halide class of minerals
Enable an agent to recognize membership in the halide class of minerals, assess identification and preservation evidence, and select justified specimen-level actions.
Bundle → Layer → Finding → Questions Filled
6 bundles · 11 layers · 19 findings · 39 questions
Class boundaries and membership Establish what counts as a member of this mineral class and which authority supports that decision.
Classification authority
Anchor membership to a documented classification system.
Versioned class assignment
Record the adopted class definition, subdivision and assignment evidence.
- Which classification system and edition define halides for this model? definition
- Which source explicitly assigns the candidate species to that class and subgroup? provenance
- Does another relevant classification place the species differently? boundary
Mineral versus neighbouring entities
Distinguish class members from halogen-bearing materials with different identities.
Phase and origin boundary
Require evidence distinguishing a natural mineral phase from synthetic material, solution or aggregate.
- What establishes that the object is a mineral phase rather than dissolved salts or an unresolved mixture? boundary
- What evidence establishes natural occurrence, laboratory synthesis or uncertain origin? provenance
- Is the halogen essential to a halide-class assignment or present within a mineral assigned elsewhere? boundary
Anion chemistry and crystal identity Represent the composition and structural evidence that distinguish members.
Composition and anion role
Resolve constituent halogens, charge balance and additional anionic components.
Formula and substitution evidence
Separate ideal stoichiometry from measured substitution and contamination.
- Which halogens and cations occur, and what measured abundances support the proposed formula? measurement
- Are oxygen, hydroxyl or complex anions structurally required, and how does that affect subgroup assignment? definition
- Do departures from the ideal formula reflect substitution, analytical limitations or another phase? boundary
Structure and water
Resolve crystallographic identity and the role of water.
Structural phase discrimination
Use structure and hydration evidence to distinguish chemically similar candidates.
- Which diffraction or structural observations support the proposed phase? measurement
- Is detected water structural, adsorbed or held in inclusions, and how was this distinguished? measurement
- Could the observations indicate a different hydrate or polymorph? boundary
Specimen identification and mixtures Turn specimen observations into a defensible mineral identification.
Diagnostic observations
Evaluate physical and instrumental observations against candidate species.
Candidate discrimination
Record which observations distinguish plausible halide and non-halide candidates.
- Which observed cleavage, hardness, density or optical properties discriminate the candidate species? measurement
- Which competing identities remain consistent with the current evidence? boundary
- Which additional analysis would resolve the remaining ambiguity while preserving the relevant phase? action
Phase-resolved sampling
Link each result to the material actually examined.
Grain, crust and bulk separation
Distinguish a mineral grain from associated salts, inclusions and later surface deposits.
- Was the analysis performed on a selected grain, surface crust, inclusion or bulk aggregate? provenance
- What evidence separates the proposed halide phase from intergrown or contaminating phases? measurement
- Could preparation have dissolved, transformed or redistributed the phase being identified? boundary
Occurrence and phase stability Connect geological context with observed formation and alteration conditions.
Geological context
Record the formation interpretation and its mineralogical evidence.
Formation and association evidence
Test formation hypotheses against locality, textures and associated phases.
- What locality, host material, textures and associated minerals are documented? provenance
- What evidence supports the proposed evaporitic, hydrothermal, volcanic, secondary or other origin? provenance
- Could the halide deposit have formed after collection rather than in the reported geological setting? boundary
Environmental response
Record member-specific evidence for dissolution, hydration and other phase changes.
Condition-dependent phase persistence
Describe the conditions under which the identified phase persists or changes.
- Under what measured temperature, humidity or solution conditions does the phase persist or change? measurement
- What observations distinguish dissolution, deliquescence, dehydration and replacement where relevant? measurement
- Which limits come from experiments on this species, and which are extrapolated from related materials? provenance
Preservation and material decisions Translate identified composition and condition into justified specimen actions.
Storage and preparation
Choose handling conditions that preserve diagnostic chemistry and structure.
Phase-preserving treatment
Ground cleaning, mounting, storage and analysis in member-specific evidence.
- What evidence supports the chosen humidity, temperature, light exposure and container conditions? action
- Are water, solvents, adhesives, heating or vacuum compatible with retaining the identified phase? action
- Which observations should be repeated to detect alteration during storage or analysis? measurement
Composition-dependent use
Assess handling and proposed use at the species and specimen level.
Handling and use evidence
Connect actual composition, impurities and physical form to a proposed action.
- Which identified constituents and exposure routes determine handling requirements for this specimen? action
- What phase purity, impurity concentrations and performance measurements are needed for the proposed use? measurement
- Does the decision require a separate model of a processed product, commercial grade or extraction process? boundary
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Check these first
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these check these first hold for the sense of halide class of minerals this model covers, and on what evidence? provenance
Kinds and varieties
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these kinds and varieties hold for the sense of halide class of minerals this model covers, and on what evidence? provenance
Identifiers and schemes
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these identifiers and schemes hold for the sense of halide class of minerals this model covers, and on what evidence? provenance
Standards and regulation
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these standards and regulation hold for the sense of halide class of minerals this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these real-world use hold for the sense of halide class of minerals this model covers, and on what evidence? provenance
Typical measurements
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these typical measurements hold for the sense of halide class of minerals this model covers, and on what evidence? provenance
Failure modes and hazards
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these failure modes and hazards hold for the sense of halide class of minerals this model covers, and on what evidence? provenance
Regional variation
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these regional variation hold for the sense of halide class of minerals this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of halide class of minerals this model covers, and on what evidence? provenance
Classifiers Filled
- Family
- Thing Registry
- Category
- Physical world and living systems
- Entry kind
- thing
- Plane
- PHY
- Domain
- PHY.MAT
- Other names and narrower kinds
- pinalite, fiedlerite, mikecoxite, bounahasite, cumengeite, calomel group, napoliite, manuelarossiite, chlorargyrite group, gajardoite-(NH₄), chukhrovite mineral group, vegrandisite
What it is Filled
The halide class of minerals comprises mineral species classified principally by halogen anions - fluoride, chloride, bromide or iodide - combined with metal or other cations, with some classification schemes also including related oxyhalides and hydroxyhalides.
In scope
- Membership criteria under an explicitly named mineral classification and edition
- Halogen-bearing anion chemistry, cation composition, hydration and structural distinctions among members
- Evidence distinguishing a halide mineral phase from mixtures, dissolved salts and synthetic counterparts
- Geological occurrence and associations relevant to identification
- Member-specific stability, preservation and analytical constraints
Out of scope
- Complete standalone models of individual mineral species
- Halide compounds considered independently of mineral occurrence
- Halogen-bearing minerals assigned to other mineral classes
- Brines, evaporite rocks and ore bodies as whole mixtures or geological objects
- Industrial salt products, extraction processes and commercial grades
- Class-wide CAS identifiers, hazard classifications or melting points
Why it exists Filled
Enable an agent to recognize membership in the halide class of minerals, assess identification and preservation evidence, and select justified specimen-level actions.
Distinguishing features Filled
- Require a mineral-class assignment under a named classification; detecting fluorine, chlorine, bromine or iodine alone does not establish membership.
- Separate the class from its member species: halite is a classified member, not a synonym for the whole class. See [Mindat: Halite](https://www.mindat.org/min-1804.html).
- Record structural water rather than treating every member as an anhydrous salt: hydrohalite is classified among simple halides with water. See [Mindat: Hydrohalite](https://www.mindat.org/min-1975.html).
- Check the adopted system's treatment of complex anions: Hey's halide category explicitly includes fluoborates and fluosilicates. See [Mindat: Hey's Chemical Index](https://www.mindat.org/cim.php?a=8).
- Require evidence for the mineral phase and its origin; a dissolved halide ion, synthetic salt or multiphase crust is not automatically an identified natural halide mineral.
What robots and AI may and may not do Filled
Must not
- Recommend tasting a mineral as an identification test.
- Collect specimens from protected sites or mines without permission.
- Sell specimens with false locality or treatment information.
- Handle soluble or toxic halide minerals without appropriate precautions.
Only with a human decision
- Removing specimens from a protected geological site.
May
- Identify halide minerals from published properties and laboratory tests.
- Describe halide mineral species using approved mineral names.
- Record specimen locality and provenance for collections.
Moral aspects Filled
- Some halide minerals are toxic or dissolve readily, so safe handling matters to collectors and children.
- Mineral collecting can damage scientific sites and deprive future study.
Who is affected
- Collectors and students
- Mine and museum workers
- Geological heritage
Owners Filled
Steward
Nobody owns the class; the landowner or mineral rights holder owns specimens in the ground.
Master systems
- International Mineralogical Association list of approved mineral species
Links to other meta-models Filled
parent
- Q5128405 - registry parent class
- Q7946 - registry parent class
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.halide-class-of-minerals
- Wikidata: Q729283 (https://www.wikidata.org/wiki/Q729283)
Direct properties required Filled
- Classification assignment: Classification name, edition or version, class code, subgroup and supporting reference
- Member identity and nomenclatural status: Mineral species reference; accepted, historical, disputed or unresolved name with authority and date
- Halogen and anion constitution: F, Cl, Br and I constituents; simple or complex anions; associated O and OH where applicable
- Composition and substitution: Ideal formula; measured mass fractions in wt%; normalized atoms per formula unit; uncertainty
- Structural hydration: Anhydrous, hydrated or unresolved; H2O per formula unit where established
- Crystal structure evidence: Crystal system, space group, reference structure and diffraction match with uncertainty
- Diagnostic physical observations: Mohs hardness, density in g/cm3, refractive indices and categorical cleavage observations, each specimen-specific
- Environmental stability evidence: Observed phase response at temperature in °C, relative humidity in %, and specified solution composition and exposure duration
- Occurrence and phase association: Locality, host material, associated mineral phases, texture and proposed formation setting
- Handling evidence: Identified constituent, specimen form, exposure route and applicable species- or material-specific source
Recognition required Filled
- Cubic or octahedral crystals in many species, such as rock salt and fluorite.
- Often transparent to translucent, colourless or in bright colours from impurities.
- Several species dissolve in water and feel damp in humid air.
- Many show perfect cleavage, breaking into regular blocks.
Capabilities and actions required Filled
- Assign or challenge class membership using explicit chemical, structural and classification evidence.
- Compare candidate mineral species and select analyses that distinguish them.
- Separate individual halide phases from associated minerals, surface deposits and synthetic material.
- Select storage and preparation conditions supported by the identified member's stability evidence.
- Assess whether a specimen supports a proposed material use and identify the additional purity or performance evidence needed.
Hazards and failure modes required Filled
- Some species contain toxic elements and should not be tasted or handled carelessly.
- Soluble specimens dissolve or decay when stored in humid conditions or washed.
- Fakes and dyed specimens are sold as natural colours.
Standards and interfaces required Filled
- Approval of mineral names and classification, Commission on New Minerals, Nomenclature and Classification of the International Mineralogical Association.
Context of use required Filled
- The halide class is encountered in mineral identification, geological surveys, museum collections and mineral classification systems.
- It groups mineral species by chemical composition and classification rules rather than by a shared outward appearance.
- The class supports organizing specimens and interpreting mineral occurrences, while preservation decisions require identification of the individual species.
Sources Filled
- Wikidata item Q729283: halide class of minerals - identity and sense of the item
- Wikipedia: Halide mineral - general description of the item
Open questions
- Which classification system and edition should govern this registry entry, and how should conflicting assignments be represented?
- What exact boundaries should apply to complex halides, oxyhalides, hydroxyhalides and mixed-anion species under that system?
- Which authoritative nomenclature records and classification references establish the intended member list?
- Which member-specific stability and analytical studies are sufficient to support preservation guidance without extrapolating across the class?
- Does an existing Vercy world model already cover this mineral class and require this registry entry to link to it?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q729283/spec.json