Property talk:P556

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crystal system
type of crystal for minerals and/or for crystal compounds

Description	crystal system (Q898786) : Type of crystal for crystal coumpounds
Represents	crystal system (Q898786)
Data type	Item
Template parameter	"Système cristallin" in fr:modèle:Infobox chimie
Domain	According to this template: term According to statements in the property: group or class of chemical substances (Q17339814) or chemical substance (Q79529) When possible, data should only be stored as statements
Allowed values	According to this template: crystal system (Q898786) : cubic, hexagonal, trigonal, tetragonal, orthorhombic, monoclinic, triclinic, quasicrystal, amorphous solid According to statements in the property: triclinic crystal system (Q376927), monoclinic crystal system (Q624543), orthorhombic crystal system (Q648961), tetragonal crystal system (Q503601), trigonal crystal system (Q588274), hexagonal crystal system (Q663314), cubic crystal system (Q473227), quasicrystal (Q263214), amorphous solid (Q103382) or unknown When possible, data should only be stored as statements
Example	sodium chloride (Q2314) → cubic crystal system (Q473227) shigaite (Q13112) → trigonal crystal system (Q588274)
Tracking: usage	Category:Pages using Wikidata property P556 (Q55667405)
Lists	Items with the most statements of this property Count of items by number of statements (chart) Items with the most statements Items with the fewest statements Count of items by number of sitelinks (chart) Items with the most sitelinks Items with the most sitelinks, but no link to one Wikipedia (sample: Welsh Wikipedia, cywiki) Items with the fewest sitelinks Most linked wikis Items with the most identifier properties By value of property Most statements Fewest statements Most sitelinks Most linked wikis Total of sitelinks on items Most identifiers Fewest identifiers Items with no other statements Most recently created items Items with novalue claims Items with unknown value claims Usage history (total) Usage history (main statement) Chart by item creation date Database reports/Constraint violations/P556 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 5,692 Main statement 5,690 >99.9% of uses Qualifier 2 <0.1% of uses
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[create Create a translatable help page (preferably in English) for this property to be included here]

Value type “crystal system (Q898786)”: This property should use items as value that contain property “instance of (P31)”. On these, the value for instance of (P31) should be an item that uses subclass of (P279) with value crystal system (Q898786) (or a subclass thereof). (Help)

List of violations of this constraint: Database reports/Constraint violations/P556#Value type Q898786, hourly updated report, SPARQL

One of triclinic crystal system (Q376927), monoclinic crystal system (Q624543), orthorhombic crystal system (Q648961), tetragonal crystal system (Q503601), trigonal crystal system (Q588274), hexagonal crystal system (Q663314), cubic crystal system (Q473227), quasicrystal (Q263214), amorphous solid (Q103382), somevalue: value must be one of the specified items. Please expand list if needed. (Help)

List of violations of this constraint: Database reports/Constraint violations/P556#One of, values statistics, hourly updated report, SPARQL

Single value: this property generally contains a single value. (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P556#Single value, SPARQL

Citation needed: the property must have at least one reference (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P556#citation needed

Scope is as main value (Q54828448): the property must be used by specified way only (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P556#Scope, SPARQL

Allowed entity types are Wikibase item (Q29934200): the property may only be used on a certain entity type (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P556#Entity types

Type “group or class of chemical substances (Q17339814), chemical substance (Q79529)”: item must contain property “instance of (P31), subclass of (P279)” with classes “group or class of chemical substances (Q17339814), chemical substance (Q79529)” or their subclasses (defined using subclass of (P279)). (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P556#Type Q17339814, Q79529, SPARQL

This property is being used by: ru:Шаблон:Изомеры es:Plantilla:Ficha de compuesto químico, es:Plantilla:Ficha de compuesto químico/pruebas2 uk:Шаблон:Мінерал hy:Կաղապար:Միներալ, hy:Կաղապար:Տեղեկաքարտ Նյութ eu:Txantiloi:Mineral infotaula, eu:Txantiloi:Konposatu kimiko infotaula/probak, eu:Txantiloi:Konposatu kimiko infotaula be-x-old:Шаблён:Мінэрал sk:Šablóna:Infobox minerál ca:Plantilla:Infotaula compost químic ast:Plantía:Ficha de compuestu químicu ha:Template:Infobox chemical incubator:Template:Wp/shi/Infobox chemical kab:Talɣa:Infobox chemical shi:Talɣa:Infobox chemical ga:Teimpléad:WD Bosca Sonraí Comhdhúil Cheimiceach, ga:Teimpléad:WD Bosca Sonraí Mianra ff:Template:Infobox chemical be-tarask:Шаблён:Мінэрал gv:Clowan:WD Kishtey Fys Co-vunstoo Please notify projects that use this property before big changes (renaming, deletion, merge with another property, etc.)

Specifying more specific crystal systems

Would this property be the right to use for noting the crystal structure of metals? For example copper (Q753) → face-centered cubic (Q3006714) (also making face-centered cubic (Q3006714) a subclass of cubic crystal system (Q473227). I think it would also make sense to make the relax the condition be subclass of crystal system (Q898786) regardless. Belteshassar (talk) 19:45, 1 June 2020 (UTC)

You have crystal system, point group, space group and cell parameters. See albite and sodium chloride. Regards --Chris.urs-o (talk) 17:41, 12 September 2020 (UTC)