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Pregled bibliografske jedinice broj: 6522

Heating products of glauconitic materials


Slovenec, Dragutin; Popović, Stanko; Tadej, Neven
Heating products of glauconitic materials // Neues Jahrbuch für Mineralogie : Abhandlungen, 171 (1997), 3; 323-339 (međunarodna recenzija, članak, znanstveni)


CROSBI ID: 6522 Za ispravke kontaktirajte CROSBI podršku putem web obrasca

Naslov
Heating products of glauconitic materials

Autori
Slovenec, Dragutin ; Popović, Stanko ; Tadej, Neven

Izvornik
Neues Jahrbuch für Mineralogie : Abhandlungen (0077-7757) 171 (1997), 3; 323-339

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
glauconite; glauconitic materials; glauconites-smectites; heating products of glauconitic materials; magnesioferrite; hematite; enstatite; lower miocene sandstones from Hrvatsko Zagorje

Sažetak
Four practically pure, mutually chemically different, glauconitic materials, as mixtures of glauconite and interstratified glauconites-smectites (having relatively small expandibility) were isolated from the Lower Miocene sandstones at several localities in Croatia. Glauconitic materials were successively heated for 3 horus at 980, 1080, 1180, and 1300^oC. The heat-traeted samples were analysed by means of X-ray powder diffraction (identification, determination of the unit-cell parameter a of magnesioferrite and semiquantitative phase analysis). The amounts of FeO in samples were also determined. On the basis of the data obtained for the heat-treated samples and the data on the starting glauconitic materials (using the “wet” chemical analysis, infrared spectroscopy, differential thermal analysis and thermogravimetry, beside X-ray diffraction), the following conclusion was drawn: (1) after the destruction of the crystal structure of glauconite, the heating products at 980^oC were an amorphous fraction (glass) and magnesioferrite ; (2) in the materials for which the content of Fe^3+ was much bigger than that of AlˆVI, magnesioferrites were formed which were solid solutions of MgFe_2O_4, gama-Fe_2O_3 and Fe_3O_4 ; otherwise, in the material with a high amount of AlˆVI a magnesioferrite was formed which also contained Al ; (3) the fraction of magnesioferrite gradually decreased as the temperature of heating increased to 1080 and 1180^oC, while hematite and enstatite were formed ; (4) after heating at 1300^oC magnesioferrite was again the single crystalline phase, but containing a bigger amount of divalent iron and having a bigger unit-cell parameter a than magnesioferrite formed at 980^oC.

Izvorni jezik
Engleski

Znanstvena područja
Geologija, Kemija



POVEZANOST RADA


Projekti:
00980903
195004
195005

Ustanove:
Institut "Ruđer Bošković", Zagreb,
Rudarsko-geološko-naftni fakultet, Zagreb

Profili:

Avatar Url Neven Tadej (autor)

Avatar Url Dragutin Slovenec (autor)

Avatar Url Stanko Popović (autor)


Citiraj ovu publikaciju

Slovenec, Dragutin; Popović, Stanko; Tadej, Neven
Heating products of glauconitic materials // Neues Jahrbuch für Mineralogie : Abhandlungen, 171 (1997), 3; 323-339 (međunarodna recenzija, članak, znanstveni)
Slovenec, D., Popović, S. & Tadej, N. (1997) Heating products of glauconitic materials. Neues Jahrbuch für Mineralogie : Abhandlungen, 171 (3), 323-339.
@article{article, year = {1997}, pages = {323-339}, keywords = {glauconite, glauconitic materials, glauconites-smectites, heating products of glauconitic materials, magnesioferrite, hematite, enstatite, lower miocene sandstones from Hrvatsko Zagorje}, journal = {Neues Jahrbuch f\"{u}r Mineralogie : Abhandlungen}, volume = {171}, number = {3}, issn = {0077-7757}, title = {Heating products of glauconitic materials}, keyword = {glauconite, glauconitic materials, glauconites-smectites, heating products of glauconitic materials, magnesioferrite, hematite, enstatite, lower miocene sandstones from Hrvatsko Zagorje} }
@article{article, year = {1997}, pages = {323-339}, keywords = {glauconite, glauconitic materials, glauconites-smectites, heating products of glauconitic materials, magnesioferrite, hematite, enstatite, lower miocene sandstones from Hrvatsko Zagorje}, journal = {Neues Jahrbuch f\"{u}r Mineralogie : Abhandlungen}, volume = {171}, number = {3}, issn = {0077-7757}, title = {Heating products of glauconitic materials}, keyword = {glauconite, glauconitic materials, glauconites-smectites, heating products of glauconitic materials, magnesioferrite, hematite, enstatite, lower miocene sandstones from Hrvatsko Zagorje} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus





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