carrollite
Enable an agent to recognize carrollite, assess the identity and condition of a carrollite-bearing specimen, and select justified analytical or handling actions.
Bundle → Layer → Finding → Questions Filled
6 bundles · 11 layers · 17 findings · 27 questions
Mineral identity Evidence that the registered thing is carrollite and that a particular specimen contains it.
Species reference
Connect the registry identity to an authoritative mineral description.
Reference composition
Record the reference formula and distinguish ideal composition from measured substitution.
- Which mineralogical reference defines carrollite for this identification? definition
- Does the formula describe an ideal end member or the measured composition of this specimen? boundary
Phase confirmation
Combine chemistry and structure at a compatible sampling scale.
Convergent identification
Assess whether composition and diffraction support the same carrollite phase.
- Which diffraction reference supports the identification, and which observed peaks remain unexplained? measurement
- Were chemistry and diffraction measured on the same grain or demonstrably equivalent material? provenance
Composition and substitution Resolve the chemistry of carrollite itself rather than the surrounding mineral mixture.
Grain chemistry
Retain quantitative analyses and their limitations.
Formula calculation
Derive a formula transparently from measured elemental concentrations.
- What Cu, Co, Ni, Fe, and S concentrations, uncertainties, and analytical totals were measured? measurement
- What normalization basis was used, and does normalization conceal a poor analytical total? measurement
Chemical heterogeneity
Distinguish variation within carrollite from contributions by other phases.
Substitution or mixture
Evaluate whether compositional variation belongs to a single mineral phase.
- Do elemental maps show nickel or iron distributed within the grain, in zones, or in discrete inclusions? measurement
- Which accepted species-boundary criteria apply if composition departs substantially from the carrollite reference? boundary
Specimen and associations Locate carrollite within a traceable specimen and its mineral assemblage.
Sample provenance
Connect analytical material to its collection and preparation history.
Traceable grain
Preserve the relationship between source specimen, subsample, and analyzed grain.
- Which specimen identifier, locality record, and collection evidence accompany this grain? provenance
- What separation, polishing, coating, or cleaning occurred before characterization? provenance
Mineral texture
Represent carrollite abundance and contacts with other phases.
Abundance and intergrowth
Record how much carrollite is present and whether it can be measured independently.
- What is the estimated carrollite fraction, and is it an area, volume, or mass fraction? measurement
- Which inclusions or contacting minerals are small enough to contaminate the analytical volume? boundary
Alteration and preservation Separate original carrollite from observed surface changes and replacement material.
Condition assessment
Document changes without assigning unverified reaction products.
Surface-interior difference
Compare surface films, fractures, and grain interiors using observations tied to location.
- What differences are observed between the surface and a fresh or polished interior? measurement
- Are suspected alteration products analytically identified or only inferred from appearance? boundary
Preservation decisions
Choose examination and storage actions using specimen-specific evidence.
Treatment justification
Assess whether preparation would remove diagnostic surfaces or modify the material being studied.
- Would cleaning or polishing erase a surface needed to investigate the specimen's alteration history? action
- What documented response to previous storage or treatment supports the next preservation action? provenance
Sampling and handling Connect proposed operations to material form, composition, and applicable evidence.
Analytical sampling
Select sufficient, representative material while retaining specimen value.
Sampling scale
Match sampling resolution to carrollite grain size and intergrowth.
- Can the identification be resolved on an existing grain or mount before consuming additional specimen material? action
- How will the selected material represent zoned grains or variable carrollite abundance? measurement
Operation-specific evidence
Require applicable evidence before grinding, heating, or chemical treatment.
Handling basis
Keep specimen-specific assessments distinct from classifications of other cobalt compounds or commercial mixtures.
- What handling evidence applies to this carrollite-bearing material, including its impurities and physical form? provenance
- What controls and waste route have been established for the proposed grinding, heating, or chemical treatment? action
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 carrollite 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 carrollite 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 carrollite 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 carrollite 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 carrollite 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 carrollite 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 carrollite 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
What it is Filled
Carrollite is a cubic copper-cobalt sulfide mineral with ideal formula CuCo2S4 and a spinel-type crystal structure, occurring in copper-cobalt ore deposits.
In scope
- Carrollite species identification and its distinction from related copper, cobalt, and nickel sulfides
- Measured composition, substitutions, and within-grain variability
- Crystal structure and diagnostic analytical evidence
- Carrollite abundance, grain associations, and provenance in specimens
- Observed alteration and evidence needed before sampling or treatment
Out of scope
- Whole-deposit geology, resource estimation, and mine operations
- Bulk ore or concentrate specifications beyond their carrollite component
- Industrial cobalt and copper extraction processes
- Separate mineral species occurring alongside carrollite
- Manufactured products containing synthetic copper-cobalt sulfides
Why it exists Filled
Enable an agent to recognize carrollite, assess the identity and condition of a carrollite-bearing specimen, and select justified analytical or handling actions.
Distinguishing features Filled
- Test individual grains for composition consistent with CuCo2S4, recording nickel substitution rather than requiring every natural specimen to match an ideal formula exactly. The Handbook expresses the composition as Cu(Co,Ni)2S4. [Handbook of Mineralogy](https://www.handbookofmineralogy.org/pdfs/carrollite.pdf)
- Require a carrollite-compatible diffraction pattern alongside composition; elemental detection of copper, cobalt, and sulfur alone does not establish a mineral phase.
- Distinguish carrollite from adjacent cobalt sulfides through grain-specific analysis; nickel-rich carrollite and linnaeite are documented together at Tsumeb. [Harvard Mineralogical Museum](https://tmn.fas.harvard.edu/objects/TSNB70)
- Separate a carrollite grain from a mixed copper-cobalt sulfide aggregate by testing whether the relevant elements occur within the same resolved phase.
- Treat metallic appearance and crystal habit as screening observations, with identification confidence determined by analytical evidence.
What robots and AI may and may not do Filled
Must not
- Help trade cobalt ore whose origin hides child labour or conflict financing.
- Help mine or collect without the rights holder's permission.
- Overstate the grade or origin of ore in reports.
Only with a human decision
- Certifying the origin of cobalt-bearing ore.
May
- Describe carrollite and its role as a copper-cobalt ore from mineralogical sources.
- Record assays and specimen data for an authorized survey or collection.
Moral aspects Filled
- Cobalt supply chains have involved child labour and dangerous artisanal mining.
- Mining for it affects local water, health and land.
Who is affected
- Mine workers including children
- Mining communities
- Buyers in the supply chain
Owners Filled
Steward
For deposits, the mineral rights holder under the mining authority; for specimens, their holder.
Master systems
- Mining cadastres and mineral rights registers
Links to other meta-models Filled
parent
- Q3777732 - registry parent class
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.carrollite
- Wikidata: Q1058717 (https://www.wikidata.org/wiki/Q1058717)
Direct properties required Filled
- Identification confidence: unexamined | provisional | analytically supported | conflicting
- Grain composition: Cu, Co, Ni, Fe, and S in mass percent, with uncertainty and analytical total
- Normalized formula: atoms per formula unit, with normalization basis stated
- Diffraction agreement: d-spacings in angstroms, relative intensities, reference identifier, and fit residual where available
- Carrollite abundance: mass percent | volume percent | mapped area percent, with method and sampling basis
- Grain size and intergrowth: micrometres or millimetres; resolved contacts and inclusions
- Associated phases: identified mineral links with contact, inclusion, or replacement relationships
- Surface and interior condition: apparently fresh | surface film observed | partly replaced | unresolved
- Material presentation: intact specimen | separated grain | polished mount | powder
Recognition required Filled
- Bright steel-grey metallic octahedral crystals that tarnish to a coppery colour.
- Found with other copper and cobalt sulfides; confirmed by analysis.
Capabilities and actions required Filled
- Assign or revise a carrollite identification using linked chemical and structural evidence.
- Choose grain-scale measurements that avoid inclusions and neighbouring sulfides.
- Estimate carrollite abundance while keeping mineral composition separate from bulk copper or cobalt grade.
- Compare fresh interiors with altered surfaces to identify what material an analysis represents.
- Select specimen-preserving examination or justified destructive sampling.
- Route powder preparation or chemical treatment for assessment using the actual specimen composition and proposed operation.
Hazards and failure modes required Filled
- Dust from cobalt ores is harmful to the lungs.
- Sulfide ores can release acid drainage when weathered.
Standards and interfaces required Filled
- The spinel supergroup nomenclature approved by the International Mineralogical Association Commission on New Minerals, Nomenclature and Classification places carrollite in the thiospinel group.
Context of use required Filled
- Carrollite is encountered in copper-cobalt ore deposits, geological collections and mineralogical research.
- Geologists and materials analysts study it to identify cobalt-bearing mineral phases and understand ore composition and processing behaviour.
Sources Filled
- Wikidata item Q1058717: carrollite - identity and sense of the item
- Wikipedia: Carrollite - general description of the item
Open questions
- Which current mineral nomenclature criteria delimit nickel- and iron-bearing carrollite from neighbouring sulfide species?
- Which validated chemical and diffraction references provide acceptance criteria across natural compositional variation?
- Which registry identifiers, if any, unambiguously refer to carrollite rather than a synthetic compound or mineral mixture?
- What experimentally established alteration and thermal-transformation conditions apply to characterized carrollite specimens?
- Which carrollite-specific handling classifications and exposure evidence are available, and where must assessment remain specific to the specimen and operation?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q1058717/spec.json