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Crystals can be identified based on their appearance and the pH of the urine (many types preferentially form at an acidic or alkaline pH). [123] Crystals that can be found in normal urine include uric acid , monosodium urate, triple phosphate ( ammonium magnesium phosphate ), calcium oxalate , and calcium carbonate . [ 124 ]
Uric acid is a heterocyclic compound of carbon, nitrogen, oxygen, and hydrogen with the formula C 5 H 4 N 4 O 3.It forms ions and salts known as urates and acid urates, such as ammonium acid urate.
Struvite (magnesium ammonium phosphate) is a phosphate mineral with formula: NH 4 MgPO 4 ·6H 2 O. Struvite crystallizes in the orthorhombic system as white to yellowish or brownish-white pyramidal crystals or in platy mica-like forms.
Ammonium dicyanoaurate is a chemical compound with the chemical formula C 2 H 4 AuN 3. [2] This is a salt of ammonium as cation with an anion composed of a gold atom bearing two cyanide ligands.
The pH range is commonly given as zero to 14, but a pH value can be less than 0 for very concentrated strong acids or greater than 14 for very concentrated strong bases. [2] The pH scale is traceable to a set of standard solutions whose pH is established by international agreement. [3]
It is precipitated by adding aqueous ammonium hydroxide after uranium extraction by tertiary amines in kerosene. This precipitate is then thickened and centrifuged before being calcined to uranium oxide. Canadian practice favours the production of uranium oxide from ammonium diuranate, rather than from uranyl nitrate as is the case elsewhere.
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Ammonium is a modified form of ammonia that has an extra hydrogen atom. It is a positively charged molecular ion with the chemical formula NH + 4 or [NH 4] +.It is formed by the addition of a proton (a hydrogen nucleus) to ammonia (NH 3).