Table of Ephemeral Minerals

The Table of Ephemeral Minerals is the standardized registry of mineralogical substances whose primary attribute is a demonstrable period of material non-existence. Formally adopted by the Committee for Ephemeral Cohesion in Year 12,477 of the Tower Record, it serves as the definitive annex to the Standard Taxonomy of Non-Existent Minerals for all substances exhibiting temporal instability.

Purpose and Scope

The Table exists to classify, index, and regulate minerals that phase in and out of physical coherence. Unlike entries in the main Non Existent Mineralogy corpus, which catalogue substances that are perpetually and categorically non-existent, ephemeral minerals possess a cyclical or conditional reality. A substance is eligible for inclusion on the Table if it can be documented to have a measurable "absent phase" and a "present phase," with the transition between states being predictable or following an identifiable trigger. The Table records each mineral's accepted name, its STNEM class, its ephemeral cycle parameters, and its known catalytic or inhibitory agents.

Administration and Amendments

Custodianship of the Table is held jointly by the Department of Non-Existent Mineralogy and the Office of Ephemeral Cartography. Proposals for new entries or amendments to existing ones must be submitted in triplicate to the Registrar of Ephemera on Spiral 40. Approval requires a dual-certification process: one from a mineralogical assay conducted during the substance's present phase, and one from a gradient-stability reading confirming its absence during its absent phase, as per the Ephemeral Gradients system. The official, master copy of the Table is engraved on a series of interlocking slate tablets housed in a vibration-dampened vault adjacent to the Receding Reference Desk on Floor 301.

Notable Entries

The Table currently lists forty-seven certified ephemeral minerals. Among the most studied are:

• Fugax Spar (STNEM Class III-B): A prismatic crystal that exists only during the silent intervals between the striking of the great horological bells on the upper floors. Its absent phase coincides precisely with any percussive sound above 30 decibels.
• Somnic Chlorite (STNEM Class V-D): A layered silicate that manifests within a twelve-meter radius of any sleeping Librarian. It reverts to a non-existent state upon the individual's awakening, leaving behind only a faint, ozone-like scent.
• Iterum Coal (STNEM Class VII-F): A combustible carbonaceous material that appears only on the previously charred sites of its own combustion. Its cycle is therefore self-perpetuating and contingent upon its prior use as fuel.

Regulatory Implications

The legal status of an ephemeral mineral is contingent upon its phase. Clause 7.1.4 of the Register of Ephemeral Statutes explicitly states that "jurisdiction, taxation, and liability pertaining to a registered ephemeral substance apply solely during its documented present phase." This has led to complex jurisdictional disputes, particularly concerning mining rights and the ownership of extracted materials that subsequently vanish. The Table's cycle parameters are frequently cited as evidence in Tribunal hearings. Furthermore, the handling and storage of ephemeral minerals during their present phase must comply with the containment protocols outlined in Annex Γ of the Second Concordance.

Scholarly Disputes

The primary ontological debate surrounding the Table concerns whether an ephemeral mineral is a single entity with alternating states, or two distinct entities—one existent and one non-existent—that alternate occupancy of a conceptual designation. The "Unitary Theory," favored by the Department of Mineralogy, holds the former view. The "Displacement Hypothesis," advanced by several prominent Ephemeral Cartographers, argues the latter, suggesting the Table actually catalogues pairs of minerals linked by a causal vacuum. This dispute is more than academic, as it influences the classification of newly discovered substances with irregular or multi-stage cycles, such as the contested Marlboric Yearning.

Related Documentation

The Table of Ephemeral Minerals is formally authorized under Ordinance 12.45.7 (codified in the Register of Ephemeral Statutes) and is cross-referenced with the Master Orthographic Table for the approved spelling of each entry. Its taxonomic framework is derived from, and subordinate to, the Third Concordance, which ratified the STNEM. For categorical errors in classification, see the Annex A: Table of Recognized Categorical Errors.