Black iron or steel grey streak the steel gray or black. Hematite inclusions Brown or red-brown. Metal half metallic luster. Opaque. No cleavage. Occasional or cracked. Hardness 5~ 5.5. Brittle. Relative density 4.0~5.0. Weakly magnetic. Under polarizing microscope: dark red, slightly transparent or opaque. A uniaxial Crystal (-). Has a very high refractive index (N=2.7) and birefringence.

 

Iron steel gray or black;Gray or black streaks steel.Brown, or maroon contain hematite inclusions.Metal to a half metallic luster.Opaque.No cleavage.Sometimes appear or cracked.The hardness of 5 ~ 5.5.Crispy.Relative density 4.0 ~ 5.0.Weak magnetism.Under polarizer: deep red, opaque or transparent.One axis crystal (-).Has the very high refractive index (N = 2.7) and discount rate.

 

Tio3 and crystal are the oxides of the trigonal crystal.English name is derived from the initial discovery of this mineral origin of Russian urals il door mountain (И л ь м е н с seem и е f о р ы).containing

 

ilmenite

 

 

 

ilmenite

 

TiO252.66 % is the main source of mineral extraction for titanium and titanium dioxide.The crystals are often tabular, and the aggregate is lumpy or granular.Steel grey to iron black, black to brown, semi-metallic luster.Morse's hardness is 5 to 6, which is 4.70 to 4.78.Weak magnetism.It is commonly used as a secondary mineral in igneous rock and metamorphic rock, and can also form sand mines.The famous mines include the ilmeno mountains in Russia, the clangler in Norway, the iron mountain in the us of Wyoming, the elard lake in Quebec, Canada.China's sichuan panzhihua iron ore deposit is also a large titanium ore producing area, with its titanium iron ore microscoped or flaky in the form of the magnetite particles.

 

Titanium density of 4.506 4.516 g/cubic centimeters (20 ℃), higher than aluminum and lower than that of iron, copper, nickel. But than intensity is located in the top of the metal. 1668 + 4 ℃, melting point 3.7 5.0 kcal/gram atom latent heat of fusion, the boiling point of 3260-20 ℃, the latent heat of vaporization 102.5 112.5 kcal/gram atom, critical temperature 4350 ℃, the critical pressure of 1130 atmospheres. Poor thermal conductivity and electrical conductivity of titanium, similar to or slightly lower than stainless steel, titanium with superconductivity, the superconducting critical temperature of pure titanium 0.38 0.4 k. at 25 ℃, titanium heat capacity of 0.126 CARDS/gram atom, enthalpy 1149 CARDS/gram atom, entropy card/gram atom 7.33 degrees, titanium is paramagnetic substance, permeability is 1.00004.

 

Titanium has plasticity, elongation can be up to 50-60% of high purity titanium, reduction of area of up to 70-80%, but strength is low, not as a structural material. The presence of impurities in titanium, had great effects on the mechanical properties, especially the interstitial impurity (oxygen, nitrogen, carbon) can greatly improve the strength of the titanium, significantly reduce its plastic. Titanium as a structural material has good mechanical properties, is through the strict control of the appropriate content of impurities and adding alloying elements.