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  • Rocks & Minerals Definitions

    Obsidian Obsidian is volcanic glass. Oligoclase Oligoclase has the formulae (Na,Ca)AlSi3O8 and a relative hardness of 7. It is a plagioclase feldspar.

  • Metalloid Wikipedia

    Judgement-based. A metalloid is an element with properties in between, or that are a mixture of, those of metals and nonmetals, and which is therefore hard to ...

  • Iron ore Wikipedia

    Lower-grade sources of iron ore generally require beneficiation, using techniques like crushing, milling, gravity or heavy media separation, screening, and silica ...

  • Chapter 63 Metal: Chemical Properties and Toxicity

    ALUMINIUM Occurrence and uses. Aluminium is the most abundant metal in the earths crust, where it is found in combination with oxygen, fluorine, silica, etc., but ...

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  • Sulphur in Steels ispatguru.com

    Sulphur in Steels Sulphur (S) (atomic number 16 and atomic weight 32.066) has density of 2.05 gm/cc. Monoclinic S melts at 119.25 deg C and boils at 444.6 deg C.