ation ▁of ▁plat in um ▁and ▁U ral ), ▁r uth enium ▁( after ▁Ruth enia , ▁the ▁Latin ▁name ▁for ▁Rus ) ▁and ▁pol in ium ▁( from ▁the ▁Greek ▁word ▁pol ia , ▁meaning ▁grey - ha ired , ▁for ▁its ▁resid ue ▁color ; ▁not ▁to ▁be ▁confused ▁with ▁pol on ium , ▁discovered ▁later ). ▁However , ▁the ▁quantity ▁of ▁the ▁met als ▁was ▁too ▁small ▁to ▁isol ate , ▁and ▁Os ann ▁eventually ▁with d rew ▁his ▁discovery ▁claims . ▁It ▁was ▁up ▁to ▁the ▁Russian ▁chem ist ▁Karl ▁Klaus ▁to ▁verify ▁their ▁existence , ▁which ▁he ▁did ▁in ▁ 1 8 4 4 ▁by ▁isol ating ▁meas urable ▁quantities ▁of ▁r uth enium . ▁For ▁this ▁reason , ▁Klaus ▁is ▁usually ▁named ▁as ▁the ▁discover er ▁of ▁r uth enium ▁rather ▁than ▁Os ann . ▁ ▁He ▁was ▁the ▁brother ▁of ▁bal ne ologist ▁Emil ▁Os ann ▁( 1 7 8 7 - 1 8 4 2 ) ▁and ▁phil ologist ▁Friedrich ▁Got th il f ▁Os ann ▁( 1 7 9 4 - 1 8 5 8 ). ▁ ▁Notes ▁ ▁External ▁links ▁▁ ▁Gott fried ▁Wilhelm ▁Os ann ▁at ▁Bayer ische ▁Staats bibliothek ▁ ▁Category : 1 7 9 6 ▁birth s ▁Category : 1 8 6 6 ▁death s ▁Category : G erman ▁chem ists ▁Category : G erman ▁phys ic ists <0x0A> </s> ▁Ac acia ▁mac rane ura , ▁commonly ▁known ▁as ▁big ▁mac ▁w attle , ▁is ▁a ▁shr ub ▁belonging ▁to