13774-16-8

Usage

Uses

Used in Electronic Devices:
Rubidium Dihydrogen Phosphate is used as a piezoelectric material for its ability to generate an electric charge in response to applied mechanical stress. This property is particularly useful in electronic devices that require precise control of electrical signals.
Used in Laboratories:
Rubidium Dihydrogen Phosphate is used as a research material in optics and nonlinear optics studies. Its electro-optic properties allow scientists to investigate the interaction of light with matter and develop new optical technologies.
Used in Industrial Applications:
RUBIDIUM DIHYDROGEN PHOSPHATE is employed in various industrial processes due to its unique properties. Its thermal stability and reactivity with water make it suitable for applications that require specific temperature control or chemical reactions.
It is important to handle Rubidium Dihydrogen Phosphate with care, as it can react with water to form harmful phosphoric acid. Proper safety measures should be taken to minimize potential risks during its use in different applications.

Upstream product

• 86119-84-8 phosphoric acid 
• 132486-03-4 rubidium chloride 
• 5970-45-6 zinc(II) acetate dihydrate 

Relevant academic research and scientific papers

High-Temperature Phase Transition in RbH2PO4

Dielectric and thermal measurements were carried out for the RbH2PO4 crystal belonging to the tetragonal system at room temperature. The RbH2PO4 crystal, which could be obtained by heating the tetragonal RbH2PO4 crystal above the tetragonal-monoclinic transformation temperature, undergoes successive phase transitions at 390.1 K and 248.8 K. The tetragonal-monoclinic transformation is accompanied by a rearrangement of hydrogen bonds, namely, a change from a three-dimensional network of hydrogen bonds in tetragonal RbH2PO4 to a two-dimensional network in monoclinic one. The tetragonal space group I42d changes to the monoclinic P21/c by passing through the transformation temperature.

Impedance analysis and protonic conduction mechanism in RbH 2PO4/SiO2 composite systems

The protonic conductivity of (1 - x)RbH2PO4-xSiO 2 composites prepared by mechanical milling has been investigated in the humid atmosphere. In comparison with pure RbH2PO4, the conductivity enhancemen

Neutron diffraction study of ferrielectric phase transition in monoclinic RbD2PO4

Crystal structures of monoclinic RbD2PO4 were studied at 297K in the ferrielectric phase (phase III) and at 350 K in the paraelectric phase (phase II) by means of the single crystal neutron diffraction. The oxygen and deuterium atoms associated with the hydrogen bonds along the b axis are ordered in phase III and are disordered in phase II. Other atoms are ordered in both phases II and III. There are four kinds of PO4 tetrahedra in phase III. The ferrielectricity of phase III were confirmed in the present neutron structural analysis. The III-II phase transition is caused by an order-disorder of PO 4 tetrahedra accompanied by the motion of deuterium atoms within the hydrogen-bond chain. Fluctuations of the oxygen and deuterium atoms related hydrogen-bond chains along the b axis give rise to a quasi-one-dimensionality. 2007 The Physical Society of Japan.

High-temperature dehydration behavior and protonic conductivity of RbH 2PO4 in humid atmosphere

The high-temperature (HT) properties of RbH2PO4 have been investigated here by several methods. Two anomalies at Tp (～109 °C) and T′p (～276 °C) in differential scanning calorimetry (DSC) measurement are due to structural transition from tetragonal (phase III) to monoclinic (phase II) and monoclinic to an unidentified phase I, respectively. The initial dehydration event in RbH2PO4 occurs at ～250 °C, leading to the formation of dimer crust (Rb 2H2P2O7) on the external surface of crystal particles which decelerates the further dehydration process. The conductivity measurement was performed under a highly humidified N2 condition PH2O0.56atm to suppress its dehydration. It revealed two reversible superprotonic phase transition at Tp and T′p. For the one at T′p, the conductivity increases sharply by ～2 orders of magnitude and the high-conductivity phase I was stable till melting. However, the other one at Tp shows a relatively small jump in conductivity.

Structure of Cs1 - X Rb x H2PO4 solid solutions

Cs1 - x Rb x H2PO4 solid solutions have been synthesized for the first time in a broad composition range, x = 0.03-0.9. At room temperature, the Cs1 - x Rb x H2PO4 solid solutions are isostructural with the low-temperature phase of CsH2PO4 over the entire composition range studied. In the CsH2PO4-based solid-solution series, the unit-cell parameters and volume decrease with increasing Rb content. At high temperatures, the Cs1 - x Rb x H2PO4 solid solutions exist in the range x = 0-0.4, are isostructural with cubic CsH2PO4, and have a smaller unit-cell parameter.

New rubidium zinc hydrogen phosphate, Rb2Zn2(HPO4)3: Synthesis, crystal structure, and 31P single-crystal NMR

A new rubidium zinc hydrogen phosphate, Rb2Zn2(HPO4)3, is prepared by an unusual method utilizing long nucleation times. This material is crystallized from a gel with an initial composition of 1.0 ZnO/0.94 P2O5/0.96 Rb2O/0.04 Li2O/41 H2O, while the phosphate concentration equals 1.6 M and pH = 3.5. The gel is placed in a sealed Pyrex flask at 52 °C, and after 4.5 months crystallization of Rb2Zn2(HPO4)3 is noticed. This new crystalline compound has a three-dimensional framework structure built from spiral chains of alternating PO4 and ZnO4 tetrahedra connected pairwise and assembled by other PO4 tetrahedra, rubidium ions, and hydrogen bonds. The two rubidium ions, Rb(1) and Rb(2), have an exceptionally low number of oxygen contacts in the first coordination sphere, five and seven, respectively. Crystal data: Monoclinic, P21/c (no. 14), a = 12.5880(4), b = 12.7170(8), c = 7.5827(8) A, β = 96.100(1)°, Z = 4. A single-crystal 31P NMR investigation of Rb2Zn2(HPO4)3 was performed employing a two-axis goniometer probe and reveals the presence of three chemically and six magnetically nonequivalent phosphorus sites, in accordance with the crystal structure. 31P chemical shielding anisotropies and isotropic chemical shifts (-3.3(3), -2.6(3), and 2.0(3) ppm) have been determined for the three phosphorus sites.

Synthesis and structure determination of Rb2(HSO4)(H2PO4) and Rb4(HSO4)3(H2PO4) by x-ray single crystal and neutron powder diffraction

Two new compounds, Rb2(HSO4)(H2PO4) and Rb4(HSO4)3 (H2PO4), were synthesized from aqueous solutions of RbHSO4/RbH2PO4. The compounds were characterized by X-ray single crystal analysis and neutron powder diffraction. For Rb2(HSO4)(H2PO4), room temperature and a low temperature modification were found. According to X-ray crystal structure analysis, the compounds have the following crystal data: Rb2(HSO4)(H2PO4) (T = 298 K), monoclinic, space group P21/n, a = 7.448(3) A, b = 7.552(2) A, c = 7.632(3) A, β = 100.47(3)°, V = 422.1(3) A3, Z = 2, R1 = 0.033; Rb2(HSO4)(H2PO4) (T = 160K), monoclinic, space group P21/c, a = 11.555(3) A, b = 7.536(2) A, c = 9.593(2) A, β = 91.56(2)°, V = 853.0(4) A3, Z = 4, R1 = 0.041; Rb4(HSO4)3(H2PO4), orthorhombic, space group P21212, a = 7.612(6) A, b = 14.795(9) A, c = 7.446(4) A, V = 838.6(9) A3, Z = 2, R1 = 0.045. The compounds have different coordination numbers of rubidium, being 7, 8, 9, or 10 with Rb-O distances from 2.9 to 3.3 A. In all cases there were difficulties in the allocation of sulfur and phosphorus due to the small differences in their radii and scattering factors. All structures are characterized by HSO4- and H2PO4-, or disordered H(x)S/PO4- tetrahedra connected to zigzag chains via hydrogen bridges. These chains are linked by additional hydrogen bonds to a layer-like hydrogen bonding system. (C) 2000 Academic Press.

A humidity-controlled precipitation technique enabling discovery of Rb3(H1.5PO4)2

The previously unknown compound Rb3(H1.5PO4)2 is successfully synthesized here using a newly developed variant of aqueous precipitation crystal growth. The approach exploits the phenomenon of boiling point elevation in concentrated solutions. Crystals of the title compound were obtained upon heating a stoichiometric solution from 110 to 150 ?°C under a high steam partial pressure of 0.83 ?atm. Single crystal X-ray diffraction studies revealed Rb3(H1.5PO4)2 crystallizes in space group C2/m and is isostructural to Cs3(H1.5PO4)2. As evidenced by thermal analysis, Rb3(H1.5PO4)2 does not undergo a phase transition to a trigonal superprotonic phase upon heating. Even under a steam partial pressure of 0.82 ?atm, under which dehydration is suppressed to a temperature of 263 ?°C, no polymorphic transition is detected. The behavior parallels that of Cs3(H1.5PO4)2 and contrasts that of several structurally and chemically similar selenate compounds. The crystal growth approach developed here may prove particularly useful for obtaining water soluble compounds which are thermodynamically or kinetically disfavored at temperatures close to ambient.

Phase transition of RbH2PO4 and its composite withSiO2 studied by thermal analysis

The phase transition at Tp (～109 °C) of RbH 2 PO 4 and its composite with SiO 2 has been investigated by thermal analysis here. In the case of neat RbH 2 PO 4 ,there is a linear relationship between endothermic peak temperature (Tm ) and square root of heating rate (φ 1/2 ), fromwhich the onset temperature of phase transition can be determined. Besi des, Kissinger method and another calculation method were employed to obtain the activation energy of phase transition. The detailed deduction process was presented in this paper, and the estimated activation energies are E 1 and 126.3 kJ/mol and E 2 and 129.2 kJ/mol,respectively. On the other hand, the heterogeneous doping of RbH 2PO 4 with SiO 2 as dopant facilitates its protonconduction and leads to the disappearance of jump in conductivity at Tp . The heats of transition in the composites decrease gradually with increasing the molar fraction of SiO 2 additives. In the cooling process, a new and broad exothermic peak appeared between ～95 and ～110 °C, and its intensity also changes with the SiO 2 amount. These phenomena might be related to the formation of amorphous phase of RbH 2 PO 4 on the surface of SiO 2 particles due to the strong interface interaction.

High-temperature thermal behaviors of XH2PO4 (X = Cs, Rb, K, Na) and LiH2PO3

XH2PO4 ionic compounds have emerged as a viable electrolyte for intermediate temperature fuel cells, and here have been subjected to thermal analysis to clarify their high-temperature properties. Thermoanalytical peaks were identified at 231.5, 239 and 349 °C for CsH2PO4; 127, 250 and 354 °C for RbH2PO4; 232, 270 and 319 °C for KH2PO4; 223, 330 and 352 °C for NaH2PO4; also, 195 and 220 °C for LiH2PO3 (peak temperature values as measured at the same heating rate of 10 K/min). The thermal events at 231.5 °C in CsH2PO4 and 127 °C in RbH2PO4 were previously interpreted as thermal decomposition by numerous researchers, but we confirm their origin in structural phase transition. The high-temperature variations in KH2PO4 and NaH2PO4 are entirely due to thermal dehydration rather than phase transition. We have also examined LiH2PO3, and found, for the first time, an endothermic peak at 195 °C, and attributed it to structural phase transition.