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Loučná, Ostrov, Karlovy Vary District, Karlovy Vary Region, Czech Republici
Regional Level Types
Loučná- not defined -
Karlovy Vary DistrictDistrict
Karlovy Vary RegionRegion
Czech RepublicCountry

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Latitude & Longitude (WGS84):
50° 24' 59'' North , 12° 58' 49'' East
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
Kurort Oberwiesenthal2,592 (2016)0.9km
Boží Dar244 (2018)4.0km
Kovářská1,320 (2018)5.7km
Jáchymov3,143 (2018)7.2km
Krásný Les180 (2018)8.1km
Name(s) in local language(s):
Karlovarský Kraj

Surrounding of locality is composed of relicts of denuded tertiary vulcanites in mica schists of the Klínovec series. Loučná body is petrographically mostly nephelinite and its differenciates (olivinic, glassy, sodalitic, leucitic and doleritic nephelinites). Phenocrysts are pyroxenes (augite, titanaugite and aegirinaugite), biotite, titanite, perovskite, apatite and rarely melanite. Mineralogically interesting are vein rocks of phonolite composition with large pseudomophs after leucite. Those are often 3 to 10 cm large, composed of white of yellowish mass of approximately 80 % K-feldspar (sanidine or adulare) and 20 % illite.

Due to building jobs in village, are there some time-limited outcrops, where the various varietes of nephelinite are exposed. In xenolites biotite, pyrite and carbonates occure. Nephelinites contain somewhere small vugs with crystals of analcime and rarely natrolite.

Pseudoleucite: a pseudomorph after leucite consisting of a mixture of nepheline, orthoclase, and analcime likes as fine feldspar crystals and nice specimens from classic locality.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

7 valid minerals.

Detailed Mineral List:

Formula: Na(AlSi2O6) · H2O
Habit: trapezohedrons
Colour: white
Description: clear to milky white trapezohedron crystals in almond-shaped vugs. The biggest crystals have 10 mm
Reference: Roman Gramblička
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Habit: pseudohexagonal tabular and sheet crystals
Colour: dark brown to black
Description: mica´s sheets to 20 mm are common in xenolites and some types of volcanic rock
Reference: Roman Gramblička
Formula: CaCO3
Habit: prismatic
Colour: colorless, white
Description: small prismatic crystals to 4mm, found in vugs with analcime, as small rhombs in pale xenolites
Reference: Roman Gramblička
Formula: CaMg(CO3)2
Colour: white to tan
Description: grains, aggregates and rhombic crystals to 3mm in xenolites
Reference: Roman Gramblička
'Feldspar Group'
Reference: Martins da Pedra.
Formula: K(AlSi2O6)
Reference: Pauliš, P.: Nejzajímavější mineralogická naleziště Čech II. Kutná Hora: Kuttna, 2003, s. 17 - 18.
Formula: Na2Al2Si3O10 · 2H2O
Habit: prismatic
Colour: white
Description: small prismatic crystals, max 3x1mm, found in one vug with analcime
Reference: Roman Gramblička
Formula: CaTiO3
Reference: No reference listed
Reference: Pivec, E. and ULrych, J. 1982. Pseudoleucite from Loucná (Oberwiesenthal), Krusné, Hory Mtns. (Erzgebirge), Czechosolovakia. Neues Jb. Min. Mh. 1982, 227-236.
Formula: FeS2
Habit: cubes to pentagondodecahedrons, grains
Colour: light yellow
Description: common in pale xenolites, as inclusions, grains, crystals (to 2mm) and their clusters, together with carbonates and feldspars
Reference: Roman Gramblička

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Group 4 - Oxides and Hydroxides
Group 5 - Nitrates and Carbonates
Group 9 - Silicates
Analcime9.GB.05Na(AlSi2O6) · H2O
Natrolite9.GA.05Na2Al2Si3O10 · 2H2O
Unclassified Minerals, Rocks, etc.
'Feldspar Group'-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 1:2
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework Feldspathoids and related species
Group 77 - TECTOSILICATES Zeolites
Zeolite group - True zeolites
Analcime77.1.1.1Na(AlSi2O6) · H2O
Natrolite77.1.5.1Na2Al2Si3O10 · 2H2O
Unclassified Minerals, Mixtures, etc.
'Feldspar Group'-

List of minerals for each chemical element

H AnalcimeNa(AlSi2O6) · H2O
H NatroliteNa2Al2Si3O10 · 2H2O
H BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
C DolomiteCaMg(CO3)2
C CalciteCaCO3
O PerovskiteCaTiO3
O LeuciteK(AlSi2O6)
O DolomiteCaMg(CO3)2
O AnalcimeNa(AlSi2O6) · H2O
O NatroliteNa2Al2Si3O10 · 2H2O
O BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
O CalciteCaCO3
F BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Na AnalcimeNa(AlSi2O6) · H2O
Na NatroliteNa2Al2Si3O10 · 2H2O
Mg DolomiteCaMg(CO3)2
Mg BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Al LeuciteK(AlSi2O6)
Al AnalcimeNa(AlSi2O6) · H2O
Al NatroliteNa2Al2Si3O10 · 2H2O
Al BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Si LeuciteK(AlSi2O6)
Si AnalcimeNa(AlSi2O6) · H2O
Si NatroliteNa2Al2Si3O10 · 2H2O
Si BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
S PyriteFeS2
K LeuciteK(AlSi2O6)
K BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Ca PerovskiteCaTiO3
Ca DolomiteCaMg(CO3)2
Ca CalciteCaCO3
Ti PerovskiteCaTiO3
Fe BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Fe PyriteFeS2


Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Pivec, E., Ulrych, J., Langrová, A., (2004). On the origin of pseudoleucite from Cenozoic phonolite dyke from Loučná/Böhmisch Oberwiesenthal, Krušné hory/Erzgebirge Mts., Bohemia. Neues Jahrbuch für Mineralogie. Abhandlungen 179, 221–238.
Cornelis Klein, Cornelius S. Hurlbut, Jr. (2008). "Manual de Mineralogía" (Dana´s reference book based), Vol. 2, fourth edition, Editorial Reverté, México.(Pseudoleucite) pp. 603-604.

Other Regions, Features and Areas containing this locality

Czech Republic
Eurasian PlateTectonic Plate

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