crystal
Enable an AI agent to recognise a crystal, assess its structural and physical state, and select handling, characterisation or transformation actions consistent with its material properties and intended use.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
Researched by: Codex
Purpose and description
Enable an AI agent to recognise a crystal, assess its structural and physical state, and select handling, characterisation or transformation actions consistent with its material properties and intended use.
It can be Select characterisation methods to resolve crystallinity, phase, orientation or defects.; Orient and mount the crystal for a direction-sensitive measurement or application.; Choose cutting or polishing regions and directions using established orientation and fracture evidence.; Set storage, cleaning and exposure conditions from demonstrated material compatibility.; Assess whether a proposed thermal, mechanical or chemical treatment preserves the required crystalline state.; Allocate suitable regions to use or sampling while retaining the relationship between fragments and the original crystal..
Distinguishing features
Require structural evidence of crystalline order rather than accepting a faceted outline, transparency or a seller's use of the word crystal.
Distinguish one crystal from a polycrystalline specimen by examining orientation continuity and boundaries across the declared extent.
Distinguish phases with similar composition through structural evidence rather than composition alone.
Separate external habit from internal structure: a broken or rounded specimen may retain crystalline order, while a moulded faceted object may lack it.
Check whether the referent is a physical crystalline solid, a material containing crystalline regions, or a product merely named crystal.
Scope
+ Evidence of crystalline order and identification of the crystalline phase
+ Composition, impurities, inclusions and spatial variation within the crystal
+ Lattice orientation, external faces, twinning and boundaries between domains
+ Defects, fractures and direction-dependent properties relevant to use
+ Growth and treatment history, present stability and permissible interventions
- Bulk rocks, ores and composite materials containing multiple constituent crystals
- Molecules, ions or chemical substances independently of their crystalline form
- Finished electronic, optical or mechanical devices incorporating crystals
- Gemstone valuation, jewellery design and commercial grading systems
- Solutions, melts and process equipment used to grow crystals
Characteristics
- Crystallinity evidence
- Method, observation, sampled region and confidence; confirmed, provisional or unresolved Determines whether the referent qualifies and how much confidence subsequent decisions deserve.
- Composition and phase assignment
- Measured composition and proposed phase or polymorph, with method and uncertainty Similar compositions can require different structural interpretations and handling decisions.
- Domain organisation
- Single domain, twinned, intergrown, polycrystalline or unresolved Establishes whether one orientation and one crystal boundary adequately describe the specimen.
- Lattice parameters
- Lengths in angstroms or nanometres and angles in degrees, with temperature, pressure and uncertainty Supports phase identification and comparison of structural states.
- Orientation relative to specimen
- Crystallographic directions and planes mapped to a declared specimen coordinate frame Makes cutting, loading and optical measurements directionally interpretable.
- External habit and dimensions
- Dimensions in millimetres or micrometres; observed face geometry and indexed faces where established Constrains mounting, accessible measurement regions and available material.
- Defect and inclusion distribution
- Observed defect types, locations and extent, with detection limits Helps explain local property variation and identify regions unsuitable for use.
- Fracture and surface condition
- Mapped cracks, chips, alteration, coatings and surface damage Constrains handling, preparation and interpretation of surface measurements.
- Directional functional response
- Property-specific units, crystallographic direction, conditions and uncertainty Supports use decisions without assuming that every crystal has the same optical, electrical or mechanical behaviour.
- Environmental stability
- Observed response and supported limits for temperature, pressure, humidity, solvents and radiation Determines storage and intervention conditions that preserve the required phase and condition.
- Growth and treatment history
- Links to origin, growth, irradiation, heating, cutting, polishing and coating records Connects the present structure and condition to processes that may have changed them.
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.crystal-artifact
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 5 bundles · 10 layers · 10 findings · 20 questions.
Crystalline identity Establish what qualifies the referent as a crystal and which material phase it represents.
Appearance and material names alone cannot establish crystalline identity or distinguish structurally different forms.
Evidence of order
Record the observations supporting crystalline order within a declared sampled region.
Crystallinity assignment
Separate an observed structural signature from an inferred or untested identification.
- What observation supports crystalline order, and what method and interpretation produced that conclusion? definition
- Which volume or surface region was examined, and could unexamined regions have a different structural state? boundary
Composition and phase
Connect chemical composition to a supported structural phase assignment.
Phase identification
Record the proposed phase, supporting measurements and unresolved alternatives.
- Which composition and structural measurements distinguish the proposed phase from plausible polymorphs or other materials? measurement
- Which reference or analysis supports the assignment, and under what temperature and pressure was it established? provenance
Lattice, domains and form Relate internal crystallographic organisation to the physical extent and faces of the specimen.
An agent must know when one lattice orientation describes the object and how that orientation maps to accessible surfaces.
Domain continuity
Resolve the boundaries and orientation relationships of crystalline domains.
Crystal extent
Declare whether the model refers to a whole specimen, one grain or an explicitly related set of domains.
- What evidence establishes orientation continuity across the extent called this crystal? measurement
- Do twins, intergrowths or grain boundaries require separately described domains within or outside this model? boundary
Orientation and habit
Map lattice directions and planes onto specimen geometry without treating habit as structural proof.
Crystallographic frame
Maintain a usable relationship between crystallographic coordinates, observed faces and specimen landmarks.
- How were lattice parameters, orientation and any face indices determined, and with what uncertainty? measurement
- Which landmarks allow an agent to recover that orientation after mounting, cutting or transferring the specimen? action
Imperfections and integrity Describe departures from the assigned structure and damage that affects usable regions.
A phase label alone does not reveal whether a particular crystal region is homogeneous, intact or suitable for an intended operation.
Internal heterogeneity
Locate defects, compositional zoning and inclusions at the resolution relevant to use.
Defect and inclusion map
Distinguish observed imperfections from undetected or merely suspected ones.
- Which defects, impurities, inclusions or compositional gradients were detected, where are they, and what are the method's detection limits? measurement
- Which affected regions remain usable for the proposed optical, electrical, mechanical or structural purpose? action
Fracture and surface
Assess cracks, cleavage evidence and preparation or alteration of exposed surfaces.
Integrity assessment
Relate observed damage and surface condition to likely preparation and handling constraints.
- Where are cracks, chips, altered regions or coatings, and how do they relate to established crystallographic planes? measurement
- What evidence supports a safe mounting, gripping, cutting or polishing approach for this specimen? action
Directional properties and use Connect measured crystal responses to the orientation, conditions and tolerances required by a proposed use.
Crystal behaviour may depend on direction, phase and defects, so generic material properties cannot automatically justify a specimen-level decision.
Property characterisation
Record only those optical, electrical, thermal or mechanical responses relevant to the intended decision.
Conditioned property measurements
Tie each property value to its measurement direction, conditions and region.
- Which property must be known for the intended use, and in which lattice direction, spectral range or operating conditions? definition
- Was the value measured on this crystal or transferred from a reference, and what limits that transfer? provenance
Fitness for operation
Translate measured properties and spatial variation into a bounded use decision.
Usable region and orientation
Identify the part and orientation of the crystal that can meet stated performance requirements.
- Which region and orientation meet the required property tolerances, dimensions and defect limits? boundary
- What additional measurement or preparation is necessary before assigning this crystal to that operation? action
Stability and transformation Track how origin, exposure and intervention affect the crystal's phase, structure and condition.
Actions can change or destroy the crystalline state on which identification and use decisions depend.
Growth and treatment
Connect the current crystal to documented formation and subsequent modifications.
Structural history
Record known growth and treatment events while separating documented history from interpretations of appearance.
- What records establish natural or synthetic origin, growth conditions and subsequent thermal, chemical, mechanical or radiation treatments? provenance
- Which current phase assignments, defect patterns or property measurements may reflect those events? measurement
Exposure and intervention
Establish conditions and checks for preserving or deliberately changing the crystalline state.
Supported operating envelope
Distinguish demonstrated stability limits from unknown responses to proposed exposures.
- What evidence bounds acceptable temperature, pressure, humidity, solvent and radiation exposure for the required phase and condition? boundary
- Before cleaning, heating, dissolving, cleaving or otherwise transforming the crystal, what outcome is intended and what verification will detect an unacceptable change? action
What the second pass must settle
- Does the registry intend crystal to include quasicrystals and other nonperiodic ordered solids, and which operational definition should govern that boundary?
- Should twinned crystals, intergrowths and crystalline aggregates be represented as one thing with domains or linked things under neighbouring models?
- Which existing Vercy world models already own crystal, crystalline phase, mineral specimen or grain, and should this entry link to one of them?
- What minimum evidence and confidence are sufficient to recognise a crystal when structural measurements are unavailable or destructive sampling is unacceptable?
- Which intended uses should determine the required property measurements, defect resolution and stability evidence?