Wikipedia:Featured picture candidates/Rubidium and caesium crystals

Rubidium and caesium crystals
Voting period ends on 15 Feb 2019  at 19:53:57 (UTC)
 * Reason:This single visually striking image illustrates multiple chemical aspects of these two heavy alkali metals: their fierce reactivity, which requires them to be confined within glass ampules; their metallic luster due to electron delocalization, which illustrates their character as true metals; their low melting points, allowing them to liquefy just above room temperature (caesium) or just above human body temperature (rubidium); their tendency to form dendritic crystals; and the relativistic effect that gives a golden hue to the heavier of the two (caesium), but not the lighter (rubidium). This multifaceted educational value enables this image to add to the communicative power of at least five different Wikipedia pages.
 * Articles in which this image appears:Caesium, Relativistic quantum chemistry, Rubidium, Dendrite (metal), Dendrite (crystal)
 * FP category for this image:WP:Featured pictures/Sciences/Materials science
 * Creator:ErpingWu


 * Support as nominator – Syrenka V (talk) 19:53, 5 February 2019 (UTC)
 * Comment Is that paper with 7mm or 5mm squares? Or perhaps imperial measures? Need to know... ;-) Also, DOF a bit shallow, a tilt and shift lens shot would have been sharper overall. --Janke | Talk 20:43, 5 February 2019 (UTC)
 * Janke, contents are 5 grams and densities are known, so volumes are known. Using that, I did a check, 7mm grid doesn't fit the photo at all. 10mm grid does. 9 and 11mm also fit but not as nicely as 10. So I think it is 10mm. Bammesk (talk) 02:09, 7 February 2019 (UTC)


 * I sharpened the front portion of the image and did an upload. The sharpening is tapered vertically over three steps. Feel free to revert, improve and comment on the upload. Support, EV per nom reason, it shows the solid, liquid, crystal states at the same time. Bammesk (talk) 03:44, 6 February 2019 (UTC)
 * Weak oppose - unfortunately some of the unsharpness is also due to JPEG artifacts in the original, and the sharpening has made them worse. The composition and subject are, however, FP worthy. MER-C 18:48, 6 February 2019 (UTC)
 * Support --Yann (talk) 14:07, 7 February 2019 (UTC)
 * Oppose The Rubidium's fantastic, but I can't get over the Caesium's blurriness, even after fixes. Adam Cuerden (talk)Has about 6.3% of all FPs 02:34, 15 February 2019 (UTC)

--Armbrust The Homunculus 20:33, 15 February 2019 (UTC)