What is the softest mineral? What is the hardest mineral?

Talc is the softest of the minerals known to be mined, and the Mohs scale is commonly used internationally.

As a reference to compare the hardness of the ore, talc, which is the softest ore, is called a reference as a Mohs hardness1.

The softness of the silicate minerals is staggering, and in some places you even use talc as chalk to write on the blackboard, and you are still fluent in using it.

The hardest substance in nature is diamond, most people know, and the softest mineral is a stone called "talc", which is not only soft but also edible, and the mineral reserves in our country are as high as 100 million tons.

Generally, the international use of Mohs hardness to describe the hardness of an object, a total of ten grades, the higher the grade value of the higher the harder, while the Mohs hardness of talc is only 1, and the Mohs hardness of trace diamond is 10. Talc is very delicate to the touch, generally white, with low hardness, so even if you use your fingers to lightly scratch, you can leave traces on the surface, which is a silicate mineral, formed by the deterioration of rocks.

Although talc can be eaten, it is not eaten directly, it must be refined and turned into powder before it can be eaten.

Diamonds, also known as diamonds, are minerals named diamonds. The English word diamond is derived from the ancient Greek word adamant, which means hard and inviolable substance.

The chemical composition of diamonds is carbon, which is the only one in gemstones that is made up of a single element. It belongs to the equiaxed crystal system. The crystal morphology is mostly octahedral, rhomboid, dodecahedron, tetrahedron and their aggregates.

Pure diamonds are colorless and transparent, with different colors due to the mixing of trace elements. Strong adamantine luster. Refractive index, dispersion medium, for.

Homogenizers. The thermal conductivity is centimeters, seconds, degrees. Tested with a thermal conductivity meter, the response is the most sensitive.

The hardness is 10, which is the hardest mineral known at present, and the absolute hardness is 1000 times that of quartz and 150 times that of corundum. One set of cleavage is complete. Density grams of cubic centimeters.

Diamonds are luminous and are exposed to sunlight.

It emits a light cyan phosphorescence at night. X-rays irradiate and fluoresce sky blue. Diamonds are chemically stable and do not dissolve easily in acids and alkalis at room temperature, and acids and bases do not act on them. Adopt it.

Four of the most expensive minerals in the world.

This kind of thing is the softest substance in the world, and it is also the secret to practicing Tai Chi.

There are three systems for characterizing hardness:

Scoring hardness, press-in hardness, rebound hardness.

Minerals mainly use the notched hardness, which is the Mohs scale.

Morse hardness testers are expressed in ten minerals. They are talc, gypsum, calcite, fluorite, apatite, orthoclase, quartz, topaz, corundum, diamond.

The easiest way to judge in the field is with a fingernail and a knife. The hardness of the nails is about 6, and the hardness of the knife is about 6.

The softest mineral on earth is talc, also known as mica. In industry, talc is usually used to grind into a powder and act as a lubricating agent. The weather on Earth is the most "mild" Compared with other planets in the solar system, the weather on Earth can be said to be the most "mild and pleasant".

The hardest mineral in nature is diamond, the hardest metal in the world is chromium, and the hardest stone in nature is diamond.