Zobrazeno 1 - 8
of 8
pro vyhledávání: '"Yana Tzvetanova"'
Publikováno v:
Journal of Spectroscopy, Vol 2013 (2013)
Hydration of cement with and without fly ash is studied with Mössbauer spectroscopy, XRD, and thermal analysis. Iron in cement is present as Fe3+-ions and occupies two octahedral positions, with close isomer shifts and quadrupole splittings. Iron in
Externí odkaz:
https://doaj.org/article/2b8fc7b3837749ad9b6e58fe0b0dfb5d
Publikováno v:
Review of the Bulgarian Geological Society. 83:47-50
A series of ceramics in the system CaO–Cr2O3–MgO–SiO2 was synthesized via solid-state high temperature sintering at 1000, 1100 and 1200 °C. The resulting ceramics were examined by powder X-ray diffraction, scanning electron microscopy, infrare
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::183961548f429c3856b03e0b8e30ade7
https://doi.org/10.52215/rev.bgs.2022.83.3.47
https://doi.org/10.52215/rev.bgs.2022.83.3.47
Autor:
Yana Tzvetanova, Iskra Piroeva
Publikováno v:
Review of the Bulgarian Geological Society. 83:51-54
Thaumasite was found in zoned calcic skarns hosted by the monzonitic rocks of the Zvezdel pluton, Eastern Rhodopes. Associated minerals are wollastonite, clinopyroxene, grossular-andradite garnets, Ti-rich garnets, plagioclase, calcite, quartz, epido
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ef2c1aabc63bac0e16da4b596e490cb2
https://doi.org/10.52215/rev.bgs.2022.83.3.51
https://doi.org/10.52215/rev.bgs.2022.83.3.51
Publikováno v:
Minerals; Volume 12; Issue 12; Pages: 1576
The structural features and the thermal behavior of natural, Na-, Ca-, K-, Mg-, and Cd-exchanged clinoptilolite from the Beli Plast deposit (Bulgaria) were studied. Purified clinoptilolite sample was preliminary prepared and ion-exchanged at 100 °C
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7995de0632fc0c86cac111eebc7dc33e
The studied samples include three composite coal, three lithotypes (lyptain, xylain, and fusain), anda black clay parting from the Troyanovo 1 and Troyanovo North mines in the largest Maritsa East lignite basinin Bulgaria. Mineral matter in composite
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::25c8c04a2ea94d9291a543b121484d55
https://zenodo.org/record/7533589
https://zenodo.org/record/7533589
Publikováno v:
Review of the Bulgarian Geological Society. 81:78-80
In this work we report data from LA-ICP-MS analyses of 7 bentonite samples from the Eastern Rhodopes as three of the samples come from two bentonite deposits – Zlatna Livada and Propast-Dobrovolets. The obtained results show no significant accumula
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1546ea9bc9bda607b60eadd0c629ff1e
https://doi.org/10.52215/rev.bgs.2020.81.3.78
https://doi.org/10.52215/rev.bgs.2020.81.3.78
Autor:
Dimitrina Dimitrova, Stoyan Georgiev, Milena Vetseva, Mariana Yossifova, Yana Tzvetanova, Rositsa Ivanova
Publikováno v:
Goldschmidt Abstracts.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e18a7a6a70ff6b8a93f9ab59e85d5f37
https://doi.org/10.46427/gold2020.582
https://doi.org/10.46427/gold2020.582