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Europium(III) chloride is an inorganic compound with the formula EuCl3. The anhydrous compound is a yellow solid. Being hygroscopic it rapidly absorbs water to form a white crystalline hexahydrate, EuCl3·6H2O, which is colourless. The compound is used in research.
Ammonium hydrosulfide is the chemical compound with the formula [NH4]SH.
Terbium(III,IV) oxide, occasionally called tetraterbium heptaoxide, has the formula Tb4O7, though some texts refer to it as TbO1.75. There is some debate as to whether it is a discrete compound, or simply one phase in an interstitial oxide system. Tb4O7 is one of the main commercial terbium compounds, and the only such product containing at least some Tb(IV) (terbium in the +4 oxidation state), along with the more stable Tb(III). It is produced by heating the metal oxalate, and it is used in the preparation of other terbium compounds. It is also used in Electronics and Data Storage, Green Energy Technologies, Medical Imaging and Diagnosis, and Chemical Processes. Terbium forms three other major oxides: Tb2O3, TbO2, and Tb6O11.
Erbium(III) chloride is a violet solid with the formula ErCl3. It is used in the preparation of erbium metal.
Ammonium perrhenate (APR) is the ammonium salt of perrhenic acid, NH4ReO4. It is the most common form in which rhenium is traded. It is a white salt; soluble in ethanol and water, and mildly soluble in NH4Cl. It was first described soon after the discovery of rhenium.
Ytterbium(III) chloride (YbCl3) is an inorganic chemical compound. It reacts with NiCl2 to form a very effective catalyst for the reductive dehalogenation of aryl halides. It is poisonous if injected, and mildly toxic by ingestion. It is an experimental teratogen, known to irritate the skin and eyes.
Zinc pyrophosphate (Zn2P2O7) is an ionic inorganic chemical compound composed of Zn2+ cations and pyrophosphate anions.
Ammonium hexachloroplatinate, also known as ammonium chloroplatinate, is the inorganic compound with the formula (NH4)2[PtCl6]. It is a rare example of a soluble platinum(IV) salt that is not hygroscopic. It forms intensely yellow solutions in water. In the presence of 1M NH4Cl, its solubility is only 0.0028 g/100 mL.
Ammonium dichromate is an inorganic compound with the formula (NH4)2Cr2O7. In this compound, as in all chromates and dichromates, chromium is in a +6 oxidation state, commonly known as hexavalent chromium. It is a salt consisting of ammonium ions and dichromate ions.
Ammonium fluorosilicate (also known as ammonium hexafluorosilicate, ammonium fluosilicate or ammonium silicofluoride) has the formula (NH4)2SiF6. It is a toxic chemical, like all salts of fluorosilicic acid. It is made of white crystals, which have at least three polymorphs and appears in nature as rare minerals cryptohalite or bararite.
Lead tetrachloride, also known as lead(IV) chloride, has the molecular formula PbCl4. It is a yellow, oily liquid which is stable below 0 °C, and decomposes at 50 °C. It has a tetrahedral configuration, with lead as the central atom. The Pb–Cl covalent bonds have been measured to be 247 pm and the bond energy is 243 kJ⋅mol−1.
Langbeinites are a family of crystalline substances based on the structure of langbeinite with general formula M2M'2(SO4)3, where M is a large univalent cation, and M' is a small divalent cation. The sulfate group, SO2−4, can be substituted by other tetrahedral anions with a double negative charge such as tetrafluoroberyllate, selenate, chromate, molybdate, or tungstates. Although monofluorophosphates are predicted, they have not been described. By redistributing charges other anions with the same shape such as phosphate also form langbeinite structures. In these the M' atom must have a greater charge to balance the extra three negative charges.
Monofluorophosphate is an anion with the formula PO3F2−, which is a phosphate group with one oxygen atom substituted with a fluoride atom. The charge of the ion is −2. The ion resembles sulfate in size, shape and charge, and can thus form compounds with the same structure as sulfates. These include Tutton's salts and langbeinites. The most well-known compound of monofluorophosphate is sodium monofluorophosphate, commonly used in toothpaste.
In chemistry, a transition metal chloride complex is a coordination complex that consists of a transition metal coordinated to one or more chloride ligand. The class of complexes is extensive.
Ammonium hexachlorotellurate is an inorganic chemical compound with the chemical formula [NH4]2[TeCl6].
Ammonium hexachlorostannate is an inorganic chemical compound with the chemical formula (NH4)2SnCl6.
Ammonium hexafluoroindate is an inorganic chemical compound with the chemical formula (NH4)3InF6.
Ammonium hexachlororhenate is an inorganic chemical compound with the chemical formula (NH4)2ReCl6.
Ammonium hexachloroplumbate is an inorganic chemical compound with the chemical formula (NH4)2PbCl6.
Ammonium hexachloropalladate is an inorganic chemical compound with the chemical formula (NH4)2PdCl6.
References
- ↑ Macintyre, Jane E. (23 July 1992). Dictionary of Inorganic Compounds. CRC Press. p. 2993. ISBN 978-0-412-30120-9 . Retrieved 7 October 2024.
- ↑ Kume, Yoshio; Muraoka, Hiroki; Matsuo, Takasuke; Suga, Hiroshi (1 February 1994). "Low-temperature heat capacities of ammonium hexachloroselenate and of its deuterated analogue". The Journal of Chemical Thermodynamics . 26 (2): 211–222. doi:10.1006/jcht.1994.1041. ISSN 0021-9614 . Retrieved 7 October 2024.
- ↑ Kudri︠a︡vt︠s︡ev, Aleksandr Andreevich (1974). The Chemistry & Technology of Selenium and Tellurium. Collet's. p. 105. ISBN 978-0-569-08009-5 . Retrieved 7 October 2024.
- ↑ Donnay, Joseph Désiré Hubert (1973). Crystal Data: Inorganic compounds. National Bureau of Standards . Retrieved 7 October 2024.
- ↑ Prager, M; Raaen, A M; Svare, I (28 February 1983). "Tunnel splittings in ammonium hexachlorides". Journal of Physics C: Solid State Physics . 16 (6): L181–L186. doi:10.1088/0022-3719/16/6/002 . Retrieved 7 October 2024.
- ↑ Pelzl, J.; Dimitropoulos, C. (1 February 1994). "Effect of Deuteration on the Phase Transitions and on the Critical Dynamics in Ammonium Hexachlorometallates". Zeitschrift für Naturforschung A . 49 (1–2): 232–246. doi:10.1515/zna-1994-1-235.