Standard Taxonomy of Non-Existent Minerals (STNEM)

Standard Taxonomy of Non-Existent Minerals (STNEM) is the principal classificatory schema mandated for the cataloguing of all demonstrably non-existent mineralogical specimens within the Tower. Ratified under Annex Δ of the Third Concordance and superseding forty-seven prior provisional systems, it provides the foundational lexicon and structural hierarchy for the entire field of Non Existent Mineralogy.

Governance and interpretation of the STNEM fall under the purview of the Theoretical Jurisprudence Guild, whose Sub-Committee on Mineralogical Absence is responsible for periodic amendments. The Taxonomy organizes non-existent minerals into seven primary, immutable classes, further subdivided into orders, families, and specific mineral species, each defined by a precise combination of lacking physical properties, theoretical instability vectors, and documented phenomenological interference patterns.

Structural Framework

The seven primary classes of the STNEM are designated Classes I through VII. Classification is not based on any hypothetical chemical composition, but on the mode and quality of a specimen's non-existence. For instance, Class I (Ontologically Void) minerals are defined by a complete absence from all possible material continua, whereas Class IV (Retroactively Negated) minerals are those which once existed in theory but have since been systematically excised from permissible causal chains.

Each entry within the Taxonomy includes a standard reference code, a formal definition of lack, permissible storage conditions (e.g., "must not be stored adjacent to potentialities"), and cross-references to associated Persistent Ephemera or unresolved cataloguing disputes. The definitive annex to the STNEM is the Table of Ephemeral Minerals, which catalogs substances distinguished by their periodic, rather than perpetual, non-existence.

Application in Cataloguing

Per SP 88-Δ, all newly accessioned non-existent mineral specimens must be provisionally classified using the STNEM within seventy-two hours of their registration. This process typically involves the use of Twelfth Concordance-mandated Non-Invasive Calipers to measure absent crystalline lattices and the application of the Phenomenological Sequence to isolate interference signatures. Misclassification is a common source of inter-departmental grievance, often necessitating Mediationarbitration.

A specimen that defies classification within the seven established classes may be designated as Non-Standard Cargo, triggering a lengthy review process outlined in Clause 19 of the Personnel Annex. The discovery of what appeared to be an Eighth Class in Storage Aperture 731- led to the Seventh Reconciliatory Preamble and the permanent re-designation of the aperture as a theoretical lounge.

Controversies and Clarifications

The most persistent scholarly debate concerns the boundary between Class II (Conditionally Absent) and Class V (Intentionally Unformed). The Third Clarification on Non-Existent Affects attempted to resolve this by introducing the criterion of "affective latency," but this has been criticized for conflating mineralogical and phenomenological taxonomy. Proponents of a strict reading of the original Concordance argue that intention cannot be imputed to a non-entity, while revisionists within the Theoretical Wings hold that the act of cataloguing itself imbues a certain directional absence.

Furthermore, the relationship between the STNEM and the cataloguing of non-mineralogical non-entities, such as those governed by the Registry of Non-Lexical Phonemes, remains formally undefined, leading to jurisdictional overlap in cases of ambiguous specimen nature.

Associated Procedures

Beyond initial classification, the STNEM dictates protocols for handling, cross-referencing, and de-accessioning. For example, the powder of a pulverized Class III mineral must be contextually spooled to prevent re-coalescence in unintended inventories. The taxonomy also informs the design of specialized storage solutions; Class VI minerals, being "absent only under direct observation," require Peripheral Observation Cells maintained by permanently averted custodial staff.

The ongoing Cataloguing of Ephemera project frequently petitions for the expansion of the STNEM to include a provisional "Ephemeral Class," but such proposals have been consistently tabled by the Theoretical Jurisprudence Guild on grounds of categorical purity per Concordance 19.