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The density of osmium is slightly greater than that of iridium; the two are so similar (22.587 versus 22.562 g/cm 3 at 20 °C) that each was at one time considered to be the densest element. Only in the 1990s were measurements made accurately enough (by means of X-ray crystallography ) to be certain that osmium is the denser of the two.
— "Values ranging from 21.3 to 21.5 gm/cm 3 at 20 °C have been reported for the density of annealed platinum; the best value being about 21.45 gm/cm 3 at 20 °C." 21.46 g/cm 3 — Rose, T. Kirke. The Precious Metals, Comprising Gold, Silver and Platinum .
Osmium is the densest known element at standard conditions for ... pound per cubic foot (1 g/cm 3 ≈ 62.427961 ... Density of liquid water at 1 atm pressure Temp. ...
Mercury is the heaviest liquid at room temperature. But the heaviest liquid irrespective of temperature is liquid osmium (a rare metal) at its melting point (3033°C/5491.4°F), with a density of 22.59 g·cm −3, 1.65 times as heavy as mercury. [4]
The speed of sound in any chemical element in the fluid phase has one temperature-dependent value. In the solid phase, different types of sound wave may be propagated, each with its own speed: among these types of wave are longitudinal (as in fluids), transversal, and (along a surface or plate) extensional.
E172 would be the end of period 8 ("noble gas") and E173 would be the beginning of period 9. {{ Index by periodic table }} · Category:Hypothetical chemical elements (75) Subtemplates
This staining method may also be known in the literature as the OTO [23] [24] (osmium-thiocarbohydrazide-osmium) method, or osmium impregnation [25] technique or simply as osmium staining. As a lipid stain, it is also useful in scanning electron microscopy (SEM) as an alternative to sputter coating. It embeds a heavy metal directly into cell ...
So a ±1 °C temperature deviation will account for a (±1) 2 × −0.035 ppm = −0.035 ppm rate change, which is equivalent to −1.1 seconds per year. If, instead, the crystal experiences a ±10 °C temperature deviation, then the rate change will be (±10) 2 × −0.035 ppm = −3.5 ppm, which is equivalent to −110 seconds per year.