
Zeitschr.Krist.(1932) 83, 117-122
Germany
 
  • North Rhine-Westphalia
    • Aachen
      • Alsdorf
Blaß, G. and Strehler, H. (1993): Mineralbildungen in einer durch Selbstentzündung brennenden Bergehalde des Aachener Steinkohlenreviers. Mineralien-Welt 4 (4), 35-42. (in German)
  • Saxony
    • Dresden
      • Freital
T. Witzke (1995): Neufunde aus Sachsen (IV): Neue Nachweise der seltenen Minerale Chernikovit, Ktenasit, Letovicit, Ramsbeckit, Ravatit und Znucalit. - Lapis 20, 9, 35-36
Hungary
 
  • Baranya Co.
    • Mecsek Mts
      • Pécs
SZAKÁLL, S. & KRISTÁLY, F. (2008) Ammonium sulphates from burning coal dumps at Komló and Pécs-Vasas, Mecsek Mts., South Hungary. Mineralogia. Special Papers 32,
  • Borsod-Abaúj-Zemplén Co.
    • Borsodi Mts
Poland
 
  • Upper Silesia (Śląskie)
    • Upper Silesian Coal Basin
      • Rybnik Coal Area
        • Rybnik
Łukasz Kruszewski (2012) Unique chloride assemblage of exhalative origin from burning coal-mining dump in Radlin (Rybnik Coal Area, S Poland). Mineralogical Society of Poland Special Papers 40
South Africa
 
  • Free State Province
    • Fezile Dabi District
International Journal of Coal Geology 72 (2007) 124–140
  • Mpumalanga Province
    • Nkangala District
      • Witbank
International Journal of Coal Geology 72 (2007) 124–140
Tajikistan
 
  • Viloyati Sogd (Viloyati Sughd; Viloyati Khodzhent; Viloyati Leninabad)
    • Zeravshan Range
      • Yagnob River
D.I.Belakovskiy data
Belakovski D.I.. Die Mineralien der brennenden Kohlefloze von Ravat in Tadshikistan, Lapis, 1990, N 12 p.21-26. (in German)
USA
 
  • California
    • Sonoma Co.
      • Mayacmas Mts (Mayacamas Mts)
        • West Mayacmas District
Vonsen, Magnus (1941) Preliminary report on minerals of The Geysers of Sonoma County, California. Mineralogist: 9: 246, 279; Vonsen, Magnus (1946), Minerals at “The Geysers,” Sonoma County, California: California Division Mines Report 42: 288; Dunning, Gail E. and J.F. Cooper (1969a) Letovicite from The Geysers, Sonoma County, California. California Division Mines and Geology Mineral Information Service: 22: 135; Dunning, G. S. & Cooper, J. F. (1993): History and minerals of The Geysers Sonoma County, California. Mineralogical Record 24(5): 339-352.
  • Oklahoma
    • Okmulgee Co.
Rocks & Minerals: 72(4): 252-264.
Mineral and/or Locality  
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