Material
Penouta amorphous hydrated niobium oxide precursor
The solid the study precipitates from the niobium strip solution with ammonia and dries at 80 °C, and which it calls a precursor because it is not yet the oxide. Calcining it loses about 19 per cent of its weight, so the material entering the furnace and the material leaving it are not the same material — a distinction the route had lost by naming both of them niobium pentoxide.
Classification
- material class
- INTERMEDIATE
- physical form
- PRECIPITATE
- primary commodity entity id
- entity:niobium-commodity
How this record is known
- 1
- Settled consensus
- Cited as the accepted position of the discipline.
1 of 1 claims on this page cite at least one registered source. Counts describe how each statement is known, not how likely it is to be true.
What Lithoen records
Each claim states how it is known and cites its evidence.
EstablishedNamed by the source as an amorphous hydrated niobium oxide precursor. Weight loss on calcination to the oxide: about 19 per cent. No composition is published for this material.
Measured at this deposit
The study describes precipitation with ammonia at niobium-to-ammonia molar ratios between 0.015 and 0.03, filtration, washing with deionised water and drying at 80 °C for 12 hours, giving an amorphous hydrated niobium oxide, and calls that material a precursor which was then calcined to obtain niobium oxide. It states a weight loss on calcination of about 19 per cent. This corpus records the precursor as its own state because the source names it as one and because a fifth of its mass does not survive the next step; it records no composition for it, because the source publishes none.
- assertion basis: SUBJECT_MEASURED
Evidence support: Supported by the cited evidence · one source
Evidence: Rodríguez 2020 · Peer-reviewed
Record last updated 2026-09-11. Corrections follow the published corrections policy; superseded claims are retained, never silently edited.