Ontology, archetypes and the definition of “mineral species”

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Marco E. Ciriotti
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Ontology, archetypes and the definition of “mineral species”

Messaggio da Marco E. Ciriotti » mer 03 mar, 2021 10:19

Prossima pubblicazione.

Referenza:
▪ Hawthorne, F.C., Mills, S.J., Hatert, F., Rumsey, M.S. (2021): Ontology, archetypes and the definition of “mineral species”. MIneralogical Magazine, 85, (in press).

Abstract:
Ontology deals with questions concerning what things exist, and how such things may be associated according to similarities and differences and related within a hierarchy. Ontology provides a rigorous way to develop a general definition of a mineral species. Properties may be divided into two principal groups: an intrinsic property is characteristic of the object and is independent of anything else; an extrinsic property depends on the relation between the object and other things. A universal is an entity that is common to all objects in a set. Here the objects are mineral samples, each entity is a specific property of these minerals, and the set of objects is all mineral samples of that mineral species. The key intrinsic properties of a mineral species are its name, its end-member formula and Z (the number of formula units in the unit cell), its space group and the bond topology of the end-member structure. These are also universals as they are common to all mineral samples belonging to that mineral species. An archetype is a pure form which embodies the fundamental characteristics of an object. Thus the archetype of a mineral species embodies the above set of universals. Real mineral samples of this mineral species are imperfect copies of that archetype, with a range of chemical composition defined by the boundaries between end-member formulae of this and other end members of the same bond topology. The result is a formal definition of a mineral species: A specific mineral species is the set of imperfect copies of the corresponding archetype and is defined by the following set of universals: name, end-member formula and Z, space group, and bond topology of the end-member structure, with the range of chemical composition limited by the compositional boundaries between end members with the same bond topology.

NdR: Vedasi al riguardo quanto consuntivato nell'ultimo messaggio in: viewtopic.php?f=5&t=3276&start=30
Marco E. Ciriotti

«Things are interesting only in so far as they relate themselves to other things»

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Marco E. Ciriotti
Messaggi: 27902
Iscritto il: ven 25 giu, 2004 11:31
Località: via San Pietro, 55 I-10073 Devesi/Cirié TO - Italy
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Re: Ontology, archetypes and the definition of “mineral species”

Messaggio da Marco E. Ciriotti » dom 18 apr, 2021 10:24

Pubblicazione effettuata.

Referenza:
▪ Hawthorne, F.C., Mills, S.J., Hatert, F., Rumsey, M.S. (2021): Ontology, archetypes and the definition of “mineral species”. MIneralogical Magazine, 85, 125-131.
Marco E. Ciriotti

«Things are interesting only in so far as they relate themselves to other things»

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