Difference between revisions of "Holmium citrate"

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[[File:Ho_juxta.png|thumb|256px|Holmium citrate under LED and CFL lighting.]]
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'''Holmium citrate''' is the [[holmium]] salt of [[citric acid]]. It is prepared by addition of a stoichiometric amount of holmium metal to a citric acid solution. It is yellow in sunlight, incandescent light, or LED light and bright pink under the light of compact fluorescent lights.
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| Name = Holmium citrate
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| IUPACName = Holmium(III) 2-hydroxypropane-1,2,3-tricarboxylate
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| SystematicName = Holmium(III) citrate
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| Section1 = {{Chembox Identifiers
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| Section2 = {{Chembox Properties
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| Appearance = Yellow or pink solid (depending on the illumination source)
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| BoilingPt_notes = Decomposes
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| Formula = C<sub>6</sub>H<sub>5</sub>O<sub>7</sub>Ho
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| MolarMass = 354.03002 g/mol
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| MeltingPtC = 309.6
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| MeltingPt_notes = (decomposes)
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| Odor = Odorless
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| Solubility = Soluble
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| SolubleOther = Insoluble in halocarbons, hydrocarbons
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| VaporPressure = ~0 mmHg
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'''Holmium citrate''' ('''C<sub>6</sub>H<sub>5</sub>O<sub>7</sub>Ho''') is the [[holmium]] salt of [[citric acid]]. It is prepared by addition of a stoichiometric amount of holmium metal to a citric acid solution. It is yellow in sunlight, incandescent light, or LED light and bright pink under the light of compact fluorescent lights.
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==Properties==
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===Chemical===
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Heating holmium citrate will cause it to decompose, yielding carbon oxides and leaving behind holmium carbonate or oxide.
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===Physical===
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Holmium citrate changes its color depending on the light source.<ref>https://www.youtube.com/watch?v=jhepi81HBqE</ref>
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==Preparation==
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Adding holmium metal to citric acid solution yields holmium citrate.
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==Projects==
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*Color changing solution
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*Catalyst for polyester production<ref>http://www.google.com/patents/CN100469814C?cl=en</ref>
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==Handling==
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===Safety===
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The compound appears to be safe to handle without protection. Holmium has a low level of acute toxicity, and large amounts are needed to cause toxic effects.
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===Storage===
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Should be kept in closed containers, as it absorbs water from air.
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===Disposal===
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Since holmium is expensive, it's best to try to recycle it.
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==References==
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<references/>
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===Relevant Sciencemadness threads===
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*[http://www.sciencemadness.org/talk/viewthread.php?tid=62478 Rare earth citrate production]
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[[Category:Chemical compounds]]
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[[Category:Organic compounds]]
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[[Category:Lanthanide compounds]]
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[[Category:Holmium compounds]]
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[[Category:Citrates]]
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[[Category:Fluorescent materials]]
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[[Category:Easily prepared chemicals]]

Latest revision as of 19:41, 27 December 2023

Holmium citrate
Holmium citrate LED and CFL light by Brain&Force.png
Holmium citrate under LED and CFL lighting.
Names
IUPAC name
Holmium(III) 2-hydroxypropane-1,2,3-tricarboxylate
Systematic IUPAC name
Holmium(III) citrate
Properties
C6H5O7Ho
Molar mass 354.03002 g/mol
Appearance Yellow or pink solid (depending on the illumination source)
Odor Odorless
Melting point 309.6 °C (589.3 °F; 582.8 K) (decomposes)
Boiling point Decomposes
Soluble
Solubility Insoluble in halocarbons, hydrocarbons
Vapor pressure ~0 mmHg
Hazards
Safety data sheet None
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
Stub.png This article is a stub. Please help Sciencemadness Wiki by expanding it, adding pictures, and improving existing text.

Holmium citrate (C6H5O7Ho) is the holmium salt of citric acid. It is prepared by addition of a stoichiometric amount of holmium metal to a citric acid solution. It is yellow in sunlight, incandescent light, or LED light and bright pink under the light of compact fluorescent lights.

Properties

Chemical

Heating holmium citrate will cause it to decompose, yielding carbon oxides and leaving behind holmium carbonate or oxide.

Physical

Holmium citrate changes its color depending on the light source.[1]

Preparation

Adding holmium metal to citric acid solution yields holmium citrate.

Projects

  • Color changing solution
  • Catalyst for polyester production[2]

Handling

Safety

The compound appears to be safe to handle without protection. Holmium has a low level of acute toxicity, and large amounts are needed to cause toxic effects.

Storage

Should be kept in closed containers, as it absorbs water from air.

Disposal

Since holmium is expensive, it's best to try to recycle it.

References

  1. ↑ https://www.youtube.com/watch?v=jhepi81HBqE
  2. ↑ http://www.google.com/patents/CN100469814C?cl=en

Relevant Sciencemadness threads

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