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@prefix dc: <http://purl.org/dc/terms/> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

sub:Head {
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    np:hasProvenance sub:provenance;
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sub:assertion {
  <https://w3id.org/delphi/resource/claim/bragg1915-03> a <https://w3id.org/delphi/ontology/Claim>;
    dc:description "In diamond the carbon atoms lie on two interpenetrating face-centred cubic lattices, and each carbon atom of one lattice is surrounded by four carbon atoms of the other arranged tetrahedron-wise.";
    dc:type "empirical-generalization";
    <http://www.w3.org/2000/01/rdf-schema#comment> "Related claim <https://w3id.org/delphi/resource/claim/thompson1917-ch09-10> (same-quantity): The tetrahedral angle, arccos(-1/3) = 109.47°, appears in both: in diamond as the C-C-C bond angle measured here from the refined structure, in Thompson as the angle between the rays of a four-rayed spicule formed at the junction of four equal cells. In the crystal it is a fact of the lattice; in the spicule it is a claim about cell packing that has not been tested on specimens.";
    <http://www.w3.org/2000/01/rdf-schema#label> "In diamond each carbon atom is surrounded tetrahedrally by four others on two interpenetrating face-centred lattices";
    <http://www.w3.org/2004/02/skos/core#notation> "\\text{CN}(\\text{C}) = 4,\\ \\angle = 109.47^\\circ";
    <http://www.w3.org/2004/02/skos/core#related> <https://w3id.org/delphi/resource/claim/thompson1917-ch09-10>;
    <https://w3id.org/delphi/ontology/context> "Bragg WH et al., “X Rays and Crystal Structure”, G. Bell and Sons, London (1915); X Rays and Crystal Structure, ch. VIII, p. 108. Scope: Diamond structure." .
}

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    dc:bibliographicCitation "Bragg WH, Bragg WL. X Rays and Crystal Structure. G. Bell and Sons, London (1915)";
    dc:creator "William Henry Bragg and William Lawrence Bragg";
    dc:date "1915"^^xsd:gYear;
    dc:description "First edition, University of Toronto copy.";
    dc:rights "Public domain (1915).";
    dc:title "X Rays and Crystal Structure";
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    <http://www.w3.org/2000/01/rdf-schema#comment> "Page 108 of the reading copy; paragraph 1377 of the normalised text 1915-bragg-book.txt (sha256 61f0ad3ced5e5ea0acb3b9ad17a90be706ce23c8ff5888140b807bea94b3e55d), produced by build/fetch.py and checked by build/check-quotes.mjs. The text itself is not committed.";
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    <https://schema.org/text> "the carbon atoms are arranged on two interpenetrating face-centred lattices. Each carbon atom of lattice B is surrounded by four carbon atoms belonging to lattice A, arranged tetrahedron-wise, and vice versa" .
  
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sub:pubinfo {
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    <http://www.w3.org/2000/01/rdf-schema#label> "William Henry Bragg and William Lawrence Bragg 1915 claim: In diamond each carbon atom is surrounded tetrahedrally by four others on two interpenetrating face-centred lattices";
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