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Dostęp zamkniętyNovograblenovite from Radlin, Upper Silesia, Poland and its relation to „redikortsevite”
| cris.lastimport.scopus | 2024-02-12T20:23:36Z |
| dc.abstract.en | The paper presents detailed mineralogical and structural characteristics of novograblenovite that occurs abundantly on a burning coal dump at Radlin, Upper Silesia, Poland. Our results indicate that NH4MgCl3⋅6H2O is the proper formula of this mineral. The thermal behaviour of novograblenovite shows a two-step dehydration at 155 and 193°C and sublimation of NH4Cl at 341°C. A Raman spectrum, obtained for the first time, reveals the normal modes of H2O and NH4+ vibrations. The crystal structure of novograblenovite was refined on the basis of high quality X-ray diffraction data. The final discrepancy factor wR2 was 0.0567 for 94 parameters and 1464 independent reflections. The structure has a monoclinic C2/c space group symmetry with the following unit cell parameters: a = 9.2709(3) Å, b = 9.5361(2) Å, c = 13.2741(4) Å and β = 90.054(3)°. We were able to specify the architecture of the disordered NH4+ cation located at the symmetry centre. This led to reasonable parameters for the H-bonding formed by this cation. In carnallite the K+ cations occupy an identical space to the ammonium ion in novograblenovite, but when embedded into the latter crystal structure it is bound less tightly. Voids occupy 14% of the space in the novograblenovite crystal structure. Novograblenovite is exactly the same phase as the ‘redikortsevite’ described previously from Chelabinsk coal dumps and this informally introduced name should be abandoned. |
| dc.affiliation | Uniwersytet Warszawski |
| dc.contributor.author | Stachowicz, Marcin |
| dc.contributor.author | Parafiniuk, Jan |
| dc.contributor.author | Woźniak, Krzysztof |
| dc.date.accessioned | 2024-01-25T13:52:40Z |
| dc.date.available | 2024-01-25T13:52:40Z |
| dc.date.issued | 2021 |
| dc.description.finance | Publikacja bezkosztowa |
| dc.description.volume | 85 |
| dc.identifier.doi | 10.1180/MGM.2020.105 |
| dc.identifier.issn | 0026-461X |
| dc.identifier.uri | https://repozytorium.uw.edu.pl//handle/item/113971 |
| dc.identifier.weblink | https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0026461X2000105X |
| dc.language | eng |
| dc.pbn.affiliation | chemical sciences |
| dc.relation.ispartof | Mineralogical Magazine |
| dc.relation.pages | 132-141 |
| dc.rights | ClosedAccess |
| dc.sciencecloud | nosend |
| dc.subject.en | eywords burning coal dumps |
| dc.subject.en | ammonium mineral |
| dc.subject.en | crystal structure |
| dc.subject.en | differential thermal analysis |
| dc.subject.en | Raman spectroscopy |
| dc.subject.en | novograblenovite |
| dc.title | Novograblenovite from Radlin, Upper Silesia, Poland and its relation to „redikortsevite” |
| dc.type | JournalArticle |
| dspace.entity.type | Publication |