gedrite

Versioned gedrite assignment

Preserve the original label alongside the assessed identity and its naming authority.

1. Which mineral nomenclature publication and version define gedrite for this determination? definition
2. Who assigned the specimen's original name, and what analytical evidence accompanied it? provenance

Chemical and symmetry boundaries

Treat anthophyllite, ferro-gedrite, and monoclinic amphiboles as explicit identification alternatives.

1. Which measured compositional criteria separate this grain from anthophyllite and ferro-gedrite under the selected scheme? boundary
2. What structural evidence excludes a monoclinic amphibole interpretation? measurement

Representative grain analysis

Separate genuine compositional variation from beam overlap, inclusions, and analytical limitations.

1. What are the measured Si, Al, Mg, Fe, Na, Ca, and other detected constituent concentrations, with totals and uncertainties? measurement
2. Do analytical spots sample homogeneous gedrite, zoned regions, inclusions, or adjacent phases? boundary

Auditable formula calculation

Record normalization, iron valence, aluminium allocation, and anion assumptions without presenting estimates as direct observations.

1. Which normalization and site-allocation procedure converts the analysis to an amphibole formula? definition
2. Which Fe-valence and OH, F, or Cl quantities were measured, estimated, or left unconstrained? measurement
3. Would plausible alternative assumptions change the gedrite assignment? boundary

Orthorhombic phase evidence

Gedrite is reported as orthorhombic, with space group Pnma; use this as a reference to test specimen data. Reference: [Handbook of Mineralogy: Gedrite](https://www.handbookofmineralogy.org/pdfs/gedrite.pdf).

1. Which indexed diffraction observations support an orthorhombic gedrite phase? measurement
2. Are structural measurements linked to the chemically analysed grain or to a potentially mixed powder? provenance

Gedrite domain integrity

Distinguish intact gedrite domains from intergrown amphiboles and replacement products.

1. What images or maps establish the size and continuity of compositionally distinct domains? measurement
2. Which features support intergrowth, zoning, or replacement, and which interpretations remain unresolved? boundary
3. Which grain region is suitable for a follow-up analysis that avoids mixed-phase results? action

Sample context and phase fraction

Record collection context, associated phases, and gedrite abundance separately from grain chemistry.

1. What locality, host-rock observations, and collection history are documented for this specimen? provenance
2. What fraction of the assessed material is gedrite, and how was that fraction determined? measurement
3. Does the analysed grain represent the specimen or only a selected compositional domain? boundary

Material-specific handling evidence

Keep observed habit, measured particle geometry, and any applicable hazard determination distinct.

1. What microscopy establishes the habit and dimensions of particles present in this material? measurement
2. What sample-specific evidence and applicable requirements govern cutting, crushing, or powder preparation? action
3. Does any supplied hazard classification apply to the analysed material and its physical form? boundary

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 gedrite 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 gedrite this model covers, and on what evidence? provenance

Standards and regulation

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

1. Which of these standards and regulation hold for the sense of gedrite 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 gedrite 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 gedrite 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 gedrite 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 gedrite this model covers, and on what evidence? provenance