@prefix dcat: <http://www.w3.org/ns/dcat#> .
@prefix dct: <http://purl.org/dc/terms/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix vcard: <http://www.w3.org/2006/vcard/ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

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    dct:description """
              Electron paramagnetic resonance study of a natural single crystal of natrolite was carried out at the frequency ν=36.772 GHz at room temperature. The angular dependence of the four symmetry-related spectra of Fe3+ in the three crystallographic planes was fitted to a spin Hamiltonian (S=5/2) of symmetry Ci. The rank 4 crystal field tensors at tetrahedral sites were calculated using the point-charge model to determine the principal axes orientations of their cubic and trigonal components. The analysis of zero-field splitting tensors and comparison with crystal field ones suggests that Fe3+ substitutes for Al3+ with no significant distortion of the coordination tetrahedron in natrolite. Comparison of data for several natural and synthetic crystals reveals that the 4-rank zero-field splitting tensor invariants for Fe3+ at the tetrahedral oxygen-coordinated sites are distinguishably smaller than those for Fe3+ at octahedral sites. Such comparative analysis may help to determine the substitutional sites in other crystals.
            """ ;
    dct:identifier "hal-00076878" ;
    dct:issued "2026-05-29T07:12:29.422768"^^xsd:dateTime ;
    dct:language "en" ;
    dct:modified "2026-05-29T07:12:29.422785"^^xsd:dateTime ;
    dct:publisher <https://rec.harvest-normandie.data4citizen.com/organization/cce9db95-46d9-4dc2-84b6-764215d0a002> ;
    dct:title "Low-Symmetry Spin Hamiltonian and Crystal Field Tensors Analysis: Fe3+ in Natrolite" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "CCSD" ] ;
    dcat:distribution <https://rec.harvest-normandie.data4citizen.com/dataset/oai-hal-hal-00076878v1/resource/7362484f-a0eb-4971-8fec-81a04632b715> ;
    dcat:keyword "crystal-field",
        "infoeu-reposemanticsarticle",
        "journal-articles",
        "low-symmetry-effect",
        "natrolite",
        "sdustugpsciences-of-the-universe-physicsearth-sciencesgeophysics-physicsgeo-ph",
        "spin-hamiltonian",
        "tensor-invariants" ;
    dcat:landingPage <ISSN:%201090-7807> .

<ISSN:%201090-7807> a foaf:Document .

<https://rec.harvest-normandie.data4citizen.com/dataset/oai-hal-hal-00076878v1/resource/7362484f-a0eb-4971-8fec-81a04632b715> a dcat:Distribution ;
    dct:format "HTML" ;
    dct:issued "2026-05-29T07:12:29.518974"^^xsd:dateTime ;
    dct:modified "2026-05-29T07:12:29.374878"^^xsd:dateTime ;
    dct:title "Low-Symmetry Spin Hamiltonian and Crystal Field Tensors Analysis: Fe3+ in Natrolite" ;
    dcat:accessURL <https://insu.hal.science/hal-00076878> .

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