Bačík P., Fridrichová J., Uher P., Rybár S., Luptáková J., Pukančík L., Vrábliková D., Vaculovič T., 2019: Octahedral substitution in beryl from weakly fractionated intragranitic pegmatite Predné Solisko, Tatry Mountains (Slovakia): the indicator of genetic conditions. Journal of Geosciences, 64, 59-72 

Fridrichová J., Bačík P., Ertl A., Wildner M., Miglierini M., 2018: Crystal chemistry and Jahn-Teller distortion of Mn3+-occupied octahedra in red beryl from Utah. Journal of Molecular Structure, 1152, 79-86

Fridrichová J., Bačík P., Illášová Ľ., Kozáková P., Škoda R., Pulišová Z., Fiala A., 2016: Raman and optical spectroscopic investigation of gem-quality smoky quartz. Vibrational Spectroscopy, 85, 71-78

Fridrichová J., Bačík P., Bizovská V., Libowitzky E., Škoda R., Uher P., Ozdín D., Števko M., 2016: Spectroscopic and bond-topological investigation of interstitial volatiles in beryl from Slovakia. Physics and Chemistry Minerals, 43, 419-437

Fridrichová J., Bačík P., Rusinová P., Antal P., Škoda R., Bizovská V., Miglierini M., 2015: Optical and crystal-chemical changes in aquamarines and yellow beryls from Thanh Hoa province, Vietnam induced by heat treatment. Physics and Chemistry Minerals, 42, 287-302.

Bačík P., Fridrichová J., Rybnikova O., Štubňa J., Illášová Ľ., Škoda R., Vaculovič T., Pulišová Z., Sečkár P., 2023: Crystal-Chemical and Spectroscopic Study of Gem Sphalerite from Banská Štiavnica, Slovakia. Minerals, 13(1), 109

Bačík P., Fridrichová J., Bancík T., Štubňa J., Illášová Ľ, Pálková H., Škoda R., Vaculovič T., Sečkár P., 2020: The REE-induced absorption and luminescence in yellow hydroxylapatite from Muránska Dlhá Lúka, Slovakia. Minerals, 10(11), 100

Fridrichová J., Bačík P., Štubňa J., Illášová Ľ., 2020: Sphalerite from Slovakia. The Journal of Gemmology, 37, 12-13

Bačík P., Fridrichová J., 2019: Assessment of the site occupancy in beryl based on bond-length constraints. Minerals, 9(10), 641

Rybnikova O., Bačík P., Uher P., Fridrichová J., Lalinská-Voleková B., Kubernátová M., Hanus R., 2023: Characterization of chrysoberyl and its gemmological varieties by Raman spectroscopy. Journal of Raman Spectroscopy, 57, 857-870.

Bačík P., Miyawaki R., Atencio D., Cámara F., Fridrichová J., 2017: Nomenclature of gadolinite supergroup. European Journal of Mineralogy, 29, 1067-1082 [o1] 2019 Hawthorne, F.C. - Uvarova, Y.A. - Sokolova, E.: Mineralogical Magazine, Vol. 83, No. 1, 2019, s. 3-54 - SCI ; SCOPUS

Fridrichová J., Bačík P., Ertl A., Wildner M., Miglierini M., 2018: Crystal chemistry and Jahn-Teller distortion of Mn3+-occupied octahedra in red beryl from Utah. Journal of Molecular Structure, 1152, 79-86 [o1] 2019 Taran, M.N. - Vyshnevskyi, O.A.: Physics and Chemistry of Minerals, Vol. 46, No. 8, 2019, s. 795-806 - SCOPUS

Fridrichová J., Bačík P., Illášová Ľ., Kozáková P., Škoda R., Pulišová Z., Fiala A., 2016: Raman and optical spectroscopic investigation of gem-quality smoky quartz. Vibrational Spectroscopy, 85, 71-78 [o1] 2017 Yin, Z. - Jiang, C. - Chen, M. - Lu, F. - Chen, Q.: Gondwana Research, Vol. 44, April, 2017, s. 228-235 - SCOPUS

Fridrichová J., Bačík P., Bizovská V., Libowitzky E., Škoda R., Uher P., Ozdín D., Števko M., 2016: Spectroscopic and bond-topological investigation of interstitial volatiles in beryl from Slovakia. Physics and Chemistry Minerals, 43, 419-437 [o1] 2017 Jehlička, J. - Culka, A. - Bersani, D. - Vandenabeele, P.: Journal of Raman Spectroscopy, Vol. 48, No. 10, 2017, s. 1289-1299 - SCOPUS

Fridrichová J., Bačík P., Rusinová P., Antal P., Škoda R., Bizovská V., Miglierini M., 2015: Optical and crystal-chemical changes in aquamarines and yellow beryls from Thanh Hoa province, Vietnam induced by heat treatment. Physics and Chemistry Minerals, 42, 287-302. [o1] 2019 Andersson, L.O.: Canadian Mineralogist, Vol. 57, No. 4, 2019, s. 551-566 - SCI ; SCOPUS

APVV-18-0065 (2019-2023 - investigator; principal investigator doc. Peter Bačík) Light litophile elements (Li, Be, B) in selected minerals: from crystal structure to geological processes. The project includes mineralogical and crystal-chemical studies of minerals that contain light cations from the second period of the periodic system - lithium, beryllium and boron in their structure. Research is focused on two areas and two types of minerals will be examined. The first area of research will focus on crystal-chemical patterns down to the subatomic level using state-of-the-art analytical methods. The second area will be focused on the behaviour of these elements in the mineral and rock environment. Firstly, minerals containing Be, B and Li directly in their crystal-chemical formula (these elements are dominant at least at one structural site) will be studied. These include silicates (tourmaline supergroup, gadolinite supergroup, beryl and cordierite, Li mica, spodumen, bertrandite, phenakite), borates (whole class), phosphates (herderite) and oxides (chrysoberyl). However, we will focus also on the minerals in which Be, B and Li substitute for the other cations, but are not dominant. In this context, the distribution of studied elements in various minerals in variable rock environments will be studied.

VEGA 1/0137/20 (2020-2023 - investigator; principal investigator doc. Peter Bačík- Experimental study of physico-chemical properties of selected minerals (oxides, phosphates and silicates). The experimental mineralogical approach is suitable for detailed crystal-chemical study of properties and processes within the crystal structure and its stability, but also for the precious stones treatment within the gemmology. Some of these experiments are not sufficiently described and the colour changing mechanisms are similarly not clearly known as well as the processes leading to the mineral structure breakdown. The crystal-chemical properties of selected minerals (oxides, phosphates and silicates) will be studied by thermal, thermal-pressure and radiation experiments, especially the oxidation or reduction of cations, the formation or disappearance of colour centres and structural defects. The mineral decomposition processes and new phase formation will also be studied under experimental conditions.

VEGA-1/0151/19 (2019-2021, investigator; principal investigator Prof. Dr. Marián Putiš) Petrology and geochronology of crustal and mantle dyke systems in Cretaceous accretionary wedge of the Western Carpathians and eastern Austroalpine margin”. Cretaceous accretionary wedges of the Western Carpathians and the Austro-Alpine unit of the eastern Alps contains dykes of the crustal and mantle rocks. These rocks are significant indicator of Permian-Triassic or Jurassic-Cretaceous extension and the opening of the Neotethys and Atlantic Tethys respectively. They are of the key importance for the reconstruction of palaeotectonic and geodynamic evolution of the Carpathians and Alps. The mineral rock composition (EPMA, LA-ICP-MS) and their whole-rock chemistry (ICP-MS) will be used for definition of their palaeotectonic origin. The isotopic study (Rb/Sr, Lu/Hf, Sm/Nd. U/Pb) of the rocks and minerals, and their isotopic dating (U-Pb SIMS, nano-SIMS, LA-MC-ICP-MS, K-Ar) will enhance creation of geodynamic evolution model of mentioned accretionary complexes. Their occasional economic potential can be estimated. We will utilize possibilities of our broad international co-operation particularly in isotope geochronology.

VEGA 1/0189/23 (2023-2025, investigator; principal investigator P. Bačík)

Experimental research of minerals is suitable for a detailed crystal-chemical study of properties and processes within the structure and its stability, but also for the modification of the gemstone properties in gemmology. The aim of this project is a detailed crystal-chemical description of experiments, the mechanism causing the colour change, or the processes leading to the decomposition of the mineral structure. Crystal-chemical processes in selected minerals (oxides, phosphates and silicates) will be studied using thermal, radiation and biomineralogical experiments. In the experimental biomineralogical research of the REE phosphates and silicates stability, their interaction with the biosphere, i.e., fungi, will be studied. Standard mineralogical methods will be used for the study, especially electron microanalysis, X-ray diffraction analysis, HRTEM, LA-ICP-MS, but also a wide range of spectroscopic methods such as infrared absorption, Raman, optical absorption and Mössbauer spectroscopy

09I03-03-V04-00060 TheoCrystMin (2024-2026, investigator; principal investigator P. Bačík)The main goal of the project is to create a robust theoretical basis for the description of structural properties and crystal-chemical properties and processes in minerals. Minerals, unlike synthetic materials, are almost always solid solutions of two or more end-member compositions. Theoretical mineralogical study is based on several different approaches, but in mineral crystallography, the most promising is a combination of structural and bond topology and bond-valence theory. This approach enables the prediction and analysis of bonding properties in different mineral structures and the determination of the substitution effects on the local structure as well as over a longer distance. Moreover, in conjunction with other approaches, such as ligand field theory, it could improve the interpretation and prediction of spectroscopic properties of minerals. Therefore, a wide range of analytical methods will be applied to verify theoretical predictions. The research will focus in detail on specific problems in various oxide minerals (silicates, oxides, phosphates), but also on the development of functional theory and software in general. The results of the project would have wide applications from basic mineralogy to applications such as gemmology, material physics and technologies based on the use of minerals.