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Results for “NITRIC ACID”

Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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At least 181 records · Page 10
All sourcesNASA NTRSDOE OSTI
DOE OSTI2025

Direct Extraction of Uranium-Lanthanide Oxides in Tributyl Phosphate

Abstract Direct extraction of used nuclear fuel (UNF) in an organic solution could be more efficient than the previous practice with aqueous solutions. However, the UNF would need to be treated via voloxidiation before being processed using solvent extraction. The voloxidation process can form oxide and/or nitrate compounds. This work investigated the dissolution of uranium/lanthanide oxides in 30 vol % TBP diluted in dodecane (pre-equilibrated with 4 M nitric acid) in a glass reactor with air sparging to ascertain the uranium/lanthanide oxide dissolution behavior prior to scaling the process. The uranium/lanthanide oxides were prepared by co-precipitating uranium/lanthanide nitrates with hydroxide and then calcined to form a mixed oxide. While the relative concentrations of the lanthanides are not representative of used nuclear fuel, the neodymium and erbium allowed ease of tracking dissolution with visible spectroscopy. Cerium was used as a surrogate for plutonium. The dissolution rate of the oxides was similar but incomplete. A miniscule amount of cerium, as cerium oxide, took several months to slowly dissolve; however, when co-precipitated with uranium and other lanthanides, a significant amount of cerium dissolved readily.

12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE W↗
DOE OSTI2022

Ecophysiological and genomic analyses of a representative isolate of highly abundant Bacillus cereus strains in contaminated subsurface sediments

Abstract Bacillus cereus strain CPT56D‐587‐MTF (CPTF) was isolated from the highly contaminated Oak Ridge Reservation (ORR) subsurface. This site is contaminated with high levels of nitric acid and multiple heavy metals. Amplicon sequencing of the 16S rRNA genes (V4 region) in sediment from this area revealed an amplicon sequence variant (ASV) with 100% identity to the CPTF 16S rRNA sequence. Notably, this CPTF‐matching ASV had the highest relative abundance in this community survey, with a median relative abundance of 3.77% and comprised 20%–40% of reads in some samples. Pangenomic analysis revealed that strain CPTF has expanded genomic content compared to other B. cereus species—largely due to plasmid acquisition and expansion of transposable elements. This suggests that these features are important for rapid adaptation to native environmental stressors. We connected genotype to phenotype in the context of the unique geochemistry of the site. These analyses revealed that certain genes (e.g. nitrate reductase, heavy metal efflux pumps) that allow this strain to successfully occupy the geochemically heterogenous microniches of its native site are characteristic of the B. cereus species while others such as acid tolerance are mobile genetic element associated and are generally unique to strain CPTF.

59 BASIC BIOLOGICAL SCIENCES↗
DOE OSTI2021

Microstructural Evolution During a Solid State Tube Pinch Weld of Type 304l Stainless Steel

Microstructure development is examined for a specialized spot weld that is used as a solid-state closure process for austenitic stainless steel tubing, referred to as pinch welding. In order to elucidate the microstructural evolution of the weld, a series of test welds were made at nominal conditions using tubing and production like components. These pinch welds normally terminate after twelve cycles of a 60 Hz AC weld process. In this study, production tubes were welded from one to twelve cycles and the microstructure and weld variables after each individual weld cycle number were characterized using radiography and optical metallography. Two electrochemical etchants were used to highlight different microstructural features. The study revealed that: (1) this type pinch weld is largely complete after about six cycles of 60 Hz AC current, half the weld time utilized; (2) the resistance, deformation, and closure length approach “steady-state” conditions after six cycles; and (3) both oxalic and nitric acid electrolytic etchants are useful for highlighting specific microstructural attributes of type 304 L stainless steel. Finally, two distinct microstructural regions can be identified for these welds: the edge of the weld, which is driven by concentrated deformation, recrystallization, and grain growth, and the center region, which is more typical of forge welding and micro-asperity breakdown followed by diffusion and grain-growth.

36 MATERIALS SCIENCE↗
DOE OSTI2026

Cation Data for the East River Watershed, Colorado (2014-2025)

This data package contains mean values for cation concentration for water samples taken from the East River Watershed in Colorado. Inductively coupled plasma mass spectrometry (ICP-MS) has been used to measure the concentrations of elements of interest simultaneously for the East River Watershed, Colorado groundwater and surface water samples to inform insights on the biogeochemistry processes within the watershed. The East River is part of the Watershed Function Scientific Focus Area (WFSFA) located in the Upper Colorado River Basin, United States. For samples collected prior to 06-16-2021, the instrumentation, Elan DRC II, PerkinElmer SCIEX, automatically switches among the three models necessary to analyze all 37 elements. These 37 elements include: (1) Lithium (Li), Beryllium (Be), Boron (B), Sodium (Na), Magnesium (Mg), Aluminium (Al), Silicon (Si), Phosphorus (P), Titanium (Ti), Cobalt (Co), Nickel (Ni), Copper (Cu), Zinc (Zn), Germanium (Ge), Arsenic (As), Rubidium (Rb), Strontium (Sr), Zirconium (Zr), Molybdenum (Mo), Silver (Ag), Cadmium (Cd), Tin (Sn), Antimony (Sb), Caesium (Cs), Barium (Ba), Europium (Eu), Lead (Pb), Thorium (Th), Uranium (U) using standard model, argon Ar as reaction gas, (2) Potassium (K), Calcium (Ca), Vanadium (V), Chromium (Cr), Manganese (Mn), Iron (Fe) using dynamic reaction cell (DRC) model, ammonia NH3 as reaction gas, and (3) Phosphorus (P) and Selenium (Se) using DRC model, oxygen O2 as reaction gas. Note for the samples with higher concentrations of chloride (Cl-), asenic (As) concentrations were analysed with DRC model (oxygen O2 as reaction gas) to avoid the interference of chloride. For samples collected on and after 06-16-2021, an advanced Agilent 8900 triple quadrupole inductively coupled plasma mass spectrometry system (Agilent 8900 QQQ ICP-MS, Agilent Technologies) has been used to measure the concentrations of interested 36 elements simultaneously for environmental samples, including (1) Lithium (Li), Beryllium (Be) and Boron (B) using standard no gas mode, (2) Sodium (Na), Magnesium (Mg), Aluminium (Al) Phosphorus (P), Potassium (K), Chromium (Cr), Manganese (Mn), Iron (Fe), Cobalt (Co), Nickel (Ni), Copper (Cu), Zinc (Zn), Germanium (Ge), Arsenic (As), Rubidium (Rb), Strontium (Sr), Zirconium (Zr), Molybdenum (Mo), Silver (Ag), Cadmium (Cd), Tin (Sn), Antimony (Sb), Cesium (Cs), Barium (Ba), Europium (Eu), Lead (Pb), Thorium (Th) and Uranium (U) using standard helium (He) collision mode, (3) Titanium (Ti) and Vanadium (V) using high Energy (HEHe) helium (He) collision mode, and (4) Silicon (Si), Calcium (Ca) and Selenium (Se) using standard H2 reaction mode. All samples were prepared/diluted with 2% (v/v) ultrapure nitric acid in Milli-Q water (18.2 mega ohm-cm), and analyzed under a rigorous quality assurance and quality control (QA/QC) process. This data package contains (1) a zip file (cation_data_2014_2025.zip) containing a total of 5,849 files: 5.848 data files of cation data from across the Lawrence Berkeley National Laboratory (LBNL) Watershed Function Scientific Focus Area (SFA) which is reported in .csv files per location and a locations.csv (1 file) with latitude and longitude for each location; (2) a file-level metadata (v6_20260901_flmd.csv) file that lists each file contained in the dataset with associated metadata; (3) a data dictionary (v6_20260901_dd.csv) file that contains terms/column_headers used throughout the files along with a definition, units, and data type; (4) PDF and docx files for the detemination of Method Detection Limits (MDLs) for ICP-MS PerkinElmer DRC II instrumentation (Detemination_of_Method_Detection_Limits__MDLs__for_ICP_MS__PerkinElmer_Elan_DRC_II__LBL_Bldg74_Lab214D) for samples before November 2021; (5) PDF and docx files for the determination of MDLs for ICP-MS Agilent 8900 QQQ instrumentation (ICP_MS_Analysis_detection_limits_and_QA_QC_WenmingDong_updated_2026-08-06) for samples November 2021 and onward. Missing values within the anion data files are noted as either "-9999" or "0.0" for not detectable (N.D.) data. There are a total of 113 locations containing cation data. Update on 2021-04-11: Added Detemination of Method Detection Limits (MDLs) for ICP-MS document, which can be accessed as a PDF or with Microsoft Word. Update on 2022-06-10: versioned updates to this dataset was made along with these changes: (1) updated cation data for all locations up to 2021-12-31, (2) removal of units from column headers in datafiles, (3) added row underneath headers to contain units of variables, (4) removed suffix and prefix on two variables (“aqberylliumion_asberyllium” and “aqlithiumion_aslithium”), (5) added -9999 for empty numerical cells, and (6) the addition of the file-level metadata (flmd.csv) and data dictionary (dd.csv) were added to comply with the File-Level Metadata Reporting Format. Update on 2022-09-09: Updates were made to reporting format specific files (file-level metadata and data dictionary) to correct swapped file names, add additional details on metadata descriptions on both files, add a header_row column to enable parsing, and add version number and date to file names (v2_20220909_flmd.csv and v2_20220909_dd.csv). Update on 2023-08-08: Updates were made to both the data files and reporting format specific files. New available anion data was added, up until 2023-01-05. The file level metadata and data dictionary files were updated to reflect the additional data added. Update on 2024-03-11: Updates were made to both the data files and reporting format specific files. New available anion data was added, up until 2023-10-16. Further, revisions to the data files were made to remove incorrect data points (from 1970 and 2001). The reporting format specific files were updated to reflect the additional data added. Updated versions of the PDF and docx files for determination of MDLs for ICP-MS data were added to this dataset for samples starting in November 2021. Update on 2025-05-15: Updates were made to both the data files and reporting format specific files. New available cation data was added, up until the end of WY2024 (September 30, 2024). International Generic Sample Numbers (IGSNs), when registered, were added to the data files. The reporting format specific files were updated to reflect the additional data added. Update on 2026-09-01: Updates were made to both the data files and reporting format specific files. New available cation data was added, up until the end of WY2025 (September 30, 2025). Updated versions, as of 2026-08-06, of the PDF and docx files for determination of MDLs for ICP-MS data were added to this dataset for samples starting in November 2021.

54 ENVIRONMENTAL SCIENCES↗
DOE OSTI2020

Materials Data on UH12C4N4O11 by Materials Project

UNO5N(CH3)4(NO3)2 crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of eight nitric acid molecules, four tetramethylammonium molecules, and four UNO5 clusters. In each UNO5 cluster, U6+ is bonded in a distorted linear geometry to four O2- atoms. There are a spread of U–O bond distances ranging from 1.80–2.49 Å. N3- is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of N–O bond distances ranging from 1.22–1.30 Å. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to one U6+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to one U6+ and one N3- atom. In the third O2- site, O2- is bonded in a distorted L-shaped geometry to one U6+ and one N3- atom. In the fourth O2- site, O2- is bonded in a single-bond geometry to one U6+ atom. In the fifth O2- site, O2- is bonded in a single-bond geometry to one N3- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on H4N2O3 by Materials Project

NH4NO3 crystallizes in the orthorhombic Pmmn space group. The structure is zero-dimensional and consists of two ammonium molecules and two nitric acid molecules.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on H4N2O3 by Materials Project

NH4NO3 is beta-prime cadmium gold-like structured and crystallizes in the orthorhombic Pccn space group. The structure is zero-dimensional and consists of eight ammonium molecules and eight nitric acid molecules.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on N2O5 by Materials Project

N2O5 crystallizes in the hexagonal P6_3/mmc space group. The structure is zero-dimensional and consists of two hydroxylamine, n-hydroxy- molecules and two nitric acid molecules.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on S4N4O3 by Materials Project

N3S4NO3 crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four nitric acid molecules and four N3S4 clusters. In each N3S4 cluster, there are three inequivalent N+3.50+ sites. In the first N+3.50+ site, N+3.50+ is bonded in a bent 150 degrees geometry to two S2- atoms. There is one shorter (1.55 Å) and one longer (1.57 Å) N–S bond length. In the second N+3.50+ site, N+3.50+ is bonded in a distorted bent 150 degrees geometry to two S2- atoms. There is one shorter (1.58 Å) and one longer (1.59 Å) N–S bond length. In the third N+3.50+ site, N+3.50+ is bonded in a bent 150 degrees geometry to two S2- atoms. There is one shorter (1.55 Å) and one longer (1.57 Å) N–S bond length. There are four inequivalent S2- sites. In the first S2- site, S2- is bonded in a 1-coordinate geometry to one N+3.50+ atom. In the second S2- site, S2- is bonded in a bent 120 degrees geometry to two N+3.50+ atoms. In the third S2- site, S2- is bonded in a bent 120 degrees geometry to two N+3.50+ atoms. In the fourth S2- site, S2- is bonded in a distorted single-bond geometry to one N+3.50+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on H6CN2O3 by Materials Project

CH6N2O3 is beta-prime cadmium gold structured and crystallizes in the orthorhombic Pnma space group. The structure is zero-dimensional and consists of four methylammonium molecules and four nitric acid molecules.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on H5(NO)3 by Materials Project

N2H5NO3 crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four ammonia molecules, four ammonia molecules, and four nitric acid molecules.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on H7C(NO)3 by Materials Project

CH3NH2NH2NO3 crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four ammonia molecules, four methylamine molecules, and four nitric acid molecules.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on IN2O4F5 by Materials Project

NONO3IF5 crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of two nitric acid molecules, two nitroxyl molecules, and two IF5 clusters. In each IF5 cluster, I5+ is bonded in a square pyramidal geometry to five F1- atoms. There are a spread of I–F bond distances ranging from 1.86–1.95 Å. There are five inequivalent F1- sites. In the first F1- site, F1- is bonded in a single-bond geometry to one I5+ atom. In the second F1- site, F1- is bonded in a single-bond geometry to one I5+ atom. In the third F1- site, F1- is bonded in a single-bond geometry to one I5+ atom. In the fourth F1- site, F1- is bonded in a single-bond geometry to one I5+ atom. In the fifth F1- site, F1- is bonded in a single-bond geometry to one I5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Mn4Bi3NO15 by Materials Project

Bi3Mn4O12(NO3) is beta Vanadium nitride-derived structured and crystallizes in the trigonal P3 space group. The structure is two-dimensional and consists of one nitric acid molecule and one Mn4(BiO4)3 sheet oriented in the (0, 0, 1) direction. In the Mn4(BiO4)3 sheet, there are four inequivalent Mn6+ sites. In the first Mn6+ site, Mn6+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with three equivalent BiO6 octahedra and edges with three equivalent MnO6 octahedra. The corner-sharing octahedral tilt angles are 53°. There is three shorter (1.90 Å) and three longer (1.96 Å) Mn–O bond length. In the second Mn6+ site, Mn6+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with three equivalent BiO6 octahedra and edges with three equivalent MnO6 octahedra. The corner-sharing octahedral tilt angles are 54°. There is three shorter (1.89 Å) and three longer (1.96 Å) Mn–O bond length. In the third Mn6+ site, Mn6+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with three equivalent BiO6 octahedra and edges with three equivalent MnO6 octahedra. The corner-sharing octahedral tilt angles are 54°. There is three shorter (1.90 Å) and three longer (1.96 Å) Mn–O bond length. In the fourth Mn6+ site, Mn6+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with three equivalent BiO6 octahedra and edges with three equivalent MnO6 octahedra. The corner-sharing octahedral tilt angles are 54°. There is three shorter (1.90 Å) and three longer (1.96 Å) Mn–O bond length. There are three inequivalent Bi3+ sites. In the first Bi3+ site, Bi3+ is bonded to six O2- atoms to form BiO6 octahedra that share corners with twelve MnO6 octahedra. The corner-sharing octahedra tilt angles range from 53–54°. There are three shorter (2.37 Å) and three longer (2.38 Å) Bi–O bond lengths. In the second Bi3+ site, Bi3+ is bonded in a distorted T-shaped geometry to three equivalent O2- atoms. All Bi–O bond lengths are 2.16 Å. In the third Bi3+ site, Bi3+ is bonded in a 3-coordinate geometry to three equivalent O2- atoms. All Bi–O bond lengths are 2.16 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to two Mn6+ and one Bi3+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to two Mn6+ and one Bi3+ atom. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to two Mn6+ and one Bi3+ atom. In the fourth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Mn6+ and one Bi3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Hg2NO4 by Materials Project

HgHgONO3 crystallizes in the monoclinic P2_1/c space group. The structure is two-dimensional and consists of four nitric acid molecules and one HgHgO sheet oriented in the (1, 0, 0) direction. In the HgHgO sheet, there are two inequivalent Hg+1.50+ sites. In the first Hg+1.50+ site, Hg+1.50+ is bonded in a 2-coordinate geometry to two equivalent O2- atoms. Both Hg–O bond lengths are 2.11 Å. In the second Hg+1.50+ site, Hg+1.50+ is bonded in a 1-coordinate geometry to two equivalent O2- atoms. There are one shorter (2.20 Å) and one longer (3.02 Å) Hg–O bond lengths. O2- is bonded to four Hg+1.50+ atoms to form a mixture of distorted edge and corner-sharing OHg4 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on H9C2(NO)3 by Materials Project

C2NH7NH2NO3 crystallizes in the orthorhombic Pna2_1 space group. The structure is zero-dimensional and consists of four ammonia molecules, four dimethylamine molecules, and four nitric acid molecules.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NdNO4 by Materials Project

NdONO3 crystallizes in the orthorhombic Pnma space group. The structure is one-dimensional and consists of four nitric acid molecules and two NdO ribbons oriented in the (0, 1, 0) direction. In each NdO ribbon, Nd3+ is bonded in a 2-coordinate geometry to two equivalent O2- atoms. There are one shorter (2.13 Å) and one longer (2.16 Å) Nd–O bond lengths. O2- is bonded in a bent 150 degrees geometry to two equivalent Nd3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on H6N4O9 by Materials Project

NH2NH2O3(HNO3)2 crystallizes in the monoclinic P2_1 space group. The structure is zero-dimensional and consists of two ammonia molecules, two ncimech_000224 molecules, and four nitric acid molecules.

36 MATERIALS SCIENCE↗