pascoite

Species boundary

Keep pascoite distinct from a family name, a generic calcium vanadate and an unverified specimen label.

1. Which mineralogical reference anchors the pascoite name and formula used for this identification? definition
2. Does the attribution identify pascoite itself, a related mineral, or merely calcium-vanadate material? boundary

Composition and admixture

Separate intrinsic chemical departures from contributions made by matrix and adjacent grains.

1. What Ca:V ratio was measured, with what uncertainty and analytical spot size? measurement
2. Can additional elements be assigned to the pascoite phase rather than inclusions or matrix? boundary
3. Was water content measured independently or assumed from the species formula? measurement

Diffraction match

Record the quality and limitations of a phase-level structural assignment.

1. Which measured reflections support pascoite, and which reference pattern or structure was used? measurement
2. Are unexplained reflections attributable to other phases, alteration or an incorrect identification? boundary
3. Could sample preparation or measurement conditions have changed the hydrate before diffraction was collected? provenance

Supporting observations

Distinguish observations on the candidate mineral from properties of its host specimen.

1. What colour, habit, translucency and surface texture are observed on the candidate pascoite grains? measurement
2. Were any hardness or optical observations made on isolated grains or on the surrounding matrix? boundary
3. Which unresolved alternative identification requires structural or chemical testing? action

Water-loss assessment

Treat suspected dehydration as an evidence-dependent state assessment.

1. What temperature, humidity, vacuum or heating exposures preceded the current observation? provenance
2. Do changes in colour, mass or diffraction support water loss rather than contamination or another alteration? measurement
3. Does the altered material still justify a pascoite identification, or should its present phase remain unresolved? boundary

Preservation decision

Choose handling and storage measures while retaining a record of their evidential basis.

1. Has washing, condensation or another liquid exposure removed or redistributed the candidate mineral? provenance
2. Which storage conditions have preserved this specimen's observed state, and for how long? measurement
3. What evidence supports the proposed cleaning, mounting or storage intervention? action

Crust origin

Distinguish field occurrence from subsequent growth or redistribution during storage.

1. Was the candidate crust documented at collection, or first observed after storage or treatment? provenance
2. What matrix and neighbouring phases are independently identified? measurement
3. What evidence distinguishes natural deposition from post-collection crystallisation? boundary

Locality and fragment link

Keep locality assertions and analytical fragments traceable to the parent specimen.

1. Which collection record supports the stated mine, locality and collection date? provenance
2. Can every analysed fragment be traced to its position on the parent specimen? provenance
3. Does the analysed fragment justify identifying the whole crust as pascoite, or only the sampled region? boundary

Sampling value

Assess whether the expected information warrants consuming or changing pascoite-bearing material.

1. Which unresolved question requires material removal rather than examination in place? action
2. What fragment size and location provide representative evidence while retaining identifiable material? action
3. How will preparation-related changes be distinguished from the specimen's original state? measurement

Handling basis

Avoid assigning unsupported hazard classes or transferring properties from associated minerals to pascoite.

1. What authoritative handling information applies specifically to this material and its proposed use? provenance
2. Do identified matrix constituents require controls beyond those justified for the pascoite phase? boundary
3. Will the operation generate dust or solutions, and what documented controls govern those outputs? action

Check these first

Recalled without web access and unsourced; every item is a lead to verify.

1. Which of these check these first hold for the sense of pascoite this model covers, and on what evidence? provenance

Identifiers and schemes

Recalled without web access and unsourced; every item is a lead to verify.

1. Which of these identifiers and schemes hold for the sense of pascoite this model covers, and on what evidence? provenance

Real-world use

Recalled without web access and unsourced; every item is a lead to verify.

1. Which of these real-world use hold for the sense of pascoite this model covers, and on what evidence? provenance

Typical measurements

Recalled without web access and unsourced; every item is a lead to verify.

1. Which of these typical measurements hold for the sense of pascoite 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.

1. Which of these failure modes and hazards hold for the sense of pascoite 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.

1. Which of these neighbouring kinds and how to tell them apart hold for the sense of pascoite this model covers, and on what evidence? provenance