ga-len

Người thợ mỏ khai thác quặng ga-len trong hầm mỏ.

Definition

1. Noun:
   • Galena: A natural mineral, the primary ore of lead, composed of lead sulfide (PbS). It is characterized by its metallic luster, cubic crystal structure, and distinctive lead-gray to blue-gray color. It is a semiconductor and was historically used in early crystal radio receivers to detect radio waves.

Usage Examples

• Noun:
  • Ga-len là quặng chì quan trọng nhất. (Galena is the most important lead ore.)
  • Tinh thể ga-len thường có hình khối. (Galena crystals often have a cubic shape.)
  • Các máy thu thanh sơ khai đôi khi sử dụng một mẩu ga-len. (Early radios sometimes used a piece of galena.)

Advanced Usage

• In geology and mineralogy, "galena" is often associated with other sulfide minerals in hydrothermal veins.
  • Mỏ này khai thác ga-len và sphalerit. (This mine extracts galena and sphalerite.)

Variants and Related Words

• Quặng galena: Galena ore.
• Tinh thể galena: Galena crystal.

Synonyms

• Lead glance: An older, less common name for galena.
• Lead sulfide: The chemical compound name.

Related Terms

• Crystal detector: A simple radio wave detector made using a crystal like galena and a fine wire known as a "cat's whisker."
• Semiconductor: A material, like galena, with electrical conductivity between that of a conductor and an insulator.