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Mineralogical speciation of the radium isotopes in Karlovy Vary hot spring sediments: Results of the selective dissolution
Supiňková, Taťána ; Goliáš, Viktor (advisor) ; Smrček, Stanislav (referee)
Thermal waters in Karlovy Vary are characterized by carbonate sedimentation in places of their emergence. These sediments contain radium. Radium bond in every type of sinter (aragonite, calcite) has been investigated experimentally by acid sinter dissolution. It has been found out, that radium can join dissoluble fraction in both sinter types . The original hypothesis that radium can bond only aragonite-type of sinter has been refuted. Additional experiments have been processed using synthetic radiobarite. Present radium in radiobarite can be partly dissoluted using acids. If radium was incorporated in radiobarite (it is known from locality Vřídlo in Karlovy Vary and elsewhere) then maybe it would be partly dissoluted in experiments.
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The content and binding of silver in galena
Němec, Matěj ; Goliáš, Viktor (advisor) ; Zachariáš, Jiří (referee)
Galena as the most important silverbearing ore is found in almost every Ag deposit. If the content of Ag is higher than 0,5 wt. % then is called galena solid solution - PbSss. The galena Ag has two forms of occurrence - inclusions and isomorphic silver. Aboat ninety percent of galena Ag is product of retrograde proces of PbSss cooling. These are matildite (AgBiS2), miargyrite (AgSbS2), diaforite (PbAg3Sb3S8), freislebenite (AgPbSbS3), pyrargyrite (Ag3SbS3) aramayoite (Ag(Sb,Bi)S2), freibergite (Ag12Sb4S13), gustavite (AgPbBi3S6) etc. The smaller amounth of isomorphic Ag is substituted as 2Ag+ = PbII+ . Under the usual conditions of deposition (200 - 300řC) , the solubility of Ag2S is to low. The content of Ag in galena under these conditions is not higher then 0,4 mol. % at 615řC. Most of the isomorphic Ag is bound in coupled substitution Ag+ + Bi III+ /Sb III+ = 2 PbII+ . In this case the content of Ag in PbS can be as high as 9 wt. % at 350 - 400řC. At the deposites where wasn't activated this Bi/Sb - Pb coupled substitution the content of Ag in galena is very low. The content of trace elements of Ag, Bi and Sb can also influence the galena crystal habit. Galena rich on Bi ususaly creates octahedral crystals. Galena with a higher content of Ag and Sb usualy creates cubic crystals.
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The Identification and the Origin of the Gemstones Adorning the Insignia of the Charles University in Prague , the Faculty of Science
Petrová, Zdeňka ; Hanusová, Irena (referee) ; Goliáš, Viktor (advisor)
The issue of a sceptre for the newly founded Faculty of Science was first discussed on the meeting of Faculty professors on the 25th November 1921, more than a year after the separation of the Faculty of Science from the Faculty of Arts. The commission elected from among the professors proposed a motion that the new Faculty sceptre should resemble the sceptre of the parental Faculty of Arts. Through a mediation of the Ministry of Education and National Enlightment the design of the new sceptre was ordered from the Academy of Arts, Architecture and Design and it was elaborated by prof. Jaroslav Horejc. However, in January 1923, his design was rejected, because it didn't meet the requirements of the professors' conservative approach. When prof. Horejc refused to make a modified copy of the sceptre of the Faculty of Arts, the professors addressed Tengler, the goldsmith who had made the sceptres of other faculties and of the rector in previous years. Alois Tengler was willing to make a modified copy of the sceptre of Faculty of Arts, but he also proposed a new design (with estimated price of 20 000 K), which the professors found more suitable and subsequently this design was adopted. Tengler committed himself to manufacture the sceptre by the 15th November 1924 and to incorporate any additional design...
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Radon-in-waters measurement methods
Hrušková, Lenka ; Třískala, Zdeněk (referee) ; Goliáš, Viktor (advisor)
Higher concentrations of radon are probably harmful to our health, on the other side its lower concentrations have terapeutical effect, which is used in a spa. Its characteristical properties are suitable for mineralogical research, hydrological and environmental studies and for an earthquake and vulcanic prognosis. In this work, there are explained methods of ray measuring, scintilation detektor and ionization chamber and there are compared devices like radon-in-air monitor, device with a hydrphobical membrane and device with a method using olive-oil. dtto cz.
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Comparison of oxyhumolite of the Sokolov basin with materials which are using in spa and alternative medicin and its possible usage in these spheres
Dúcka, Barbora ; Goliáš, Viktor (referee) ; Rojík, Petr (advisor)
This work deal with a brief characterization of three materials, namely oxyhumolite and sapropelite from Sokolov basin that are compared with peat from Františkovy Lázně. The sampling localities are briefly geographically and geologically described including the genesis of the deposits. All materials are specifically characterized by analysis. The materials are compared based on the results of the analysis. Greater attentinon is paid to the comparison of sulfur content, humic acides and warmth retention. A part of the work is devoted to description of peloids and their influence on the human organism. The history of using peloids is briefly discussed. The possibility of using oxyhumolite and sapropelite for production of natural cosmetics or for balneological use is examined as a replacement for native and especially for regenerated peat.
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