Coal is not a mineral, because it can not be expressed as a chemical formula, and therefore, does not have a definate crystaline structure. Coal is predominately carbon. The specimen in the photo is Bituminous Coal, with a carbon content of about 90%, and a BTU rating of over 13,000 BTU/pound.
Does coal have a definite chemical composition?
“a naturally-occurring, inorganic solid which possesses a characteristic internal atomic structure and a definite chemical composition.” The American Society for Testing and Materials has defined “coal,” as: … While coal is naturally occurring, it is organic and thus does not meet the ASTM’s definition of “mineral”.
What is the atomic structure of coal?
This structure contains the minimal possible number of atoms at which percentage and weight content of structural elements, characteristic of coal, is maintained, that is 83.2% of carbon, 5.5% of hydrogen, 7.7% of oxygen, 1.1% of nitrogen and 2.2% of sulfur.31 мая 2019 г.
Why is coal not a mineral but graphite is?
Coal is not classified as a mineral because it comes from organic materials. Coal is formed from the remains of dead plants and animals that are…
What mineral is coal made of?
Coal is mostly carbon with variable amounts of other elements; chiefly hydrogen, sulfur, oxygen, and nitrogen. Coal is formed when dead plant matter decays into peat and is converted into coal by the heat and pressure of deep burial over millions of years.
What is the chemical formula of coal?
Coal is divided into four classes: anthracite, bituminous, sub-bituminous, and lignite. Elemental analysis gives empirical formulas such as C137H97O9NS for bituminous coal and C240H90O4NS for high-grade anthracite. Anthracite coal is a dense, hard rock with a jet-black color and a metallic luster.
Is coal man made?
Coal is called a fossil fuel because it was made from plants that were once alive! Since coal comes from plants, and plants get their energy from the sun, the energy in coal also came from the sun. The coal we use today took millions of years to form. … That is why coal is called nonrenewable.
What are the 4 types of coal?
Coal is classified into four main types, or ranks: anthracite, bituminous, subbituminous, and lignite.
What type of rock is coal?
Coal is a combustible sedimentary rock formed from ancient vegetation which has been consolidated between other rock strata and transformed by the combined effects of microbial action, pressure and heat over a considerable time period. This process is commonly called ‘coalification’.
Is black coal a mineral?
A dense, usually black, but sometimes dark brown rock, often with well-defined bands of bright and dull material. The dull bands can contain sedimentary mineral grains. A harder, glossy black coal. It is the highest rank of coal meaning the carbon content is highest.
Is table salt a mineral?
Salt, also known as table salt, or rock salt, is a crystalline mineral that is composed primarily of sodium chloride (NaCl), a chemical compound.
Is rock salt a mineral?
Rock salt is the common name for halite. It is a rock, rather than a mineral, and this is what makes it different to the salt you may find on your dinner table, although they do share many characteristics.
What products are made from coal?
Ammonia gas recovered from coke ovens is used to manufacture ammonia salts, nitric acid and agricultural fertilisers. Thousands of different products have coal or coal by-products as components: soap, aspirins, solvents, dyes, plastics and fibres, such as rayon and nylon.
Does coal occur naturally?
Fossil, Mineral or Rock
The plant remains that make up coal have been “pressure cooked” for millions of years. … While coal is a naturally-occurring solid, it is composed of organic plant material.
Is coal a mineral yes or no?
What’s the deal with coal? It’s classified as an organic sedimentary rock, but rocks are combinations of minerals, and minerals are inorganic. … So yes, coal is classified as an organic sedimentary rock, and yes, rocks are supposed to be made of minerals and minerals can’t be organic.