mi-ca
Definition
- Noun (Mineralogy):
- Mica: A group of silicate minerals characterized by a shiny, glassy luster and a perfect basal cleavage, allowing them to be easily split into thin, flexible, and elastic sheets or layers. It is a common component of igneous and metamorphic rocks like granite.
Usage Examples
- Noun:
- Trong phòng thí nghiệm, chúng tôi quan sát các tấm mi-ca mỏng dưới kính hiển vi. (In the laboratory, we observed thin sheets of mica under the microscope.)
- Đá hoa cương thường chứa các hạt mi-ca lấp lánh. (Granite often contains sparkling grains of mica.)
- Mi-ca trong suốt đôi khi được dùng làm cửa sổ cho lò sưởi hoặc lò nung. (Transparent mica is sometimes used for furnace or stove windows.)
Advanced Usage
- "mica schist" (đá phiến mi-ca): A common metamorphic rock rich in mica minerals.
- Vách núi lộ ra một lớp đá phiến mi-ca dày. (The cliff face exposed a thick layer of mica schist.)
Variants and Related Words
Biotite (mi-ca đen): A dark, iron- and magnesium-rich mica.
- Biotit là loại mi-ca phổ biến nhất trong đá granit. (Biotite is the most common type of mica in granite.)
Muscovite (mi-ca trắng): A light-colored, potassium-rich mica, often transparent and used industrially.
- Muscovit, hay mi-ca trắng, có tính cách điện tốt. (Muscovite, or white mica, has good insulating properties.)
Synonyms
- Isinglass: An old term for transparent sheets of mica.
- Glimmer: A descriptive term sometimes used for its shiny appearance.
Related Concepts
- Cleavage (sự cát khai): In mineralogy, the way a mineral breaks along smooth, flat planes. Mica exhibits perfect basal cleavage.
- Silicate mineral (khoáng vật silicat): The large mineral group to which mica belongs, characterized by silicon and oxygen in their structure.