Bilingual edition: English is preserved and Chinese follows each unit. Terminology uses the confirmed v20260916 glossary; automated semantic review remains traceable.
中英双语版：英文原文完整保留，中文紧随对应单元；术语采用 v20260916 确认表，自动语义审校结果可追溯。

Uraninite

铀矿石

UO2

UO₂

This sample of uraninite is displayed in the Smithsonian Museum of Natural History. Uraninite is an oxide of uranium with the composition UO2. The sample at left is about 2x2.5 cm and is from Fission mine, Bancroft, Ontario, Canada.

这种铀矿石样品陈列在史密森尼自然历史博物馆中。铀矿石是一种铀的氧化物，其化学式为UO₂。左上方的样品尺寸约为2x2.5厘米，采自加拿大安大略省班克罗夫特市的裂变矿。

Mindat: Uraninite

Mindat: 赤铁矿
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