NDLI: Synthesis of neptunyl(VI) hydroxides and their$^{237}$Np Mössbauer spectra

Content Provider	Springer Nature Link
Author	Saito, T. Wang, J. Kitazawa, T. Takahashi, M. Takeda, M. Nakada, M. Nakamoto, T. Masaki, N. M. Yamashita, T. Saeki, M.
Copyright Year	1999
Abstract	Four types of neptunyl(VI) hydroxides have been synthesized by chemical oxidation of Np(IV) instead of ozone oxidation of Np(V) which caused the partial oxidation to the heptavalent state. NpO$_{2}$(OH)$_{2}$ (I) and NpO$_{2}$(OH)$_{2}$·H$_{2}$O (orthorhombic type) (II) have been obtained by adding pyridine to the solution at 373K and 343K, respectively. NpO$_{2}$(OH)$_{2}$·H$_{2}$O (hexagonal type) (III) and NpO$_{2}$(OH)$_{2}$·xH$_{2}$O·yNH$_{3}$ (x+y=1) (IV) have been prepared by using LiOH and NH$_{4}$OH, respectively. The four materials have been characterized by X-ray powder diffraction patterns, thermogravimetric analysis and$^{237}$Np Mössbauer spectra. The$^{237}$Np Mössbauer spectrum of (I) measured first time as anhydrous neptunyl(VI) hydroxide (δ=−46.2 mm/s,e $^{2}$ qQ=193 mm/s and η=0.16 at 4.8K) has more distinct five-line Mössbauer pattern than those of (II), (III) and (IV). The Mössbauer spectra for (II), (III) and (IV) are slightly different from each other. The structural information has been obtained from these data.
Starting Page	319
Ending Page	323
Page Count	5
File Format	PDF
ISSN	02365731
Journal	Journal of Radioanalytical and Nuclear Chemistry
Volume Number	239
Issue Number	2
e-ISSN	15882780
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	1999-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Inorganic Chemistry Physical Chemistry Diagnostic Radiology Nuclear Physics, Heavy Ions, Hadrons Nuclear Chemistry
Content Type	Text
Resource Type	Article
Subject	Spectroscopy Pollution Health, Toxicology and Mutagenesis Radiology, Nuclear Medicine and Imaging Analytical Chemistry Public Health, Environmental and Occupational Health Nuclear Energy and Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

A correlation between isomer shifts of$^{237}$Np Mössbauer spectra and coordination numbers of Np atoms in neptunyl(V) compounds

$^{237}$Np Mössbauer spectroscopic study on heptavalent neptunium compound

$^{237}$Np Mössbauer spectroscopic study on pentavalent neptunium glycolate complex

Preparation of source and sealed absorber holder for$^{237}$Np and$^{238}$U Mössbauer measurements

Revaluation of the correlation of isomer shift with Np-O bond length in various neptunyl(V and VI) compounds

Quantitative gamma-ray spectroscopy of $^{237–239}$Np

Determination of 237 Np in marine sediment and seawater

Determination of $^{237}$Np by k$_{0}$ RNAA

Migration mechanisms of $^{237}$Np and $^{241}$Am through loess media

Synthesis of neptunyl(VI) hydroxides and their$^{237}$Np Mössbauer spectra

Similar Documents

A correlation between isomer shifts of$^{237}$Np Mössbauer spectra and coordination numbers of Np atoms in neptunyl(V) compounds

$^{237}$Np Mössbauer spectroscopic study on heptavalent neptunium compound

$^{237}$Np Mössbauer spectroscopic study on pentavalent neptunium glycolate complex

Preparation of source and sealed absorber holder for$^{237}$Np and$^{238}$U Mössbauer measurements

Revaluation of the correlation of isomer shift with Np-O bond length in various neptunyl(V and VI) compounds

Quantitative gamma-ray spectroscopy of $^{237–239}$Np

Determination of 237 Np in marine sediment and seawater

Determination of $^{237}$Np by k$_{0}$ RNAA

Migration mechanisms of $^{237}$Np and $^{241}$Am through loess media

Synthesis of neptunyl(VI) hydroxides and their$^{237}$Np Mössbauer spectra