Synthesis and structure of NH4CoPO46H2O

Touaiher, M.; Bettach, Mohammed; Benkhouja, K.; Zahir, Md. Hasan; Aranda, Miguel Á. G.; Bruque, S.

doi:10.1016/s0151-9107(01)80060-x

Cited by 8 publications

(2 citation statements)

References 7 publications

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“…According to published data, the most widely used methods for obtaining MAPs from aqueous solutions under normal pressure at room or comparatively low temperature (20 to 100°C) in laboratory or industrial conditions are those in which salt solutions of the corresponding metal and ammonium phosphates with varied degree of substitution are mixed [41][42][43][44][45][46][47] and metal oxides, hydroxides, or salts are reacted with phosphoric acid, with the subsequent neutralization of the metal phosphate solution under vigorous agitation [48][49][50][51]. It should be noted that the exchange interaction of metal salts with soluble phosphates of ammonium or alkali metals is widely used in laboratory practice for obtaining individual metal phosphate salts.…”

Section: Synthesis Conditions and Properties Of Metal(ii)-ammonium Ph...mentioning

confidence: 99%

“…It has been found experimentally [42,61] that there are signifi cant differences in thermal behavior between anhydrous and hydrated phosphates of divalent metals (Mg, Zn, Cu, Co, Ni, Mn) and ammonium: depending on the amount of hydration water, they undergo transformations in different temperature ranges. The thermal decomposition of anhydrous MAPs of the above divalent metals begins at temperatures higher than 350°C, and that of monohydrates, beginning at 130-260°C [43].…”

Section: Synthesis Conditions and Properties Of Metal(ii)-ammonium Ph...mentioning

confidence: 99%

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Synthesis and physicochemical properties of Di- and trivalent metal-ammonium phosphates

Богданова

Кобец

2014

Russ J Appl Chem

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Data on the infl uence exerted by the synthesis conditions and by the nature and relative amounts of precursor reagents on the properties of metal-ammonium phosphates, promising as components of fi re-retardant and fi re-extinguishing additives, are summarized and analyzed. The manner in which the solution pH and nature and relative amounts of the reacting metal-, nitrogen-, and phosphorus-containing compounds affect the phase composition, solubility, aggregative state, and fundamental aspects of thermal transformations of products being synthesized on the basis of di-and trivalent metal-ammonium phosphates in a wide temperature range is determined.

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Section: Synthesis Conditions and Properties Of Metal(ii)-ammonium Ph...mentioning

confidence: 99%

Section: Synthesis Conditions and Properties Of Metal(ii)-ammonium Ph...mentioning

confidence: 99%

Synthesis and physicochemical properties of Di- and trivalent metal-ammonium phosphates

Богданова

Кобец

2014

Russ J Appl Chem

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Heat repellent behavior of cobalt‐based imidazole containing phosphate and meta‐phosphate complex mixtures

2021

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Four different mixtures such as complex mixture A, [Co(H 2 O) 4 (HPO 4 )] (C 3 H 4 N 2 )(H 2 O) 2 Á 0.2 (C 3 H 4 N 2 ), complex mixture B, [Co(H 2 O) 6 ](H 2 PO 4 )(OH) (H 2 O) Á(C 3 H 4 N 2 ) 2 , mixture C, 0.34 Co(PO 3 ) 2 Á0.15(C 3 H 3 N 2 Na), and complex mixture D, 0.03Co(PO 3 ) 2 Á0.25(C 3 H 3 N 2 Na) Á0.1 [Co(H 2 O) 6 ]SO 4 .H 2 OÁ0.6 (C 3 H 4 N 2 ), were synthesized using ortho-phosphoric acid and meta-phosphoric acid with cobalt sulfate heptahydrate and imidazole in ambient conditions. These mixtures have been well characterized by different thermo-analytical techniques. Differential Scanning Calorimetry (DSC) has been carried out at different heating rates such as 5, 10, 20, and 30 K min −1 at atmospheric conditions. The specific heat capacity was measured at low temperatures up to 173 K for mixture C at a rate of 10 K min −1 . From the thermal analysis, it can be observed that the complex mixtures A and B prepared using phosphoric acid and mixture C prepared using meta-phosphoric acid behave as heat repellent material owing to their exothermic behavior at high temperature. The anomalous negative specific heat capacity exhibited by the mixtures is explained using partial molar quantities. Among all the four complex mixtures, the complex mixture A has been found to be the best heat repellent material.The complex mixture B can be used as heat storage material up to temperature $550 K due to its endothermic behavior. These phosphate materials can be used for longer period of time due to their stability and insolubility in aqueous media. The heat can be extracted from any system that is coated with these phosphate mixtures using high conductivity copper rod. K E Y W O R D SDSC, heat repellent material, negative heat capacity, partial molar quantities | INTRODUCTIONConsumption of energy has increased exponentially over the years in all aspects of human life. Because of this, the modern technological man is striving hard to explore all possible options to cater to the ever-increasing demand for energy. Conventional energy reserves, viz. coal and fossil fuels, have already been exploited to their maximum extent and their collateral impacts of environmental pollution and global warming leading to climate change. It is indeed essential to scout around various viable sources of renewable energy, such as extracting

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Preparation, Structural, Thermogravimetric and Spectroscopic Study of Magnesium Potassium Arsenate Hexahydrate

Abdija¹,

Najdoski²,

Koleva³

et al. 2014

Zeitschrift anorg allge chemie

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The crystal structure of magnesium potassium arsenate hexahydrate, MgKAsO 4 ·6H 2 O, was refined from powder diffraction data. MgKAsO 4 ·6H 2 O crystallizes in the orthorhombic space group Pmn2 1 with Z = 2, as the biomineral struvite. Complete dehydration of MgKAsO 4 ·6H 2 O proceeds in a single step, with one endothermic * Prof. Dr. V. Stefov Fax: +389-23226-865 E-Mail: viktorst@pmf.ukim.mk [a]

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Synthesis and structure of NH4CoPO46H2O

Cited by 8 publications

References 7 publications

Synthesis and physicochemical properties of Di- and trivalent metal-ammonium phosphates

Synthesis and physicochemical properties of Di- and trivalent metal-ammonium phosphates

Heat repellent behavior of cobalt‐based imidazole containing phosphate and meta‐phosphate complex mixtures

Preparation, Structural, Thermogravimetric and Spectroscopic Study of Magnesium Potassium Arsenate Hexahydrate

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