Wikipedia:Reference desk/Archives/Science/2019 August 25

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August 25

Metal ammine complex for iron

Can ferrous hydroxide solution (freshly prepared) form ammine complex on adding ammonia solution? If not, how can an iron ammine complex be obtained? Thanks!--93.122.251.81 (talk) 01:31, 25 August 2019 (UTC)

Iron ammine complexes can be formed by adding liquid ammonia to anhydrous ferrous compounds. It can yield a hexaammine. The problem if you have water or hydroxide around is that you form the highly insoluble iron hydroxides. You may also be able to get some ammine action with aqueous ammonia that is saturated with ammonia at lowish temperature. This should be easier to handle than fully liquid ammonia, but safety precautions have to be taken because of fumes and caustic nature. This is from Advanced Inorganic Chemistry by Cotton and Wilkinson Graeme Bartlett (talk) 06:41, 25 August 2019 (UTC)

This paper https://doi.org/10.1021/i260041a028 talks about how much ammonia with water it takes to make an ammine complex out of ferrous hydroxide. You can get around 60 g/l of iron as an ammine complex dissolved. Graeme Bartlett (talk) 06:57, 25 August 2019 (UTC)

Alkali metals alloys with Fe

Are there any data regarding the properties of (binary) alloys of iron with alkali metals (Li, Na, K, Cs,...)? (Thanks!)--93.122.248.53 (talk) 18:30, 25 August 2019 (UTC)

One problem is that the alkali metals are vapour before iron melts. However under pressure something may happen. eg here: https://doi.org/10.1016/j.pepi.2006.08.005 potassium can be 25 ppm in molten iron. Graeme Bartlett (talk) 00:42, 26 August 2019 (UTC)

How about the use of iron powder to be mixed with solid alkali metals (at normal pressures), perhaps by using powder metallurgy? Is there any data re miscibility in solid state?--93.122.248.53 (talk) 13:26, 26 August 2019 (UTC)

This seems relevant to the OP's research; it list the solubility of various metals (from Beryllium to Osmium) and their solubility in various liquid alkali metals. Even though they are not liquid at the same temperature ranges, presumably if you can get the solid iron to dissolve in liquid alkali metal, you can then cool the system and create some sort of alloy. --Jayron32 14:03, 26 August 2019 (UTC)

Amalgams are made by dissolving solid [metal] in liquid mercury, with no need to melt [metal] first. Here's a report of an alloy that includes both scandium (mp 1814 K) and lithium (bp 1603 K). DMacks (talk) 23:21, 26 August 2019 (UTC)

Since the alkali metal vapours have been mentioned above, what can said about sparging/bubbling some alkali metal vapour through molten iron (of course in an atmosphere without oxygen), than followed by solidification?--93.122.248.53 (talk) 14:30, 26 August 2019 (UTC)

Iron-Binary Phase Diagrams by O. Kubaschewski may give some information, in particular, solubility at different temperatures. At Amazon here [1] and Google Books here [2].--Wikimedes (talk) 17:14, 28 August 2019 (UTC)

Information on New Zealand meteorologist N. G. Robertson

New Zealand meterologist N. G. Robertson is the author of several publications. His full name is Neil George Robertson, and he "Assistant Director (Climatology), Meteorological Service, Department of Civil Aviation, Wellington". But is there any chance to find basic biographical data and information him? --KnightMove (talk) 22:10, 25 August 2019 (UTC)