[en] Hoernesite (Mg₃(AsO₄)₂·8H₂O) is a supergene arsenate belonging to the vivianite group. It is a relatively rare mineral in the world and in this work it is the first description of Hoernesite from Dobsina. In Slovakia, a new occurrence of aggregates of Hoernesite with the formula (Mg1,968Ni0,749Co0,423) 3,146 (As1,834Si0,013) 1,852·8H₂O with lattice parameters a = 10.2172 AA was described; b = 13.4079 AA; c = 4.7476 AA; AA = 105.2; V = 627.721AA³. It was investigated by powder X-ray diffractometry and electron microanalysis (EMPA - WDS). The sample being studied is interesting, but further research using spectroscopic methods is needed. (authors)

[en] Radial aggregates of epidote I. were found near the old Jewish cemetery between Strma cesta street and Zizkova street, behind demolished settlement of Zuckermandel. Aggregates of radially arranged epidote crystals had dimensions of 8.5 x 9.5 x 2.2 cm. The crystals have only weak chemical zoning, with the older parts poorer in Fe"3"+ than younger part which is richer in Fe"3"+. Another rare genetic type of epidote II. with higher content of Fe"3"+ than radial epidote, had also been found on the same locality. Unite-cell parameters of radial epidote I. (a = 8,8474 (8) A, b = 5,6006 (6) AA, c = 10,0939 (9) AA, ft = 115,47 grad (8), V= 451,56 (8) AA"3) are smaller than the parameters of epidote II. (a = 8,8697 (5) AA, b = 5,6155 (4) AA, c = 10,1313 (6) AA, β = 115,33 grad (6 ), V= 456,15 (6) AA"3). Samples of epidotes crystallized in different genetic conditions and possible in other time periods. (authors)

[en] On this poster important geological sites in Slovak Republic are presented. Geological sites are listed according to geological origin: (1) Mesozoic; (2) Geomorphology and engineering geology; (3) Mineral mining and history of mining; (4) Quaternary sites; (5) Paleogene and Neogene; (6) Hydrogeology; (7) Neovolcanites; (8) Older and younger Paleozoic, Mesozoic metamorphic, Veporicum; (9) Magmatic. This map contains 451 sites, which are by nature divided into 11 categories, many sites can be classified into several categories.

[en] Up to date, 21 new minerals have been described from 14 Slovak deposits. Another 39 minerals have provided invaluable information on the scientific knowledge and diversity of individual minerals on Earth. On the territory of Slovakia, the world's most famous locality of occurrence is mainly euchroite, scainiite, hodrushite, kobellite, mrazekite, schafarzikite, vihorlatite, skinnerite, telluronevskite and brandholzite. On a European scale, examples are precious opal from Dubnik, sernarmontite from Pernek and kermesite from Pezinok. While preserving the mineral heritage, it is important to preserve, in particular, the type and rare minerals, especially in large national museums and collections, and to deposit other cotype material into other (and private) collections in order to preserve them for future generations in unforeseen circumstances (authors)

[en] On April 3, 2012 a single piece of a meteorite was found in the forest near Smolenice (Trnava County, Slovakia). The latitude and longitude of the find are 48 grad 31.2 'N and 17 grad 23.9 'E, respectively. The meteorite was slightly weathered (weathering grade W1) and its total mass was 13.95 kg. The bulk chemical composition is dominated by iron (88.7 wt %) and nickel (8.10 wt %). This, along with concentration of Ga (1.80 μg/g), Ge (< 0.7μg/g), and Ir (1.67 μg/g), suggest the meteorite being a IVA iron. Based on lamellae width of kamacite (average of 0.22 mm), the meteorite can be classified as fine octahedrite (Of). The mineralogy is very simple, the main minerals are iron (kamacite) (5.16 - 7.36 wt. % Ni) and taenite (16.73 - 33.93 wt. % Ni), with rare troilite nodules and daubreelite inclusions and thin veinlets. The meteorite shows Widmanstatten patterns and plessite structure is locally present. Analyses of cosmogenic radionuclides (²⁶Al, ¹⁴C, and ⁴⁰K) indicate that the radius of the Smolenice meteorite could be in the range of 30.50 cm, its terrestrial age of about 0.1 Ma and its cosmic-ray exposure age of about 0.2 Ma. (authors)

[en] A single 13.95 kg mass of a slightly weathered iron meteorite was found in the forest near Smolenice (48 grad 31.2'N, 17 grad 23.9'E; Trnava County, Slovakia). The bulk chemical composition (in wt. %) is: Fe 88.78, Ni 8.16, Co 0.38, P 0.05, S<0.006 and (in μg/g): Ge<0.18, Ir 1.67, Ga 1.80, Cr 87.3, Cu 135.1, As 4.52, Mo 5.82, Sn 1.53, W 0.56, Re 0.18, Ru 3.56, Rh 0.90, Pd 4.12, Pt 5.35, Au 1.19, Zn<5, B<0.68, Pb<0.06. Bulk geochemistry, and Ni, Ga, Ge and Ir contents in particular suggest that the meteorite is an octahedrite belonging to the IVA group. The average thickness of kamacite lamellae is 0.22 mm, ranking it as fine octahedrite (Of). The mineral composition is simple, the most abundant minerals being iron (kamacite) (5.16-7.36 wt. % Ni) followed by taenite (16.73-33.93 wt. % Ni). Troilite nodules and daubreelite inclusions and thin veinlets are rare. The Widmanstaetten pattern is uniform across the meteorite and plessite structure is developed locally. Analyses of cosmogenic radionuclides (¹⁴C and ²⁶Al) indicate that the radius of the Smolenice meteorite could be 30±10 cm and its terrestrial age 11±2 kyr. (authors)