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Atomic Number:67Atomic Symbol : HoAtomic Weight:164.93032Melting Point:2,685 F ( 1,474 C)Boiling Point : 4,892 F ( 2,700 snow )
give-and-take origin : atomic number 67 is derived from the Latin wordHolmia , meaning Stockholm .
A small chunk of ultrapure holmium, 1.5 by 2.5 cm, weighs 17 grams.
Discovery : Swiss chemists Marc Delafontaine and Jacques - Louis Soret documented the limited engrossment bands of holmium in 1878 , declaring it " Element X. " Per Teodor Cleve later severally discovered the element while turn on erbia terra firma , and the constituent is bring up after his aboriginal city . The yellow oxide holmia was prepared by Otto Homberg in 1911 .
Properties of atomic number 67
Like alllanthanidesor rare earth metals , holmium has a metal silver shininess and is fairly soft and malleable . While it is stable in dry air at room temperature it rapidly oxidizes in moist air and at elevated temperatures . Like otherrare earths , holmium seems to have a low acute toxic rating . [ SeePeriodic Table of the Elements ]
Sources of holmium
Ho occurs in gadolinite , monazite , and in other rarified earth mineral . It is commercially abstracted from monazite and occurs in that mineral at a rate of about 0.05 percentage . reducing of its anhydrous chloride or fluoride with Ca metal is the process to isolate the metal .
Uses of atomic number 67
There are no commercial U.S. for Ho , but its magnetized attribute could hold promise for succeeding coating .
( Source : Los Alamos National Laboratory )
