Search results
Results from the WOW.Com Content Network
Sphalerite is a sulfide mineral with the chemical formula (Zn, Fe)S. [5] It is the most important ore of zinc . Sphalerite is found in a variety of deposit types, but it is primarily in sedimentary exhalative , Mississippi-Valley type , and volcanogenic massive sulfide deposits.
Sphalerite, the more common polymorph of zinc sulfide Wurtzite, the less common polymorph of zinc sulfide. ZnS exists in two main crystalline forms. This dualism is an example of polymorphism. In each form, the coordination geometry at Zn and S is tetrahedral. The more stable cubic form is known also as zinc blende or sphalerite.
Pyrrhotite (pyrrhos in Greek meaning "flame-coloured") is an iron sulfide mineral with the formula Fe (1-x) S (x = 0 to 0.125). It is a nonstoichiometric variant of FeS, the mineral known as troilite.
Wurtzite is a zinc and iron sulfide mineral with the chemical formula (Zn,Fe)S, a less frequently encountered structural polymorph form of sphalerite. The iron content is variable up to eight percent. [5] It is trimorphous with matraite and sphalerite. [2] It occurs in hydrothermal deposits associated with sphalerite, pyrite, chalcopyrite ...
Hemimorphite most frequently occurs as the product of the oxidation of the upper parts of sphalerite bearing ore bodies, accompanied by other secondary minerals which form the so-called iron cap or gossan. Hemimorphite is an important ore of zinc and contains up to 54.2% of the metal, together with silicon, oxygen and hydrogen. The crystals are ...
Many of these are degenerations in the pronunciation of names that originated in other languages. Sometimes a well-known namesake with the same spelling has a markedly different pronunciation. These are known as heterophonic names or heterophones (unlike heterographs , which are written differently but pronounced the same).
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
Sphalerite ZnS (primary) alters to secondary hemimorphite Zn 4 Si 2 O 7 (OH) 2.H 2 O, smithsonite ZnCO 3 and manganese-bearing willemite Zn 2 SiO 4. [2] [5] Pyrite FeS 2 (primary) alters to secondary melanterite FeSO 4.7H 2 O. [5] If the original deposits contain arsenic and phosphorus bearing minerals, secondary arsenates and phosphates will ...