diplomsko delo
Hana Bradač (Author), Amalija Golobič (Mentor)

Abstract

Metodo rentgenske praškovne difrakcije uporabljamo za karakterizacijo trdnih vzorcev. S to metodo sem analizirala 14 vzorcev mineralov prsti in kamnin, ki sem jih odvzela na različnih krajih v okolici Ivančne Gorice. Po pripravi vzorcev in posnetih difraktogramih sem za posamezen vzorec izvedla kvalitativno in kvantitativno analizo. Kvalitativno analizo sem izvedla s pomočjo programa Crystalographica Search Match in zbirke praškovnih difraktogramv (PDF-2). Rentgenski praškovni difraktogram je karakterističen za določeno trdnino in tako tudi za minerale. Zato sem na podlagi ujemanja uklonov na difraktogramu standardov iz PDF-2 zbirke in difraktograma vzorca lahko identificirala, kateri minerali so prisotni v vzorcih. Vsebnost identificiranih faz sem potrdila še s kvantitativno analizo s programom TOPAS, kjer sem z Rietveldovo metodo določila masne deleže identificiranih mineralov. Ugotovila sem, da se v vzorcih najpogosteje pojavljajo karbonati in silikati, tako po vsebnosti kot po masnem deležu v vzorcu. Sulfidi in oksidi (razen silicijevega) pa se pojavijo malokrat in v zelo majhnih količinah. Vzorci kamnin vsebujejo pretežno dolomit in kalcit, kar pomeni, da imajo karbonatno sestavo. Kamen v vzorcu št. 3 pa je bil na izgled in po sestavi drugačen in poleg karbonatov vsebuje še sulfide, okside ter silikate. Vzorci prsti in glin so vsi vsebovali precej kremena ter tudi silikatna minerala muskovit in klinoklor ter razen vzorca 1 tudi dolomit in v nekaterih primerih tudi kalcit. Rezultati analize vzorcev se ujemajo s podatki o geološki sestavi tal na področju Ivančne Gorice, navedeni v geološki karti Slovenije.

Keywords

rentgenska praškovna difrakcija;kvalitativna fazna analiza;kvantitativna fazna analiza;prst;diplomske naloge;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL FKKT - Faculty of Chemistry and Chemical Technology
Publisher: [H. Bradač]
UDC: 543.442.3:549(043.2)
COBISS: 168145667 Link will open in a new window
Views: 37
Downloads: 6
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Other data

Secondary language: English
Secondary title: MINERAL COMPOSITION OF ROCKS AND SOILS AT IVANČNA GORICA REGION
Secondary abstract: The X-ray powder diffraction is used to characterize solid samples. Using this method, 14 samples of soil and rock minerals taken from various places around Ivančna Gorica, were analysed. After preparing the samples and measuring diffractograms, I performed a qualitative and quantitative analysis for each sample. A qualitative analysis was done using the Crystalographica Search Match program and a collection of powder diffractograms (PDF-2). The X-ray powder diffraction pattern is characteristic for a particular solid and thus also for minerals. Therefore, based on the matching of reflections on the diffractogram of the standards from the PDF-2 database with those on diffractogram of the sample, I was able to identify which minerals are present in the samples. I also confirmed the content of the identified phases with a quantitative analysis using the TOPAS program, where I determined the mass fractions of the identified minerals using the Rietveld method. I found that carbonates and silicates occur most often in the samples, both in terms of content and mass fraction in the sample. Sulphides and oxides (except quartz) occur rarely and in very small quantities. The rock samples contain predominantly dolomite and calcite, which means they have a carbonate composition. Stone in sample no. 3 was different in appearance and composition and, in addition to carbonates, also contains sulphides, oxides and silicates. The soil and clay samples all contained considerable amount of quartz as well as the silicate minerals muscovite and clinochlore and, except for sample 1, also dolomite and, in some cases, calcite. The results of the sample analysis match with the data in the geological map of Slovenia for the region around Ivančna Gorica.
Secondary keywords: X-ray powder diffraction;qualitative phase analysis;quantitative phase analysis;minerals;rocks;soil;Kamnine;Minerali;Univerzitetna in visokošolska dela;
Type (COBISS): Bachelor thesis/paper
Study programme: 1000374
Embargo end date (OpenAIRE): 1970-01-01
Thesis comment: Univ. v Ljubljani, Fak. za kemijo in kemijsko tehnologijo, VSŠ Kemijska tehnologija
Pages: 53 str.
ID: 19896679