{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.epistilbite","code":"thing-q736825","url":"https://ver.cy/models/thing/q736825/","name":"epistilbite","alternateNames":[],"kind":"thing","status":"published","version":"0.1.0-research.1","language":"en","classifiers":{"family":"Thing Registry","category":"Physical world and living systems","entryKind":"thing","plane":"PHY","domain":["PHY.MAT"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"Epistilbite is a hydrated calcium aluminosilicate mineral of the zeolite group, ideally CaAl2Si6O16·5H2O, with an open framework that accommodates water and exchangeable cations.","purpose":"Enable an agent to identify epistilbite, assess the composition and condition of a specimen, and select justified characterization, preservation or experimental actions.","scope":{"in":["Epistilbite identification and exclusion of visually similar zeolites","Framework structure, symmetry, twinning and structural disorder","Measured composition, hydration and mineral-phase purity","Crystal condition, geological occurrence and specimen provenance","Evidence supporting preservation, sampling and material-performance experiments"],"out":["Zeolites as an entire mineral family","Stilbite, goosecreekite and other separate mineral identities","The complete host rock, deposit or geological formation","Industrial adsorbent products containing epistilbite","Synthesis, mining and analytical instruments as independently modeled processes or devices"],"boundaries":[]},"distinguishingFeatures":["Require diffraction evidence consistent with the EPI framework; a zeolite label or similar crystal habit is insufficient. [IZA structure reference](https://europe.iza-structure.org/IZA-SC/material_tm.php?ID=81)","Check calcium-bearing aluminosilicate chemistry against the reference framework ratio Si:Al = 3:1, while retaining measured substitutions and analytical uncertainty. [IZA reference composition](https://europe.iza-structure.org/IZA-SC/material_tm.php?ID=81)","Separate epistilbite from goosecreekite through structure-sensitive measurements rather than nominal composition alone; the Handbook describes them as dimorphs. [Handbook of Mineralogy](https://www.handbookofmineralogy.org/pdfs/epistilbite.pdf)","Use hardness near Mohs 4, density around 2.22-2.28 g/cm³ and perfect {010} cleavage as supporting checks, not standalone identification. [Handbook of Mineralogy](https://www.handbookofmineralogy.org/pdfs/epistilbite.pdf)"],"structure":{"bundles":[{"id":"mineral-identity","name":"Mineral identity","description":"Establish whether a specimen merits identification as epistilbite.","layers":[{"id":"identity-anchor","name":"Identity anchor","description":"Connect the registry identity to mineralogical references and specimen labels.","findings":[{"id":"species-reference","name":"Species reference","description":"Record the nomenclatural reference used and distinguish its accepted identity from historical or vendor wording.","questions":[{"text":"Which mineralogical authority and version establish the epistilbite identity used for this specimen?","id":"species-reference-q01","kind":"definition"},{"text":"Who assigned the specimen label, and what analytical evidence accompanied that assignment?","id":"species-reference-q02","kind":"provenance"}]}]},{"id":"competing-identifications","name":"Competing identifications","description":"Resolve confusion with similar zeolites using complementary evidence.","findings":[{"id":"differential-identification","name":"Differential identification","description":"Require an explicit comparison with plausible alternatives, particularly stilbite and goosecreekite.","questions":[{"text":"Which measured diffraction features distinguish this sample from stilbite and goosecreekite?","id":"differential-identification-q01","kind":"measurement"},{"text":"Could the appearance or chemical analysis represent an intergrowth rather than one epistilbite phase?","id":"differential-identification-q02","kind":"boundary"},{"text":"What additional measurement would resolve the strongest remaining alternative identification?","id":"differential-identification-q03","kind":"action"}]}]}]},{"id":"framework-and-crystal-architecture","name":"Framework and crystal architecture","description":"Represent EPI topology separately from the symmetry and domain structure observed in a particular crystal.","layers":[{"id":"framework-evidence","name":"Framework evidence","description":"Link the EPI assignment to reproducible diffraction observations.","findings":[{"id":"diffraction-fit","name":"Diffraction fit","description":"Record reference structure, measurement conditions and mismatches rather than only a database match label.","questions":[{"text":"Which reference structure and diffraction dataset support the EPI assignment?","id":"diffraction-fit-q01","kind":"provenance"},{"text":"Which reflections remain unexplained after accounting for preferred orientation and associated phases?","id":"diffraction-fit-q02","kind":"measurement"}]}]},{"id":"symmetry-and-domains","name":"Symmetry and domains","description":"Capture the actual structural model warranted by the crystal examined.","findings":[{"id":"symmetry-resolution","name":"Symmetry resolution","description":"Separate apparent habit, twinning and average symmetry from a refined structural assignment.","questions":[{"text":"Which crystal system, space group and cell setting fit this specimen's data, and with what uncertainty?","id":"symmetry-resolution-q01","kind":"measurement"},{"text":"Does the proposed symmetry describe an average structure, individual domains or an explicitly twinned refinement?","id":"symmetry-resolution-q02","kind":"definition"},{"text":"What evidence supports Si/Al ordering or domain disorder in this specimen?","id":"symmetry-resolution-q03","kind":"measurement"}]}]}]},{"id":"composition-and-hydration","name":"Composition and hydration","description":"Describe framework chemistry, extra-framework cations and water on explicit analytical bases.","layers":[{"id":"framework-and-cation-chemistry","name":"Framework and cation chemistry","description":"Assess the chemical compatibility of the identified mineral phase.","findings":[{"id":"normalized-analysis","name":"Normalized analysis","description":"Retain measured oxide totals, formula normalization and charge-balance checks.","questions":[{"text":"What Si, Al, Ca, Na and K abundances were measured on the identified epistilbite grain?","id":"normalized-analysis-q01","kind":"measurement"},{"text":"Which oxygen basis and water assumptions were used to calculate the formula?","id":"normalized-analysis-q02","kind":"definition"},{"text":"Do analytical uncertainty and phase contamination explain any apparent charge imbalance?","id":"normalized-analysis-q03","kind":"boundary"}]}]},{"id":"water-state","name":"Water state","description":"Distinguish reference water stoichiometry from measured water in conditioned material.","findings":[{"id":"hydration-accounting","name":"Hydration accounting","description":"Record water measurements and environmental history without assigning every mass loss to framework-associated water.","questions":[{"text":"What water content was measured, on which formula basis and after what conditioning?","id":"hydration-accounting-q01","kind":"measurement"},{"text":"How were surface moisture and contributions from other phases separated from epistilbite-associated water?","id":"hydration-accounting-q02","kind":"boundary"},{"text":"Does re-equilibration restore both the initial water content and diffraction pattern?","id":"hydration-accounting-q03","kind":"measurement"}]}]}]},{"id":"occurrence-and-specimen-quality","name":"Occurrence and specimen quality","description":"Connect geological context, phase mixtures and physical condition to the material actually examined.","layers":[{"id":"geological-context","name":"Geological context","description":"Preserve locality and occurrence evidence at the specimen level.","findings":[{"id":"occurrence-record","name":"Occurrence record","description":"Connect host material and associated minerals to documented observations.","questions":[{"text":"Which locality, host rock and cavity or vein context are documented for this specimen?","id":"occurrence-record-q01","kind":"provenance"},{"text":"Which associated minerals were analytically identified, and which were assigned visually?","id":"occurrence-record-q02","kind":"measurement"}]}]},{"id":"phase-purity-and-integrity","name":"Phase purity and integrity","description":"Determine whether the chosen material represents epistilbite adequately for the intended analysis.","findings":[{"id":"representative-sampling","name":"Representative sampling","description":"Assess intergrowths, matrix, coatings and damage before selecting analytical material.","questions":[{"text":"What epistilbite fraction and accessory phases occur in the proposed aliquot, with what detection limits?","id":"representative-sampling-q01","kind":"measurement"},{"text":"Which fractures, cleavage surfaces or coatings could compromise the intended measurement?","id":"representative-sampling-q02","kind":"measurement"},{"text":"Which sampling location best represents the target phase while preserving significant crystal features?","id":"representative-sampling-q03","kind":"action"}]}]}]},{"id":"preservation-and-functional-testing","name":"Preservation and functional testing","description":"Support defensible handling decisions and experiments on conditioned epistilbite.","layers":[{"id":"conditioning-and-preservation","name":"Conditioning and preservation","description":"Evaluate proposed interventions against crystal integrity and hydration evidence.","findings":[{"id":"intervention-response","name":"Intervention response","description":"Track changes following mounting, cleaning, drying or heating.","questions":[{"text":"Which previous treatments may have changed the crystal surface, hydration or diffraction response?","id":"intervention-response-q01","kind":"provenance"},{"text":"What specimen-specific evidence supports the proposed cleaning, mounting or conditioning procedure?","id":"intervention-response-q02","kind":"action"},{"text":"Which before-and-after observations would reveal cleavage damage or irreversible structural change?","id":"intervention-response-q03","kind":"measurement"}]}]},{"id":"measured-functional-behavior","name":"Measured functional behavior","description":"Evaluate adsorption and exchange behavior without inferring performance from the zeolite label.","findings":[{"id":"performance-attribution","name":"Performance attribution","description":"Tie any functional result to phase purity, conditioning, test conditions and structural retention.","questions":[{"text":"What adsorption or ion-exchange response was measured for the specified species, temperature and solution or gas conditions?","id":"performance-attribution-q01","kind":"measurement"},{"text":"How were contributions from matrix minerals, accessory phases and external surface adsorption excluded?","id":"performance-attribution-q02","kind":"boundary"},{"text":"What post-test analysis establishes whether epistilbite retained its identity and can undergo another cycle?","id":"performance-attribution-q03","kind":"action"}]}]}]},{"id":"evidence-and-external-alignment","name":"Evidence and external alignment","description":"What the world already says about this thing, gathered so the model can be checked against it.","layers":[{"id":"reported-evidence","name":"Reported evidence","description":"Findings from the breadth pass, kept separate from the structural claims.","findings":[{"id":"evidence-confidence-notes","name":"Check these first","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these check these first hold for the sense of epistilbite this model covers, and on what evidence?","id":"evidence-confidence-notes-q01","kind":"provenance"}]},{"id":"evidence-identifiers","name":"Identifiers and schemes","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these identifiers and schemes hold for the sense of epistilbite this model covers, and on what evidence?","id":"evidence-identifiers-q01","kind":"provenance"}]},{"id":"evidence-real-world-use","name":"Real-world use","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these real-world use hold for the sense of epistilbite this model covers, and on what evidence?","id":"evidence-real-world-use-q01","kind":"provenance"}]},{"id":"evidence-measurements","name":"Typical measurements","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these typical measurements hold for the sense of epistilbite this model covers, and on what evidence?","id":"evidence-measurements-q01","kind":"provenance"}]},{"id":"evidence-failure-modes-and-hazards","name":"Failure modes and hazards","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these failure modes and hazards hold for the sense of epistilbite this model covers, and on what evidence?","id":"evidence-failure-modes-and-hazards-q01","kind":"provenance"}]},{"id":"evidence-neighbours","name":"Neighbouring kinds and how to tell them apart","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these neighbouring kinds and how to tell them apart hold for the sense of epistilbite this model covers, and on what evidence?","id":"evidence-neighbours-q01","kind":"provenance"}]}]}]}]},"agentConduct":{"may":["Identify a specimen as epistilbite from documented analysis and setting.","Report its condition and whether it shows signs of dehydration."],"mustNot":["Label a zeolite as epistilbite from form alone without analysis.","Recommend cleaning with acids or heat that damage the specimen.","Present a specimen with false locality data.","Collect from protected sites or private land without permission."],"requiresHuman":["Destructive testing of a specimen requires human authorization.","Collecting on private land requires permission from the owner, and collecting at protected sites requires authorization from the responsible authority."]},"ethics":{"considerations":["Accurate identification matters to the scientific record of zeolites.","Collecting can damage geological heritage sites."],"affectedParties":["Researchers","Collectors","Site owners"]},"owners":{"steward":"The collector or museum that holds the specimen.","roles":[],"masterSystems":["Museum mineral collection catalogues","Mineral species databases"]},"relations":[{"target":"Q13402560","type":"parent","note":"registry parent class"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.epistilbite","Wikidata: Q736825 (https://www.wikidata.org/wiki/Q736825)"]},"properties":{"applicability":"required","items":["Identification confidence: unverified label | provisional identification | analytically supported | conflicting evidence","Framework assignment: EPI supported | alternative framework | unresolved","Normalized chemical composition: oxide wt%; atoms per formula unit with explicit oxygen basis; Si/Al molar ratio","Water content: H2O wt% and molecules per stated formula basis, with temperature and humidity history","Crystallographic refinement: reported crystal system, space group, cell setting and refinement reference","Epistilbite phase fraction: wt% with method, uncertainty and detection limits","Crystal integrity: intact | cleaved | fractured | powdered | altered; supporting observations","Occurrence association: linked locality, host rock, cavity or vein, and associated mineral identifications","Treatment history: dated heating, drying, washing, chemical exposure, coating and grinding events"]},"recognition":{"applicability":"required","items":["Colourless to white prismatic crystals, often in radiating groups in volcanic cavities.","Glassy lustre on crystal faces.","Distinguishing it from similar zeolites requires analysis."]},"capabilities":{"applicability":"required","items":["Compare specimen diffraction and composition with epistilbite references and record unresolved alternatives.","Select a representative crystal or mineral separate for analysis while documenting material consumed.","Track hydration and structural changes during controlled conditioning experiments.","Choose mounting and storage conditions using observed cleavage, fragility and treatment history.","Evaluate adsorption or ion-exchange claims through specimen-specific experiments.","Associate geological and collection records with the precise crystal or powder aliquot examined."]},"hazards":{"applicability":"required","items":["Confusion with heulandite, stilbite or other zeolites.","Damage by acid cleaning or dehydration."]},"interfaces":{"applicability":"required","items":["Mineral nomenclature approved by the Commission on New Minerals, Nomenclature and Classification, International Mineralogical Association."]},"context":{"applicability":"required","items":["Epistilbite is encountered in mineral collections and geological studies of zeolite-bearing rocks, including crystals lining cavities in volcanic rocks.","It is studied to understand hydrated aluminosilicate frameworks, mineral formation and the behaviour of framework water and exchangeable cations."]}},"sources":[{"title":"Wikidata item Q736825: epistilbite","url":"https://www.wikidata.org/wiki/Q736825","note":"identity and sense of the item"},{"title":"Wikipédia: Épistilbite","url":"https://fr.wikipedia.org/wiki/Épistilbite","note":"The mineral epistilbite and its mineralogical properties."}],"openQuestions":["How should the model reconcile the Handbook's CaAl2Si6O16·5H2O representation with the IZA reference Ca3[Al6Si18O48]·16H2O, while preserving source conventions and measured hydration?","Which symmetry and domain descriptions are appropriate for different epistilbite specimens, and what minimum evidence warrants each assignment?","What temperature, humidity and exposure-duration ranges preserve epistilbite structure, and when are dehydration changes reversible?","Which adsorption or ion-exchange capabilities have been demonstrated on well-characterized epistilbite rather than inferred from other zeolites?","Which chemical identifiers and handling classifications are demonstrably applicable to natural epistilbite, and which instead describe a mixture, commercial product or broader zeolite category?"],"resources":{"spec":"/models/things/publications/thing-q736825/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q736825/spec.json"],"providers":["Codex"],"researchStatus":"unreviewed","generatedAt":"2026-09-12T09:31:10Z","builder":"tools/build_cards.py@1.0.0"},"completeness":{"sections":{"classifiers":"filled","whatItIs":"filled","purpose":"filled","distinguishingFeatures":"filled","structure":"filled","agentConduct":"filled","ethics":"filled","owners":"filled","relations":"filled","interaction.identity":"filled","interaction.properties":"filled","interaction.recognition":"filled","interaction.capabilities":"filled","interaction.hazards":"filled","interaction.interfaces":"filled","interaction.context":"filled","sources":"filled"},"notes":{"_gate":"Published through the thing publication gate 1.0 on 2026-10-08T18:54:40+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass"},"score":1.0}}