8 Allotropes of

are forever! ¾Eachblh blac kbk b llia bll is a carbon ¾It tends to form a cubic lattice ¾It’ ths l t h dth t k e hardest known natural jewelry quality. ¾It has has a higha high dispersion of light of light ¾80% of mined diamonds are for industrial use use as as they they are notare of not of

¾What do they use them for in industry? Carbon doesn’t always form into the shape of a cubic lattice.

• In Fact , there are 8 different .

• In Greek: “to draw/write” • A conductor • The most stable • Is used in • Carbon forms in Hexagonal planes

Lonsdaleite an Arizonan crater • Identified in 1967 in a meteorite found found in in

• Beeeedtobelieved to be originally graphite • due to the heat and pressurecrystal structure upon of impact,graphite it turned to but but kept kept the the

FULLERENES from the US and • Discovered 1985 by a team teamEngland of of scientists scientists

• Shape of a hollow the in this way • Referred to as “buckyballs” • Also known as C60. Why? • Usecancers nano nano-technology to to combine combine

• Hoppgeful for use in tackling and other tough

C540 allotrope • Like all , C540 is a hollow spherical shape created using . • How many atoms of carbon are in it?

C70 • AthAnother Nanotech creation • What do all Fullerenes have in common?

Amorphous Carbon ( & ) • Does not have any visible structure or atomic arrangement of carbon atoms • Is found containing crystallites of graphite anddid diamond d( (so small , it’s often nano size) • Coal has different grades ranging from 55% - 90% pure carbon


Stronger than diamonds Conduct heat well Can be made as either a conductor or CNT’s (()Carbon NanoTubes) are now usedmonitor for the orcondition being of the researchedsoldier for…… • Clothes – waterproof, tear resistant cloth fibers • Military Combat Jackets – the ultra strong CNT fibers will

• Concrete – increases tensile strength and eliminates cracks • • Sports equipment – lighter & stronger equipment as seen previously • SEltSpace Elevator – possibl ! It’y t! th i l It’s in the planning stages • Artificial muscles • Paper • LCD screens • Nano wires • Computer circuits • Air and water filters

Phase Diagram for Carbon Carbon on the Periodic Table REFERENCES • http://webmineral.com/specimens/picshow.p hp?id=2926 ((g)lonsdaleite image) • http://en.wikipedia.org/wiki/Wikipedia:Featur ed_picture_candidates/Six_Allotropes_of_Car bon • http://en.wikipedia.org/wiki/Image:Eight_Allo tropes_of_Carbon.png • http://www.answers.com/topic/fullerene • http://en.wikipedia.org/wiki/Carbon_nanotub e • http://en.wikipedia.org/wiki/Polyaniline Assignment • Divide into 8 groups as listed on the lab tables • You will be then assigned an allotrope of carbon to make with the kinex or marshmallows (ck funding) • You will be given the appropriate number of pieces to make your allotrope • Present your allotrope with some information on a poster board about it which you’ve researched on the internet!