@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#> .

<https://rec.harvest-normandie.data4citizen.com/dataset/oai-hal-hal-00090481v1> a dcat:Dataset ;
    dct:description """
              Amphiboles have been synthesized by hydrothermal techniques at 500–600 °C, 1 Kbar P(H2O) and low oxygen fugacity (close to NNO) at nominal compositions along the join ferri-clinoholmquistite [squareLi2Mg3Fe3+2Si8O22(OH)2] – ferri-clino-ferroholmquistite [squareLi2Fe2+3Fe3+2Si8O22(OH)2]. SEM-EDS and X-ray powder diffraction show that at 500 °C, amphibole is the dominant phase in the run assemblage, together with minor clinopyroxene + quartz, in the Fe-rich side of the join, up to sim50 mol. % ferri-holmquistite component in the system. For higher Mg contents, an assemblage consisting of predominant clinopyroxene + quartz is obtained, and amphibole is only a minor phase. At 600 °C, the situation is reversed: amphibole is the predominant phase in the Mg-rich side of the join (sim60–100 mol. % ferri-holmquistite component in the system). X-ray powder-diffraction patterns can be indexed in space group C2/m and cell parameters show well-defined linear trends as a function of nominal amphibole composition. Mössbauer spectra show that Fe3+ is strongly ordered at the M2 site, whereas Fe2+ is disordered over the B and C sites. The infrared OH-stretching spectra of intermediate compositions show fine structure caused by ordering of Mg and Fe2+ over the M1 and M3 sites in the amphibole; this fine structure consists of four main bands assigned to the four local combinations of (Mg,Fe2+) at M(1,3). The relative intensities of these bands show that there is almost complete Mg-Fe2+ substitution at M(1,3) in ferri-clinoholmquistite and that there is no significant short-range ordering (cluster and/or anti-clustering) between these two cations at the M(1,3) sites. The IR spectra show, in addition, four minor components that are assigned to (Fe2+,Mg) at M(4), indicating that the amphibole composition departs from the nominal one following the vector M4Fe2+ M2Mg M2Fe3+-1M4Li-1.
            """ ;
    dct:identifier "hal-00090481" ;
    dct:issued "2026-05-08T05:46:26.784270"^^xsd:dateTime ;
    dct:language "en" ;
    dct:modified "2026-05-08T05:46:26.784274"^^xsd:dateTime ;
    dct:publisher <https://rec.harvest-normandie.data4citizen.com/organization/cce9db95-46d9-4dc2-84b6-764215d0a002> ;
    dct:title "The (Mg,Fe2+) substitution in ferri-clinoholmquistite, squareLi2(Mg,Fe2+)3Fe3+2Si8O22(OH)2" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "CCSD" ] ;
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    dcat:keyword "cell-parameters",
        "ferri-clinoholmquistite",
        "infoeu-reposemanticsarticle",
        "infrared-and-mossbauer-spectroscopy",
        "journal-articles",
        "sdustumisciences-of-the-universe-physicsearth-sciencesmineralogy",
        "short-range-order",
        "synthesis" ;
    dcat:landingPage <ISSN:%200935-1221> .

<ISSN:%200935-1221> a foaf:Document .

<https://rec.harvest-normandie.data4citizen.com/dataset/oai-hal-hal-00090481v1/resource/cad8724e-8825-4338-aaf3-d472b9e2fd3e> a dcat:Distribution ;
    dct:format "HTML" ;
    dct:issued "2026-05-08T05:46:26.786106"^^xsd:dateTime ;
    dct:modified "2026-05-08T05:46:26.773681"^^xsd:dateTime ;
    dct:title "The (Mg,Fe2+) substitution in ferri-clinoholmquistite, squareLi2(Mg,Fe2+)3Fe3+2Si8O22(OH)2" ;
    dcat:accessURL <https://insu.hal.science/hal-00090481> .

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    foaf:name "test_moissonnage_selune" .