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Are dark colored igneous rocks low in silicate minerals?
They are not low in silicate minerals. They are still primarily composed of them. However, the amount of silica in them is lower than in the lighter-colored rocks. The lightest igneous rocks (felsic) are at least 70% silica while the dark ones (mafic) are between 45% and 52% silica. Silica content below 45% is deemed ultramafic.
The hardness of naturally occuring minerals depends on what?
The hardness of naturally occurring minerals depends on their atomic structure and the strength of the chemical bonds between atoms. Minerals with stronger bonds and more tightly packed atomic structures tend to be harder, while those with weaker bonds and looser structures are softer. The Mohs scale of mineral hardness is commonly used to compare the hardness of different minerals based on their scratch resistance.
The compound formed by the reaction between calcium oxide and silica?
Calcium silicate.
How many oxygen are shared between the tetrahedra of a sheet silicate mineral?
3
What are calc silicate gneiss?
Calc-silicate gneisses simply are marbles with an impure composition, in other words, the ones that contain a high amount of silica, which combine with calcium and magnesium to form piroxenes, anfiboles and olivines as well. It often happens in the metamorphism of plataformal sequences where limestones are present.
What is the difference between silicate and nonsilicate mineral?
Non-silicate minerals don't contain silicon and oxygen in tandem; silicate minerals do.
Relationship between geology and computer?
Computers are made from geological materials, like silicon chips from silicate minerals, wiring from copper minerals, solders from tin and so on.
The building blocks of the silicate minerals is called the what?
Silicate tetrahedra. The tetrahedra are spanned by oxigen atoms, and right in the middle, there is a silicon atom. The chemical formula for one silicate tetrahedron is SiO4 The actual rate between silicon and oxigen can change as the tetrahedra are linked together, as different tetrahedra can share an oxigen atom with eachother.
What is the relationship between a silicate and a tetrahedron?
A silicate is a mineral composed of silicon and oxygen atoms arranged in a tetrahedral structure, where each silicon atom is bound to four oxygen atoms in a tetrahedral shape. This tetrahedral structure is the building block of silicate minerals, which make up the majority of Earth's crust.
Are dark colored igneous rocks low in silicate minerals?
They are not low in silicate minerals. They are still primarily composed of them. However, the amount of silica in them is lower than in the lighter-colored rocks. The lightest igneous rocks (felsic) are at least 70% silica while the dark ones (mafic) are between 45% and 52% silica. Silica content below 45% is deemed ultramafic.
Why do some silicate minerals have cleavage and others do not?
Silicate minerals exhibit cleavage based on their crystal structure and the bonding between silicon-oxygen tetrahedra. Those with a more organized arrangement of tetrahedra, such as micas and feldspars, tend to have well-defined cleavage planes due to weaker bonds along specific directions. In contrast, silicates with a more complex structure or stronger bonds in multiple directions, like quartz, typically do not exhibit cleavage and instead fracture irregularly. Thus, the arrangement of tetrahedra and the nature of the chemical bonds dictate the presence or absence of cleavage in silicate minerals.
Is antimony a silicate or non-silicate?
Antimony is an element, so it is neither silicate nor non-silicate
The distinction between the crust and mantle is primarily on the basis of a difference in?
composition — the crust is primarily composed of lighter, silicate minerals like granite and basalt, while the mantle is composed of denser minerals like peridotite. This compositional difference contributes to variations in density, temperature, and behaviour between the crust and mantle layers of the Earth.
Is salt a silicate?
Sodium chloride is not a silicate but silicates are salts. Don't make a confusion between NaCl and all other salts.
What is an example of mantle?
A person standing between two houses, that could be an example.
What is the Difference between glass and ceramics?
Technically, glass is a kind of ceramic, but when most people talk about ceramics, they mean clay that has been made very hot to cause the particles to bond together, leaving little spaces between them. During this process, the crystal structure of the clay does not change, and the particles do not actually melt. Common silicate glass is made of silicon dioxide and some other minerals, and the process melts these minerals together into a non-crystalline structure. Silicate glass can be transparent, but clay ceramics are not. Ceramics that are not glazed or otherwise treated to make them waterproof can also absorb gas or liquid (like water) into the spaces between crystals.
The hardness of naturally occuring minerals depends on what?
The hardness of naturally occurring minerals depends on their atomic structure and the strength of the chemical bonds between atoms. Minerals with stronger bonds and more tightly packed atomic structures tend to be harder, while those with weaker bonds and looser structures are softer. The Mohs scale of mineral hardness is commonly used to compare the hardness of different minerals based on their scratch resistance.
