Huntite-Hydromagnesite is a natural mineral mined in Greece and Turkey and sold by R.J. Marshall as H-TEC HTMC9. It is an approximately equal mixture of huntite, Mg3Ca(CO3)4, and hydromagnesite, Mg4(CO3)(OH)2∙3H2O, and is dried, crushed, finely ground, and classified to produce a white powder, the majority of its particles having less than 1 micron size. It …
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