FUSE Winter 2017-2018 - Page 9

FUSE Young Reporter iWORLD TIN MYSTERY Most of ancient Europe’s tin came from the British Isles. By the 1700-1800s, highly-successful tin and copper mining in Devon and Cornwall (South West England) had turned the landscape into what is now a World Heritage site. 19th In Northern Europe during the late often century, cathedral organ pipes were winters made of tin alloys. When the coldest No-one came, these pipes began to crumble. pening. knew why this “tin disease” was hap allotrope Nowadays we know our most useful ic solid (form) of tin is a silver-white metall s “white known as the ß-form (‘beta-form’). Thi ling tin” has a melting point of 232 °C, a boi m 3 . g/c point of 2,260 °C and a density of 7.31 bent. It screeches a strange “tin cry” when ) and ß-tin is both malleable (hammerable brittle ductile (fl exible), although it is very above 200 °C. llic α-tin The second allotrope is the non-meta able (‘alpha-tin’). This crumbly, non-malle tin cools “grey tin” forms slowly when white lains and stays below about 13 °C. -This exp those “diseased” organ pipes! Back in 700 BC, the Chinese were mining for tin ore in Yunnan province. China is still a major producer today along with Indonesia, Peru, Brazil and Bolivia. America uses a lot of tin but makes almost none of its own. FUSE reader Theo (on our cover) had great fun working with metal at our Big Family Weekend! FUSE 9