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#POTASSIUM ELEMENT CARD UPDATE#

K) 83 Thermal Conductivity 102.4 Specific Heat 0.75 Heat of Fusion 2.334 Heat of Vaporization 79.87 Atomic Number of Potassium.PMID 16194637.Potassium – Properties Element Potassium Atomic Number 19 Symbol K Element Category Alkali Metal Phase at STP Solid Atomic Mass 39.0983 Density at STP 0.856 Electron Configuration 4s1 Possible Oxidation States +1 Electron Affinity 48.4 Electronegativity 0.82 1st Ionization Energy 4.3407 Year of Discovery 1807 Discoverer Davy, Sir Humphry Thermal properties Melting Point 63.25 Boiling Point 760 Thermal Expansion µm/(m

#POTASSIUM ELEMENT CARD UPDATE#

"Hypophosphatemia: an update on its etiology and treatment". Journal of the Physical Society of Japan. "X-Ray Study of High-Temperature Phase Transitions in KH 2PO 4".

^ a b Itoh, Kazuyuki Matsubayashi, Tetsuo Nakamura, Eiji Motegi, Hiroshi (1975).

"Refinement of the Crystal Structure of KH 2PO 4 in the Ferroelectric Phase". Ullmann's Encyclopedia of Industrial Chemistry.

^ Klaus Schrödter Gerhard Bettermann Thomas Staffel Friedrich Wahl Thomas Klein Thomas Hofmann (2012).

^ a b c d "Potassium Dihydrogen Phosphate".

"Phase Transitions in Mixed Crystal System K 1−x(NH 4) xH 2PO 4".

^ a b Ono, Yasuhiro Hikita, Tomoyuki Ikeda, Takuro (1987).

Redwood City, CA: Benjamin/Cummings Pub., 1990.

^ a b "Commission Regulation (EU) No 231/2012 of 9 March 2012 laying down specifications for food additives listed in Annexes II and III to Regulation (EC) No 1333/2008 of the European Parliament and of the Council Text with EEA relevance".

In medicine, monopotassium phosphate is used for phosphate substitution in hypophosphatemia. Monopotassium phosphate is also used as an ingredient in sports drinks such as Gatorade and Powerade. Regular KDP has absorbances at this wavelength of approximately 4.7–6.3% per cm of thickness while highly deuterated KDP has absorbances of typically less than 0.8% per cm. Highly deuterated KDP is used in nonlinear frequency conversion of laser light instead of protonated (regular) KDP due to the fact that the replacement of protons with deuterons in the crystal shifts the third overtone of the strong OH molecular stretch to longer wavelengths, moving it mostly out of the range of the fundamental line at approximately 1064 nm of neodymium-based lasers. It is used in optical modulators and for non-linear optics such as second-harmonic generation (SHG).Īlso to be noted is KD*P, potassium dideuterium phosphate, with slightly different properties.

MKP powder is often used as a nutrient source in the greenhouse trade and in hydroponics.Īs a crystal, MKP is noted for its non-linear optical properties. Monopotassium phosphate is produced by the action of phosphoric acid on potassium carbonate.įertilizer-grade MKP powder contains the equivalent of 52% PĢO, and is labeled NPK 0-52-34. When heated further, MKP decomposes, by loss of water, to potassium metaphosphate, KPO Heating to 190 ☌ (374 ☏) changes its structure to monoclinic. Upon cooling to −150 ☌ (−238 ☏) it transforms to a ferroelectric phase of orthorhombic symmetry, and the transition temperature shifts up to −50 ☌ (−58 ☏) when hydrogen is replaced by deuterium. At room temperature it forms paraelectric crystals with tetragonal symmetry. Monopotassium phosphate can exist in several polymorphs. At temperatures below −150 ☌ (−238 ☏), they become ferroelectric. Single crystals are paraelectric at room temperature. The salt often cocrystallizes with the dipotassium salt as well as with phosphoric acid. (H 2O) x) it is often used as a fertilizer, food additive, and buffering agent. Together with dipotassium phosphate (K 2HPO 4. Monopotassium phosphate ( MKP) (also, potassium dihydrogenphosphate, KDP, or monobasic potassium phosphate) is the inorganic compound with the formula KH 2PO 4.