dolomite
Enable an AI agent to recognise dolomite, assess the condition and suitability of a specimen or material lot, and identify what evidence is needed before use or processing.
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.
recalled by Codex without web access - no source was read
Researched by: Codex
Purpose and description
Enable an AI agent to recognise dolomite, assess the condition and suitability of a specimen or material lot, and identify what evidence is needed before use or processing.
Dolomite is a trigonal carbonate mineral with ideal composition CaMg(CO3)2 and ordered calcium and magnesium layers in its crystal structure; the same name is also used for rock composed predominantly of this mineral.
It can be Request or evaluate mineral-phase testing when a dolomite label is unsupported.; Compare a characterised lot against an application-specific composition and particle-size specification.; Select representative sampling and additional impurity tests where existing evidence is insufficient.; Assess whether grinding, washing or separation could achieve a specified physical grade.; Track dissolution or thermal processing and transfer transformed material to the appropriate neighbouring model.; Derive handling requirements from the actual composition, particle form, intended operation and applicable evidence..
Distinguishing features
Require mineral-phase evidence to distinguish dolomite from calcite, magnesite or mixtures with similar bulk chemistry.
Check whether calcium and magnesium occur in the identified dolomite phase rather than merely in separate constituents of the sample.
Separate a dolomite mineral identification from a rock or commercial material described as dolomite; record the proportion and identity of accompanying phases.
Use evidence of carbonate retention and phase identity to distinguish dolomite from calcined or otherwise transformed products.
Treat appearance and acid-response observations as supporting evidence whose test conditions must be recorded, rather than conclusive identification.
Scope
+ Mineral identity, nominal calcium-magnesium carbonate composition and evidence of phase identification
+ Composition departures, associated minerals, impurities and declared grade
+ Crystal structure, grain properties and physical condition
+ Provenance, sampling and the representativeness of analytical results
+ Suitability for an intended use, processing response and sample-specific handling constraints
- Dolostone formations, stratigraphy and deposit-scale geological models
- Calcite, magnesite and other carbonate minerals as independently modelled substances
- Quarry operations and mineral-processing equipment
- Concrete, soil amendments, refractory products and other formulations containing dolomite
- Dolomitic lime and other products created by chemical transformation
Characteristics
- Referent and material form
- mineral specimen | separated mineral grains | powder | dolomite-bearing rock | commercial mixture | unresolved Prevents properties of the mineral from being assigned automatically to a rock or supplied product.
- Mineral-phase identification
- unverified | provisionally identified | analytically supported | conflicting evidence; method and report required Controls whether subsequent assessments can rely on the dolomite identity.
- Dolomite phase fraction
- mass %, with analytical method, uncertainty and reporting basis Distinguishes mineral-rich material from mixtures and supports grade assessment.
- Calcium-to-magnesium ratio
- mol/mol, identifying whether measured in bulk material or the dolomite phase Helps assess composition while avoiding identification from bulk chemistry alone.
- Associated minerals and impurities
- phase names with mass %; elemental concentrations in mg/kg or mass %, including detection limits Accompanying phases can change performance, processing behaviour and handling requirements.
- Crystal structure and ordering evidence
- uncharacterised | characterised; diffraction interpretation and applicable ordering metric Supports distinction from related carbonate phases and interpretation of composition.
- Particle-size distribution
- µm or mm; sieve fractions or distribution percentiles with method Affects dissolution, processing, segregation and the potential to generate airborne dust.
- Moisture content
- mass %, with wet- or dry-basis convention and measurement conditions Changes mass-based composition comparisons, flow behaviour and dosing.
- Density or bulk density
- kg/m³, distinguishing particle density from loose or compacted bulk density Prevents packing-dependent measurements from being mistaken for mineral properties.
- Dissolution or neutralisation performance
- reported test metric with units, particle size, solution composition, temperature and duration Makes reactivity evidence usable for a particular application.
- Thermal transformation state
- no transformation detected | partially transformed | transformed | unknown; supporting phase analysis Determines whether the material remains within the dolomite mineral model.
- Lot and analytical provenance
- links to source locality or supplier, lot, sample, preparation record and analytical report Defines which material an observation actually describes.
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.dolomite
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 5 bundles · 9 layers · 16 findings · 31 questions.
Dolomite identity Establishes what the name denotes and whether mineralogical evidence supports it.
Dolomite can label a mineral, a rock or a commercial material, and those referents support different conclusions.
Name and referent
Resolves the mineral sense against geological and commercial usage.
Dolomite referent
Record the entity being identified and the evidence connecting its supplied label to the mineral sense.
- Does dolomite denote a mineral phase, a specimen, a dolomite-bearing rock or a supplied mixture in this record? definition
- Which rock or product record should own properties that describe the whole material rather than its dolomite constituent? boundary
Phase identification
Tests the identification against closely related carbonate phases.
Carbonate phase evidence
Record analytical support for dolomite and the limitations of observations used to identify it.
- What phase-sensitive analysis distinguishes this material from calcite, magnesite and mixtures of carbonate minerals? measurement
- Do composition and structural evidence agree, and what uncertainty remains about related or substituted carbonate phases? boundary
- Which sample, laboratory report and preparation method support the identification? provenance
Composition and grade Separates the dolomite phase's composition from the composition of the containing material.
Bulk calcium and magnesium measurements alone cannot establish mineral purity or fitness for use.
Phase composition
Characterises calcium, magnesium and other constituents within the identified mineral phase.
Composition basis
Record phase-specific chemistry and distinguish it from whole-sample elemental or oxide-equivalent reporting.
- What calcium-to-magnesium ratio was measured, and does it describe individual dolomite grains or the bulk sample? measurement
- Which additional elements are assigned to the dolomite structure, and which are attributed to accompanying phases? measurement
- Are reported percentages elemental, carbonate-based or oxide-equivalent, and are they on a dry basis? definition
Associated phases and specification
Connects mineral proportions and impurity measurements to a declared material grade.
Grade evidence
Record the measured mineral assemblage and the exact specification under which a grade is claimed.
- What proportions of dolomite, other carbonates and non-carbonate phases are present, with what detection limits? measurement
- Which intended-use specification defines acceptable impurities and minimum dolomite content for this lot? action
- How was the sample selected to represent variation across the lot or source material? provenance
Physical state and reactivity Records the physical form and condition-dependent response of dolomite material.
A crystal, coarse aggregate and fine powder can share a mineral identity while behaving differently in use.
Grain and bulk condition
Characterises grain size, moisture, packing and observable alteration.
Physical condition evidence
Record properties at the specimen, particle or bulk scale without conflating those scales.
- What particle-size distribution, moisture content and agglomeration state describe the material as supplied? measurement
- Do density and porosity measurements describe mineral grains, rock fragments or a packed powder? boundary
- What evidence indicates surface coatings, weathering or contamination that could affect testing or use? measurement
Dissolution and heating
Characterises reaction behaviour under specified chemical and thermal conditions.
Reaction and transformation evidence
Record observed responses and resulting phases rather than assigning an unconditional reactivity or transition temperature.
- Under what solution composition, temperature, duration and particle size was dissolution or neutralisation measured? measurement
- What heating conditions and atmosphere were used, and what mass changes and resulting phases were observed? measurement
- At what observed transformation should the output be represented as a reaction product rather than unchanged dolomite? boundary
Use and handling decisions Connects verified lot properties to application requirements and handling evidence.
A dolomite identity alone does not establish suitability, product classification or acceptable operating conditions.
Application fit
Evaluates a specific material against the requirements of its proposed use.
Application acceptance
Record application-specific acceptance criteria and the tests needed to establish compliance.
- For the proposed use, which composition, particle-size and performance requirements must this dolomite lot meet? action
- Which requirements are supported by representative test results, and which require further testing? measurement
- Would the proposed treatment change only physical grade, or create a chemically different material requiring another model? boundary
Handling and declared identity
Associates substance identifiers and handling requirements with the actual supplied material and operation.
Material-specific handling evidence
Record verified identifier mappings, supplier documentation and exposure-relevant constituents without assuming all dolomite materials share one classification.
- Which CAS, EC or other identifiers are documented, and do they refer to the mineral substance or the supplied mixture? provenance
- What evidence establishes dust characteristics and the presence or absence of crystalline silica or other relevant impurities? measurement
- Which current classification, exposure limits and controls apply to this material, operation and jurisdiction? action
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.
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.
- The registry has no recorded sense; confirm whether it intends the mineral, the rock, or a commercial material.
- Values given describe the mineral or its ideal formula, not the bulk density or composition of a quarried product.
- This is recalled knowledge without source verification; verify the CAS assignment and any application-specific specifications before publication.
- Which of these check these first hold for the sense of dolomite this model covers, and on what evidence? provenance
Kinds and varieties
Recalled without web access and unsourced; every item is a lead to verify.
- Ferroan dolomite
- Manganese-bearing dolomite
- Which of these kinds and varieties hold for the sense of dolomite this model covers, and on what evidence? provenance
Identifiers and schemes
Recalled without web access and unsourced; every item is a lead to verify.
- CAS Registry Number - 16389-88-1 - Identifies dolomite; a commercial dolomitic material may contain additional mineral phases.
- Chemical formula - CaMg(CO3)2 - Ideal mineral composition; natural samples may contain substitutions and impurities.
- Which of these identifiers and schemes hold for the sense of dolomite this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Dolomite-rich rock is used as construction aggregate and building stone.
- Ground dolomitic material is used to neutralize acidic soils and supply calcium and magnesium.
- Dolomite is used as a flux in iron and steel production.
- Dolomite supplies calcium and magnesium in some glass batches.
- Calcined or sintered dolomite is used in refractory manufacture.
- Which of these real-world use hold for the sense of dolomite this model covers, and on what evidence? provenance
Typical measurements
Recalled without web access and unsourced; every item is a lead to verify.
- Mohs hardness - 3.5-4 - Mohs scale
- Density of the mineral - Approximately 2.8-2.9 - g/cm³
- Molar mass of ideal CaMg(CO3)2 - Approximately 184.40 - g/mol
- Which of these typical measurements hold for the sense of dolomite 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.
- Crushing and grinding generate dust that can irritate the eyes and respiratory tract.
- Natural dolomitic rock may contain crystalline silica, making dust hazards dependent on mineral composition.
- Acids dissolve dolomite and release carbon dioxide.
- Heating causes decomposition and carbon dioxide release rather than a simple atmospheric-pressure melting transition.
- Calcined dolomite contains reactive oxides whose contact with water can release heat and produce strongly alkaline material.
- Which of these failure modes and hazards hold for the sense of dolomite this model covers, and on what evidence? provenance
Regional variation
Recalled without web access and unsourced; every item is a lead to verify.
- Geological and commercial usage varies between 'dolomite' for both mineral and rock and 'dolostone' specifically for the rock.
- Agricultural product specifications and labeling requirements depend on jurisdiction and measured neutralizing value, fineness, and magnesium content.
- Which of these regional variation hold for the sense of dolomite 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.
- Calcite - Calcite has ideal composition CaCO3; dolomite contains ordered calcium and magnesium and generally reacts much less vigorously with cold dilute hydrochloric acid unless powdered.
- Dolostone - Dolostone is a rock composed predominantly of dolomite mineral and can contain other minerals.
- Limestone - Limestone is a carbonate rock generally dominated by calcite or aragonite; dolomitic limestone also contains dolomite.
- Magnesite - Magnesite has ideal composition MgCO3 and lacks dolomite's ordered calcium-magnesium structure.
- Ankerite - Ankerite is a related iron-rich carbonate; distinguishing it from ferroan dolomite requires compositional analysis and mineral classification criteria.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of dolomite this model covers, and on what evidence? provenance
What the second pass must settle
- Does the registry intend the mineral sense exclusively, or also the rock and commercial-material senses commonly labelled dolomite?
- Which authoritative mineralogical criteria define the boundaries with substituted, poorly ordered or related calcium-magnesium carbonate phases?
- Which substance identifiers are authoritative for this registry entry, and how should supplier identifiers for mixtures be represented?
- Which application standards and test methods should govern grade, neutralisation performance and impurity acceptance?
- Which measured physical and thermal reference values can be adopted with explicit composition, test conditions and uncertainty?