fourmarierite
Enable an agent to identify fourmarierite, assess the condition and evidence for a specimen, and decide which analytical, conservation or handling actions are justified.
Bundle → Layer → Finding → Questions Filled
6 bundles · 11 layers · 15 findings · 31 questions
Species and composition Resolve what qualifies as fourmarierite and how specimen chemistry supports that assignment.
Species reference
Anchor the registry concept to an explicit mineralogical definition.
Formula and name authority
Record the authoritative species reference and distinguish its formula from a specimen analysis.
- Which mineralogical authority and version establish the name and accepted formula for fourmarierite? definition
- Does the cited formula describe an ideal endmember or an accepted range of compositions? boundary
Domain chemistry
Evaluate lead, uranium and additional constituents in the proposed fourmarierite domain.
Composition and mixing
Test whether apparent deviations belong to the mineral or to inclusions, matrix and analytical limitations.
- What Pb:U atomic ratio and additional elements were measured, with what uncertainty? measurement
- Was the analytical volume confined to the same domain identified by diffraction? provenance
- What evidence separates intrinsic compositional variation from unresolved intergrowths? boundary
Structural identification Establish fourmarierite identity through crystallography and supporting observations.
Diffraction match
Compare the measured phase with traceable fourmarierite structural references.
Pattern and cell consistency
Assess the full available diffraction evidence while accounting for mixtures and crystallographic settings.
- Which reflections and refined cell parameters support fourmarierite, and which remain unexplained? measurement
- Which reference structure, axis setting and measurement conditions were used for comparison? provenance
- Could another lead uranyl phase or a multiphase mixture explain the pattern equally well? boundary
Supporting observations
Use morphology and optical or spectroscopic observations to corroborate a phase assignment.
Same-grain corroboration
Keep visual screening and auxiliary measurements tied to the grain actually analysed.
- What crystal habit, colour and optical observations were recorded for the identified grain? measurement
- Do available spectra have a validated fourmarierite reference and exclude signals from neighbouring grains? boundary
Occurrence and phase associations Locate fourmarierite within its specimen and geological alteration context.
Specimen occurrence
Tie the identified mineral domain to a traceable specimen and sampling location.
Locality and domain traceability
Preserve the connection between locality claims, specimen records and analytical subsamples.
- Which specimen record supports the stated locality, and how reliable is that attribution? provenance
- Where does the analysed fourmarierite domain occur in the specimen, and how much of the specimen does it represent? measurement
Alteration relationships
Separate observed contacts and replacement textures from inferred mineral succession.
Parent and neighbouring minerals
Record phase-resolved evidence for the mineral's geological setting.
- Which associated phases are analytically identified at contacts with fourmarierite? measurement
- What texture supports replacement of a parent phase rather than simple coexistence? boundary
- Does a historical gummite label describe the entire mixture or a specifically identified fourmarierite component? definition
Hydration and specimen condition Track whether storage and examination preserve the mineral domain being modelled.
Hydration evidence
Distinguish reference water content from measured hydration and possible analytical changes.
Water assignment and change
Record what constrains water and hydroxyl assignments without presuming unmeasured stability limits.
- Is water content measured directly, inferred from a structural model or assumed from the ideal formula? measurement
- Do before-and-after observations show a change following heating, vacuum exposure or irradiation by an analytical beam? measurement
Physical preservation
Assess the condition of crystals, coatings and aggregates before intervention.
Integrity and intervention
Link visible damage and prior treatments to the suitability of further analysis.
- Are the fourmarierite-bearing surfaces intact, fractured, shedding or coated with a treatment material? measurement
- What cleaning, mounting or storage history could have changed the surfaces now being examined? provenance
- Which proposed examination can answer the identification question while preserving the required mineral domain? action
Radiological and analytical decisions Connect specimen measurements and intended manipulations to handling decisions.
Specimen survey
Capture radiological observations at the scale and geometry relevant to the proposed task.
Radiation and contamination evidence
Keep external radiation measurements separate from evidence of transferable material.
- What radiation survey was performed, using which instrument, background, geometry and calibration? measurement
- What assessment establishes whether particles or surface contamination can transfer during the intended manipulation? measurement
- Can the measured response be attributed to fourmarierite, or does associated material contribute materially? boundary
Permitted manipulation
Resolve whether the evidence and applicable procedures support a specific analytical action.
Sampling and control decision
Tie decisions about mounting, sampling or destructive analysis to the actual specimen and facility.
- Does the proposed action detach, disperse, heat or dissolve fourmarierite-bearing material? action
- Which facility procedures and jurisdiction-specific requirements apply to this specimen and action? boundary
- What assessment or authorization remains necessary before the proposed manipulation can proceed? 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 fourmarierite 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 fourmarierite 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 fourmarierite 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 fourmarierite 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 fourmarierite 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
Fourmarierite is a secondary, orthorhombic lead uranyl oxide hydroxide hydrate mineral with ideal formula Pb(UO2)4O3(OH)4·4H2O, formed during alteration of uranium minerals.
In scope
- Species identity as a hydrated lead uranyl oxide-hydroxide
- Crystallographic and chemical identification of individual mineral domains
- Fourmarierite abundance and intergrowths within a specimen
- Hydration, surface alteration and physical integrity
- Geological provenance and relationships to associated uranium minerals
- Specimen-specific radiological assessment and analytical suitability
Out of scope
- The host rock or uranium deposit as a whole
- Uraninite and other associated mineral species
- Uranium extraction, refining and nuclear fuel production
- Commercial uranium or lead compounds and their product grades
- Collection ownership, trading and transport operations beyond linked requirements
Why it exists Filled
Enable an agent to identify fourmarierite, assess the condition and evidence for a specimen, and decide which analytical, conservation or handling actions are justified.
Distinguishing features Filled
- Test chemistry against the ideal formula Pb(UO2)4O3(OH)4·4H2O, including an ideal atomic Pb:U ratio of 1:4; elemental agreement alone does not establish species identity. Reference: [Piret, 1985](https://www.persee.fr/doc/bulmi_0180-9210_1985_num_108_5_7882).
- Require diffraction compatible with the reported orthorhombic structure, using the Bb21m setting explicitly when comparing crystallographic records. Reference: [Piret, 1985](https://www.persee.fr/doc/bulmi_0180-9210_1985_num_108_5_7882).
- Use red-orange to brown coloration and flattened, sometimes pseudohexagonal crystals as screening observations, not conclusive identification. Reference: [Handbook of Mineralogy](https://www.handbookofmineralogy.org/pdfs/fourmarierite.pdf).
- Distinguish candidate grains from accompanying curite, vandendriesscheite, becquerelite and schoepite through chemistry and diffraction on the same domain.
- Require evidence for a discrete fourmarierite phase before replacing a broad alteration-material label such as gummite with this species name.
What robots and AI may and may not do Filled
Must not
- Advise displaying it unshielded in homes or classrooms.
- Advise handling it without gloves and hand washing, given its lead and uranium content.
- Help ship or sell it without disclosing its radioactivity.
Only with a human decision
- Disposal or cross-border transfer of the specimen.
May
- Describe fourmarierite and its formation from mineralogical sources.
- Record a specimen's dose rate and storage location for its holder.
Moral aspects Filled
- It combines radiation with lead toxicity, a double hazard to holders.
- Children are especially vulnerable to both.
Who is affected
- Collectors and households
- Children
- Transport workers
Owners Filled
Steward
The person or collection that holds a specimen; radiation protection authorities regulate it.
Links to other meta-models Filled
parent
- Q13379369 - registry parent class
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.fourmarierite
- Wikidata: Q3749147 (https://www.wikidata.org/wiki/Q3749147)
Direct properties required Filled
- Mineral identification status: candidate | analytically supported | disputed | rejected
- Lead-to-uranium atomic ratio: dimensionless atomic ratio; ideal reference 0.25; report uncertainty
- Diffraction identification: Measured pattern linked to a cited fourmarierite reference, acquisition conditions and fit assessment
- Fourmarierite phase fraction: mass % or volume %, with method, sampling basis and uncertainty
- Water and hydroxyl evidence: reference-assumed | analytically constrained | changed during analysis | unresolved
- Surface and aggregate integrity: intact | fractured | friable | shedding | visibly altered
- Radiological survey result: Instrument-appropriate units, with background, geometry, distance, calibration and date
- Parent and associated phases: Linked mineral domains with observed contact or replacement relationships
Recognition required Filled
- Red to orange tabular crystals or crusts on altered uranium ore.
- Strongly radioactive; confirmed by analysis rather than colour.
Capabilities and actions required Filled
- Assess a fourmarierite identification against paired chemical and diffraction evidence.
- Select and document a mineral domain for confirmatory analysis.
- Separate specimen-wide measurements from measurements attributable to fourmarierite.
- Track changes in mineral surfaces and analytical signatures during storage or examination.
- Determine whether proposed sampling or manipulation has sufficient condition and radiological evidence.
- Link a confirmed occurrence to its specimen, locality and observed alteration relationships.
Hazards and failure modes required Filled
- Emits ionizing radiation and releases radon.
- Contains lead that is toxic if swallowed.
Standards and interfaces required Filled
- IAEA Safety Standards SSR-6, Regulations for the Safe Transport of Radioactive Material, International Atomic Energy Agency.
Context of use required Filled
- Fourmarierite occurs in altered uranium mineral deposits and may be encountered in geological samples, research collections and museum specimens.
- Its identification helps document secondary uranium mineral assemblages and interpret mineral alteration.
- Specimen assessment supports decisions about analysis, conservation and controls appropriate to uranium-bearing material.
Sources Filled
- Wikidata item Q3749147: fourmarierite - identity and sense of the item
- Wikipedia: Fourmarierite - general description of the item
Open questions
- What current authoritative treatment defines permitted lead deficiency, substitutions and formula variation within fourmarierite?
- Which validated diffraction and spectroscopic criteria best separate fourmarierite from closely intergrown lead uranyl alteration phases?
- What experimentally established humidity, temperature, vacuum and beam-exposure limits preserve fourmarierite without transformation?
- Which species-specific chemical identifiers or hazard records exist, and do they apply to natural mixed specimens rather than nominal pure compounds?
- What specimen-specific measurements are required to resolve radionuclide contributions, transferable contamination and applicable handling requirements?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q3749147/spec.json