Definition of silica in English:

silica

noun ˈsɪlɪkəˈsɪlɪkə

mass noun

A hard, unreactive, colourless compound which occurs as the mineral quartz and as a principal constituent of sandstone and other rocks.
硅石
Alternative name: silicon dioxide; chemical formula: SiO₂
Example sentencesExamples
- Cristobalite is a crystalline form of silica that has a diamondlike structure.
- Glass is made from silica the most common mineral on the planet and aluminium is the most abundant metal on earth.
- Precipitation of gold is favoured by similar conditions to those that favour precipitation of silica.
- Quartz and sand are composed of silicon and oxygen alone: silicon dioxide, or silica.
- Soluble silicates can be obtained by heating alkali metal carbonates and silica.
- Components such as transistors on microchips are made of inorganic materials, primarily silicon and silicon dioxide.
- Chert is a finely crystalline silica that commonly forms in association with hot springs.
- In the fossilisation process, the original organic parts of the shark's tooth are replaced by minerals such as iron pyrites and silica.
- Silica aerogel is made by mixing silicon dioxide with liquid alcohol, then drying out all the alcohol until you have the least-dense matter on earth: A piece of silica aerogel is 99.6 per cent empty space.
- For some animals, developing hard shells of silica, or incorporating calcium in bones and teeth, has clear benefits.
- Sandy soil attached to the furs was the source of silica in the fur dust.
- The most common minerals are those that contain silicon dioxide in one form or another.
- The silica and other minerals in the clay vitrify under heat and will not become soft clay again.
- Several powders or dry colours use a base of asbestos, chalk powder or silica.
- The host limestone surrounding the pockets has been largely replaced by silica and iron oxides.
- Soils are generally clay silica of varied depths and exposures.
- The silicate minerals are those that contain silica, a combination of silicon and oxygen.
- When serpentine dissolves in sulfuric acid, the silicon in the mineral becomes silicon dioxide, or sand, and falls to the bottom, while the magnesium becomes magnesium sulfate.
- Early in the 1800s, mineralogists recognized that tiger's-eye was a fibrous variety of quartz, or silicon dioxide.
- The engines of tomorrow's PCs may be based not on silicon dioxide but on exotic new compounds such as perovskite oxide or even the stuff of life itself, DNA.

Derivatives

siliceous

adjective sɪˈlɪʃəssəˈlɪʃəs

Containing or consisting of silica.
siliceous limestone
Example sentencesExamples
- siliceous sediments
- Tectonic ironstone encompasses siliceous and ferruginous rock types that are characterized by the presence of chert or cherty quartzite, iron sulphides and their alteration products.
- Quartz is the dominant mineral in veins in siliceous rocks, calcite in limestones, and gypsum in gypsiferous sediments.
- After initial fieldwork in 2000 we realized that the ‘upper siliceous zone’ can be further subdivided into two distinct siliceous horizons.

Origin

Early 19th century: from Latin silex, silic- 'flint', on the pattern of words such as alumina.

Rhymes

basilica

Definition of silica in US English:

silica

nounˈsɪlɪkəˈsilikə

A hard, unreactive, colorless compound which occurs as the mineral quartz and as a principal constituent of sandstone and other rocks.
硅石
Alternative name: silicon dioxide; chemical formula: SiO₂
Example sentencesExamples
- Glass is made from silica the most common mineral on the planet and aluminium is the most abundant metal on earth.
- Components such as transistors on microchips are made of inorganic materials, primarily silicon and silicon dioxide.
- Cristobalite is a crystalline form of silica that has a diamondlike structure.
- Soluble silicates can be obtained by heating alkali metal carbonates and silica.
- The silica and other minerals in the clay vitrify under heat and will not become soft clay again.
- In the fossilisation process, the original organic parts of the shark's tooth are replaced by minerals such as iron pyrites and silica.
- The silicate minerals are those that contain silica, a combination of silicon and oxygen.
- For some animals, developing hard shells of silica, or incorporating calcium in bones and teeth, has clear benefits.
- Soils are generally clay silica of varied depths and exposures.
- Several powders or dry colours use a base of asbestos, chalk powder or silica.
- The most common minerals are those that contain silicon dioxide in one form or another.
- The engines of tomorrow's PCs may be based not on silicon dioxide but on exotic new compounds such as perovskite oxide or even the stuff of life itself, DNA.
- Chert is a finely crystalline silica that commonly forms in association with hot springs.
- Sandy soil attached to the furs was the source of silica in the fur dust.
- Early in the 1800s, mineralogists recognized that tiger's-eye was a fibrous variety of quartz, or silicon dioxide.
- Precipitation of gold is favoured by similar conditions to those that favour precipitation of silica.
- Quartz and sand are composed of silicon and oxygen alone: silicon dioxide, or silica.
- When serpentine dissolves in sulfuric acid, the silicon in the mineral becomes silicon dioxide, or sand, and falls to the bottom, while the magnesium becomes magnesium sulfate.
- The host limestone surrounding the pockets has been largely replaced by silica and iron oxides.
- Silica aerogel is made by mixing silicon dioxide with liquid alcohol, then drying out all the alcohol until you have the least-dense matter on earth: A piece of silica aerogel is 99.6 per cent empty space.

Origin

Early 19th century: from Latin silex, silic- ‘flint’, on the pattern of words such as alumina.

单词	silica
释义	Definition of silica in English: silica noun ˈsɪlɪkəˈsɪlɪkə mass noun A hard, unreactive, colourless compound which occurs as the mineral quartz and as a principal constituent of sandstone and other rocks. 硅石 Alternative name: silicon dioxide; chemical formula: SiO₂ Example sentencesExamples Cristobalite is a crystalline form of silica that has a diamondlike structure. Glass is made from silica the most common mineral on the planet and aluminium is the most abundant metal on earth. Precipitation of gold is favoured by similar conditions to those that favour precipitation of silica. Quartz and sand are composed of silicon and oxygen alone: silicon dioxide, or silica. Soluble silicates can be obtained by heating alkali metal carbonates and silica. Components such as transistors on microchips are made of inorganic materials, primarily silicon and silicon dioxide. Chert is a finely crystalline silica that commonly forms in association with hot springs. In the fossilisation process, the original organic parts of the shark's tooth are replaced by minerals such as iron pyrites and silica. Silica aerogel is made by mixing silicon dioxide with liquid alcohol, then drying out all the alcohol until you have the least-dense matter on earth: A piece of silica aerogel is 99.6 per cent empty space. For some animals, developing hard shells of silica, or incorporating calcium in bones and teeth, has clear benefits. Sandy soil attached to the furs was the source of silica in the fur dust. The most common minerals are those that contain silicon dioxide in one form or another. The silica and other minerals in the clay vitrify under heat and will not become soft clay again. Several powders or dry colours use a base of asbestos, chalk powder or silica. The host limestone surrounding the pockets has been largely replaced by silica and iron oxides. Soils are generally clay silica of varied depths and exposures. The silicate minerals are those that contain silica, a combination of silicon and oxygen. When serpentine dissolves in sulfuric acid, the silicon in the mineral becomes silicon dioxide, or sand, and falls to the bottom, while the magnesium becomes magnesium sulfate. Early in the 1800s, mineralogists recognized that tiger's-eye was a fibrous variety of quartz, or silicon dioxide. The engines of tomorrow's PCs may be based not on silicon dioxide but on exotic new compounds such as perovskite oxide or even the stuff of life itself, DNA. Derivatives siliceous adjective sɪˈlɪʃəssəˈlɪʃəs Containing or consisting of silica. siliceous limestone Example sentencesExamples siliceous sediments Tectonic ironstone encompasses siliceous and ferruginous rock types that are characterized by the presence of chert or cherty quartzite, iron sulphides and their alteration products. Quartz is the dominant mineral in veins in siliceous rocks, calcite in limestones, and gypsum in gypsiferous sediments. After initial fieldwork in 2000 we realized that the ‘upper siliceous zone’ can be further subdivided into two distinct siliceous horizons. Origin Early 19th century: from Latin silex, silic- 'flint', on the pattern of words such as alumina. Rhymes basilica Definition of silica in US English: silica nounˈsɪlɪkəˈsilikə A hard, unreactive, colorless compound which occurs as the mineral quartz and as a principal constituent of sandstone and other rocks. 硅石 Alternative name: silicon dioxide; chemical formula: SiO₂ Example sentencesExamples Glass is made from silica the most common mineral on the planet and aluminium is the most abundant metal on earth. Components such as transistors on microchips are made of inorganic materials, primarily silicon and silicon dioxide. Cristobalite is a crystalline form of silica that has a diamondlike structure. Soluble silicates can be obtained by heating alkali metal carbonates and silica. The silica and other minerals in the clay vitrify under heat and will not become soft clay again. In the fossilisation process, the original organic parts of the shark's tooth are replaced by minerals such as iron pyrites and silica. The silicate minerals are those that contain silica, a combination of silicon and oxygen. For some animals, developing hard shells of silica, or incorporating calcium in bones and teeth, has clear benefits. Soils are generally clay silica of varied depths and exposures. Several powders or dry colours use a base of asbestos, chalk powder or silica. The most common minerals are those that contain silicon dioxide in one form or another. The engines of tomorrow's PCs may be based not on silicon dioxide but on exotic new compounds such as perovskite oxide or even the stuff of life itself, DNA. Chert is a finely crystalline silica that commonly forms in association with hot springs. Sandy soil attached to the furs was the source of silica in the fur dust. Early in the 1800s, mineralogists recognized that tiger's-eye was a fibrous variety of quartz, or silicon dioxide. Precipitation of gold is favoured by similar conditions to those that favour precipitation of silica. Quartz and sand are composed of silicon and oxygen alone: silicon dioxide, or silica. When serpentine dissolves in sulfuric acid, the silicon in the mineral becomes silicon dioxide, or sand, and falls to the bottom, while the magnesium becomes magnesium sulfate. The host limestone surrounding the pockets has been largely replaced by silica and iron oxides. Silica aerogel is made by mixing silicon dioxide with liquid alcohol, then drying out all the alcohol until you have the least-dense matter on earth: A piece of silica aerogel is 99.6 per cent empty space. Origin Early 19th century: from Latin silex, silic- ‘flint’, on the pattern of words such as alumina.
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