Yttrium oxalate

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Yttrium oxalate
Yttrium oxalate.png
Other names
Yttrium(3+) oxalate, Diyttrium trioxalate
  • 867-68-5 Yes check.svgY
3D model (JSmol)
ECHA InfoCard 100.011.607 OOjs UI icon edit-ltr-progressive.svg
EC Number
  • 212-767-0
PubChem CID
  • InChI=1S/3C2H2O4.H2O.2Y/c3*3-1(4)2(5)6;;;/h3*(H,3,4)(H,5,6);1H2;;/q;;;;2*+3/p-6
  • [Y+3].[Y+3].O=C([O-])C([O-])=O.[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O
Molar mass 441.87
AppearanceWhite crystals
GHS labelling:
H302, H302+H312, H312 [1]
P264, P270, P280, P301+P312, P302+P352, P312, P322, P330, P363, P501
Related compounds
Related compounds
Calcium oxalate
Sodium oxalate
Magnesium oxalate
Strontium oxalate
Barium oxalate
Iron(II) oxalate
Iron(III) oxalate
Lithium oxalate
Praseodymium oxalate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Yttrium oxalate is an inorganic compound, a salt of yttrium and oxalic acid with the chemical formula Y2(C2O4)3. [2] The compound does not dissolve in water and forms crystalline hydrates—colorless crystals. [3]



Precipitation of soluble yttrium salts with oxalic acid: [4]


Yttrium oxalate is highly insoluble in water and converts to the oxide when heated. [5] Yttrium oxalate forms crystalline hydrates (colorless crystals) with the formula Y2(C2O4)3n H2O, where n = 4, 9, and 10.

Decomposes when heated:

The solubility product of yttrium oxalate at 25°C is 5.1 × 10−30. [6]

The trihydrate Y2(C2O4)3•3H2O is formed by heating more hydrated varieties at 110°C. [7]

Y2(C2O4)3•2H2O, which is formed by heating the decahydrate at 210°C) forms monoclinic crystals with unit cell dimensions a=9.3811 Å, b=11.638 Å, c=5.9726 Å, β=96.079°. [8]

Several yttrium oxalate double salts are known containing additional cations. Also a mixed-anion compound with carbonate is known.

formulanameformula weightcrystal formspace groupunit cell Åvolume Å3propertiesreferences
NH4Y(C2O4)2.H2OAmmonium yttrium oxalate monohydrate monoclinic P2/na=9.18 b=6.09 c=7.89 β=90.2 Z=2 [9]
[C6N2H16]0.5[Y(H2O)(C2O4)2]·2H2O377.1triclinicP1a = 8.229, b = 9.739, c = 9.754, α = 60.74, β = 72.36, γ = 84.67°, Z = 2648.5density 1.931 [10]
[C5N2H12][Y(C2O4)2]365.1monoclinicCca = 11.552, b = 17.168, c = 8.719, β = 130.64°, Z = 21312.1density 1.848 [10]
C5NH6Y(C2O4)2•3H2OPyridinium yttrium oxalate trihydrate [11]
[Y(H2O)]Na(C2O4)2.3H2Oyttrium sodium oxalate tetrahydrate360.005monoclinicPca=8.623 b=8.6310 c=14.896 β=102.848 Z=41080.9 [12]
YK(C2O4)2.4H2OYttrium potassium oxalate tetrahydrate tetragonal I41/aZ = 4 a = 11.4612, c = 8.90401169.6 [13] [14]
Y(H2O)Cs(C2O4)2Caesium yttrium oxalate monohydratemonoclinicP2/na = 8.979, b = 6.2299, c = 8.103, β = 90.05°453.3 [15]
RbLn(C2O4)2•3H2ORubidium yttrium oxalate trihydrate [16]
[Y(H2O)]2(C2O4)(CO3)2yttrium oxalate carbonate421.876orthorhombicC2221a = 7.8177, b = 14.943, c = 9.4845, Z = 41108.0density 2.526 [17]

Related Research Articles

Oxalic acid Simplest dicarboxylic acid

Oxalic acid is an organic acid with the IUPAC name ethanedioic acid and formula HO2C−CO2H. It is the simplest dicarboxylic acid. It is a white crystalline solid that forms a colorless solution in water. Its name comes from the fact that early investigators isolated oxalic acid from flowering plants of the genus Oxalis, commonly known as wood-sorrels. It occurs naturally in many foods, but excessive ingestion of oxalic acid or prolonged skin contact can be dangerous.

Oxalate Any derivative of oxalic acid; chemical compound containing oxalate moiety

Oxalate (IUPAC: ethanedioate) is an anion with the formula C2O42−. This dianion is colorless. It occurs naturally, including in some foods. It forms a variety of salts, for example sodium oxalate (Na2C2O4), and several esters such as dimethyl oxalate (C2O4(CH3)2). It is a conjugate base of oxalic acid. At neutral pH in aqueous solution, oxalic acid converts completely to oxalate.

Water of crystallization

In chemistry, water(s) of crystallization or water(s) of hydration are water molecules that are present inside crystals. Water is often incorporated in the formation of crystals from aqueous solutions. In some contexts, water of crystallization is the total mass of water in a substance at a given temperature and is mostly present in a definite (stoichiometric) ratio. Classically, "water of crystallization" refers to water that is found in the crystalline framework of a metal complex or a salt, which is not directly bonded to the metal cation.

Iron(II) fluoride Chemical compound

Iron(II) fluoride or ferrous fluoride is an inorganic compound with the molecular formula FeF2. It forms a tetrahydrate FeF2·4H2O that is often referred to by the same names. The anhydrous and hydrated forms are white crystalline solids.

Uranyl chloride Chemical compound

Uranyl chloride refers to inorganic compounds with the formula UO2Cl2(H2O)n where n = 0, 1, or 3. These are yellow-colored solids.

Sodium formate Chemical compound

Sodium formate, HCOONa, is the sodium salt of formic acid, HCOOH. It usually appears as a white deliquescent powder.

Tutton's salts are a family of salts with the formula M2M'(SO4)2(H2O)6 (sulfates) or M2M'(SeO4)2(H2O)6 (selenates). These materials are double salts, which means that they contain two different cations, M+ and M'2+ crystallized in the same regular ionic lattice. The univalent cation can be potassium, rubidium, cesium, ammonium (NH4), deuterated ammonium (ND4) or thallium. Sodium or lithium ions are too small. The divalent cation can be magnesium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc or cadmium. In addition to sulfate and selenate, the divalent anion can be chromate (CrO42−), tetrafluoroberyllate (BeF42−), hydrogenphosphate (HPO42−) or monofluorophosphate (PO3F2−). Tutton's salts crystallize in the monoclinic space group P21/a. The robustness is the result of the complementary hydrogen-bonding between the tetrahedral anions and cations as well their interactions with the metal aquo complex [M(H2O)6]2+.

Yttrium borides Chemical compound

Yttrium boride refers to a crystalline material composed of different proportions of yttrium and boron, such as YB2, YB4, YB6, YB12, YB25, YB50 and YB66. They are all gray-colored, hard solids having high melting temperatures. The most common form is the yttrium hexaboride YB6. It exhibits superconductivity at relatively high temperature of 8.4 K and, similar to LaB6, is an electron cathode. Another remarkable yttrium boride is YB66. It has a large lattice constant (2.344 nm), high thermal and mechanical stability, and therefore is used as a diffraction grating for low-energy synchrotron radiation (1–2 keV).

Hydrogenoxalate Ion

Hydrogenoxalate or hydrogen oxalate is an anion with chemical formula HC
or HO
, derived from oxalic acid by the loss of a single proton; or, alternatively, from the oxalate anion C
by addition of a proton.

Chromium(II) oxalate is an inorganic compound with the chemical formula CrC2O4.

Cerium nitrate Chemical compound

Cerium nitrate refers to a family of nitrates of cerium in the three or four oxidation state. Often these compounds contain water, hydroxide, or hydronium ions in addition to cerium and nitrate. Double nitrates of cerium also exist.

Thorium(IV) nitrate Chemical compound

Thorium(IV) nitrate is a chemical compound with the formula Th(NO3)4. A white solid in its anhydrous form, it can form tetra- and pentahydrates. As a salt of thorium it is weakly radioactive.

Caesium oxalate (standard IUPAC spelling) dicesium oxalate, or cesium oxalate (American spelling) is the oxalate of caesium. Caesium oxalate has the chemical formula of Cs2C2O4.

The nickel organic acid salts are organic acid salts of nickel. In many of these the ionised organic acid acts as a ligand.

An yttrium compound is a chemical compound containing yttrium. Among these compounds, yttrium generally has a +3 valence. The solubility properties of yttrium compounds are similar to those of the lanthanides. For example oxalates and carbonates are hardly soluble in water, but soluble in excess oxalate or carbonate solutions as complexes are formed. Sulfates and double sulfates are generally soluble. They resemble the "yttrium group" of heavy lanathanide elements.

Uranyl oxalate Chemical compound

Uranyl oxalate (UO2C2O4) is a pale yellow powdered uranyl compound. It is often encountered in industrial nuclear processes at both the front and back-end of the nuclear fuel cycle. Due to its hygroscopicity, uranyl oxalate rarely exists in the dehydrated state and is usually instead found in the trihydrate form (UO2C2O4·3H2O) at room temperature. At room temperature, the powder exhibits a monoclinic crystal structure in the P21/c space group.

The borate oxalates are chemical compounds containing borate and oxalate anions. Where the oxalate group is bound to the borate via oxygen, a more condensed anion is formed that balances less cations. These can be termed boro-oxalates, bis(oxalato)borates, or oxalatoborates or oxalate borates. The oxalatoborates are heterocyclic compounds with a ring containing -O-B-O-. Bis(oxalato)borates are spiro compounds with rings joined at the boron atom.

Praseodymium oxalate is an inorganic compound, a salt of praseodymium metal and oxalic acid with the chemical formula C6O12Pr2. The compound forms light green crystals, insoluble in water, also forms crystalline hydrates.

The carbonate oxalates are mixed anion compounds that contain both carbonate (CO3) and oxalate (C2O4) anions. Most compounds incorporate large trivalent metal ions, such as the rare earth elements. Some carbonate oxalate compounds of variable composition are formed by heating oxalates.

Samarium(III) oxalate is an inorganic compound, a salt of samarium and oxalic acid with the formula Sm2(C2O4)3. The compound does not dissolve in water, forms a crystalline hydrate with yellow crystals.


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