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cassiterite extraction mine

coltan - wikipedia

the congolese mine coltan with few tools no safety procedures and often no mining experience. no government aid or intervention is available in many unethical and abusive circumstances. miners consider coltan mining a way to provide for themselves in the face of widespread war and conflict and a government that has no concern for their welfare.

on sustainability - page 4 zdnet

<p>james has more than 15 years of experience working on corporate sustainability issues from both the corporate and ngo campaigning perspective. he has worked directly within the banking (farm

cassiterite - mineral properties - used as an ore of tin

what is cassiterite cassiterite is a tin oxide mineral with a chemical composition of sno 2. it is the most important source of tin and most of the world’s supply of tin is obtained by mining cassiterite. small amounts of primary cassiterite are found in igneous and metamorphic rocks throughout the world. it is also a residual mineral found

cassiterite - wikipedia

cassiterite is a tin oxide mineral sno is generally opaque but it is translucent in thin crystals.its luster and multiple crystal faces produce a desirable gem. cassiterite has been the chief tin ore throughout ancient history and remains the most important source of tin today.

cassiterite: mineral information data and localities.

the mineral name is derived from the term “cassiterides” which was applied 'islands off the western coast of europe' in pre-roman times (the exact location of these 'islands' has been hotly debated over the years current thought is that the source was probably mainland spain and that even 2000 years ago traders had a habit of providing misleading locality information to protect their

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