Although the earth has high minerals in silicon and oxygen other class also exist like calcite, pyrite, hametite, magnetite etc. the none silicate minerals are also of great economic importance as they are more concentrate minerals more than the silicon minerals. Silcon exist in six-fold or octahedral structure or coordination. The level polymerization can be determined by the tetrahedral corners formed
There are Native elements which are chemically bonded to other mineral elements. And are either semi-metals, non-metals. Some alloys and solid solutions are also included. Distributed into groups by their structure, ductility and chemical attributes including shinning metallic lustre. The Gold group metals, silver and cupper exist, the platinum group, the iron nickel are characterized by several iron-nickel alloy varieties, examples are taenite and kamacite. Combinations are also available within the Native carbon group and it occurs in allotropes of graphite and diamond, the diamond is much stronger structure than graphite which accounts for diamonds hard structure.
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Sulphide minerals are chemical combinations made of combinations of one or more metallic or semimetalic compounds with sulphur, arsenic or selenium or tellurium. And most time it can form deposites abilities and can form a sulfurous smell when in powdered form such as pyrides. Many sulfide minerals types are economically important as metal ores e.g sphalerite (ZnS), Galena, molybdenum and ore of Mercury and many others.
Mineral Oxides are divided into 3 groups which are simple oxides, hydroxides and multiple oxides. The simple are represented as O2− the major anion and bonding that can be further divided into ratio of oxygen and corresponding cations. H20 is an example which oxides can exist in combination with oxygen we also have peroxides in ratio combination of 2:2. There are existence of other large forms of oxides combination
Sodium chloride (a table salt) is an example of minerals that combine to form clorides other example of combination include halogen like fluorine, chlorine, iodine and bromide which are the major anion combining to form mineral halides.
Carbonates minerals contain the major anionic group which is represented as (CO3]2−. They are known for their cleavage tendencies maintaining a rhombohedra cleavage, and they do react with acidic substances. Hydrochloric acid is used to differentiate carbonates from non- carbonate during geologists exploration. The reaction of carbonates with acide is responsible for the large formation of limestone caves.
Sulphate minerals is found to have the combination of the sulfate anion represented as [SO4]2−. They are fragile, translucent and transparent show tendencies. They precipitate and evaporate when observed forming saline waters. The most common hydrous sulfate are the gypsum category (CaSO4⋅2H2O.
These categories of minerals are characterized by the tetrahedral [PO4]3− anion, however they have generalized structure, the phosphorus is replaced by vanadium, antimony and arsenic. Apatite group are the most common phosphate which also has fluorapatite (Ca5(PO4)3F) within its group and chlorapatite (Ca5(PO4)3Cl) etc. They are major crystalline contents of the teeth and bones. The relatively available monazite group structure of ATO4.