Identify the mineral that is not an ore of uranium among the following commonly cited names.

Introduction / Context:Ore identification is essential in the nuclear fuel cycle. While several minerals carry uranium in significant quantities (e.g., pitchblende/uraninite, carnotite, uranophane), many common minerals are unrelated to uranium. This question checks the ability to differentiate uranium ores from unrelated minerals.

Given Data / Assumptions:

• Typical uranium-bearing minerals vs. non-uranium minerals.
• Common textbook examples used in competitive exams.
• Names may be similar sounding but indicate different chemistries.

Concept / Approach:Pitchblende (uraninite) and carnotite are well-known uranium ores; uranophane is a hydrated uranium silicate also found in secondary deposits. Kyanite, by contrast, is an aluminum silicate (Al2SiO5) used as a refractory material and contains no uranium. The task is to exclude the non-uranium mineral from the list.

Step-by-Step Solution:Match minerals to uranium content: pitchblende ✓, carnotite ✓, uranophane ✓.Identify kyanite: Al2SiO5, refractory, not a uranium ore.Select the outlier: kyanite.

Verification / Alternative check:Mineralogy references catalog kyanite among aluminosilicate polymorphs (with andalusite, sillimanite), not uranium-bearing species. Uranium ores are dominantly oxides, vanadates, phosphates, or silicates of uranium.

Why Other Options Are Wrong:Pitchblende: primary uranium oxide ore.Carnotite: potassium uranium vanadate; an important uranium–vanadium ore.Rescolite: sometimes cited as a synonym/misspelling in legacy lists; not as common as others but historically associated with uranium occurrences in some texts.Uranophane: hydrated uranium silicate found in oxidized zones.

Common Pitfalls:Confusing refractory aluminosilicates with uranium minerals due to unfamiliar names.Assuming every rare-sounding mineral is uranium-bearing.

Final Answer:Kyanite