wulfenite

Thân thiện

A geologist holds a specimen of wulfenite up to the light.

Definition

Noun: 1. A mineral: A naturally occurring, inorganic solid with a specific chemical composition and crystalline structure. Wulfenite is a specific mineral composed of lead molybdate (PbMoO₄). 2. A source of molybdenum: Wulfenite is an important ore mineral, meaning it is mined as a primary source for the metallic element molybdenum. 3. Characteristic appearance: It is typically recognized by its distinctive color, which ranges from yellow to orange or brown, and its common crystal habit, which is often thin, tabular, or square-shaped.

Usage Examples

• As a mineral specimen: "The museum's new acquisition is a stunning crystal of wulfenite on matrix."
• As an ore: "Although not the most common source, wulfenite is still mined as a minor ore of molybdenum."
• Describing its properties: "The vibrant orange color of this wulfenite is due to trace impurities."

Advanced Usage

• In mineralogy and geology: The term is used precisely within scientific contexts to classify and describe a specific mineral species. Its crystal system (tetragonal) and specific gravity are defining characteristics.
  • Example: "Under cross-polarized light, wulfenite exhibits high birefringence."

Variants and Related Words

• Molybdate: A salt or ester of molybdic acid. Wulfenite is a lead molybdate.
• Lead molybdate: The chemical name (PbMoO₄) for wulfenite.

Synonyms

• Lead molybdate (Chemical synonym)

Related Phrases/Idioms

(This is a highly specific scientific term and is not used in idioms or common phrasal verbs.)

Học thuật

Noun

1. a yellow to orange or brown mineral used as a molybdenum ore