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At least 1,135 records · Page 63
All sourcesNASA NTRSDOE OSTI
DOE OSTI2022

EGS Collab Experiment 3: 4100 Tensile Stimulation and Thermal Circulation Testing

These data and test descriptions are from a set of primarily tensile hydraulic-fracture stimulations in wells E2-TC and E2-TU and a subsequent chilled water circulation test conducted by injecting in well E2-TU on the 4100 level of the Sandford Underground Research Facility (SURF). Stimulations were carried out between April and May of 2022. The thermal circulation test ran semi-continuously from May 19 through August 26, 2022, though chilled water injection began on June 3. More information about the test, rationale, and processing of data is available on the EGS Collab project page, which is linked below.

15 GEOTHERMAL ENERGY↗
DOE OSTI2024

Soil properties and root characteristics across four lowland Panamanian forests from 0 - 1 m soil depths

Objectives:Fine roots significantly influence ecosystem-scale cycling of nutrients, carbon (C), and water, yet there is limited understanding of how fine root traits vary across and within tropical forests, some of Earth's most C-rich ecosystems. The biomass of fine roots can impact soil carbon storage, as root mortality is a primary source of new carbon to soils. A positive relationship has been observed between fine root biomass and soil carbon stocks in Panama (Cusack et al 2018). Beyond biomass, root characteristics like specific root length (SRL) could also influence soil carbon, as roots with higher SRL are less dense and thinner, potentially decomposing more easily or promoting soil aggregation. Understanding the effects of root morphology and tissue quality on soil carbon storage and with soil properties in general can improve predictions of landscape-scale carbon patterns. We aggregated new data of root biomass, morphology and nutrient content at 0-10 cm, 10-20 cm, 20-50 cm and 50-100 cm depth increments across four distinct lowland Panamanian forests and paired with already published datasets (Cusack et al 2018; Cusack and Turner 2020) of soil chemistry from the same sites and soil depths to explore relationship between soil carbon stocks and root characteristics.Datasets included:The datasets provided include .csv and .xlsx files for fine root characteristics and soil chemistry from four different forests across 0-10 cm, 10-20 cm, 20-50 cm, and 50-100 cm depth increments. Root characteristics include live fine root biomass, dead fine root biomass, coarse root biomass, specific root length, root diameter, root tissue density, specific root area, root %N, root %C, and root C/N ratio. Soil chemistry data includes total carbon (TC), dissolved organic carbon (DOC), bulk density, total phosphorus (TP), available phosphorus (AEM Pi), and various Mehlich-extractable elements such as aluminum, calcium, iron, potassium, manganese, phosphorus, and zinc. Nitrogen content measures include ammonium, nitrate, total dissolved nitrogen (TDN), dissolved inorganic nitrogen (DIN), and dissolved organic nitrogen (DON). The dataset also includes total exchangeable bases (TEB) and effective cation exchange capacity (ECEC) in both centimoles of charge per kilogram and micromoles of charge per gram. The soil chemistry data was obtained from Cusack et al (2018) and Cusack and Turner (2020) and paired with root characteristics data for the same depth increments and sites. Additionally, a .kml file is provided with coordinates for all 32 plots included in the study across four forests (n = 8 plots per site). Root data was averaged across these 8 plots per site and soil data was collected in one pit in each site. This dataset serves as baseline data before a throughfall exclusion experiment, Panama Rainforest Changes with Experimental Drying (PARCHED), was implemented. No special software is needed to open these files.

54 ENVIRONMENTAL SCIENCES↗
DOE OSTI2026

Soil physical and chemical measurements for topsoils collected during NEON campaign in East River, CO (06/14/2018-06/28/2018)

The package is part of the DOE Watershed Function Science Focus Area (SFA) project and includes soil physical and chemical measurements from topsoils collected at the East River, Colorado, in conjunction with the National Ecological Observatory Network (NEON) Airborne Observation Platform (AOP) survey conducted in June 2018. The soil measurements include soil bulk density, soil volumetric water content, soil microbial biomass C (Carbon), N (Nitrogen) and C:N (C to N ratio), soil DNA yield, soil total extractable organic C, soil total extractable N, soil extractable nitrate, soil extractable ammonium, soil dissolved inorganic N, soil dissolved organic N, soil pH, soil TOC400 (total organic carbon at 400°C), soil ROC (residual oxidizable carbon), soil TIC (total inorganic carbon), soil TOC (total organic carbon), soil TC (total carbon), soil N, soil OM (organic matter) loss on ignition. Additional associated site metadata can be found in the ESS-DIVE package 10.15485/1618130. The dataset includes (1) 2018_NEON_soil_physical_chemical_measurements.csv: soil physical and chemical measurements indexed by soil sample IGSNs; (2) samples.csv: sample metadata file used to register International Generic Sample Numbers (IGSNs); (3) flmd.csv: file level metadata file; and (4) dd.csv: data dictionary file. This work was supported by the Watershed Function Science Focus Area at Lawrence Berkeley National Laboratory funded by the US Department of Energy, Office of Science, Biological and Environmental Research under Contract No. DE-AC02-05CH11231.

2018 NEON and 2025 CHESS (Catchment Hydrology and ↗
DOE OSTI2020

Materials Data on TaTc by Materials Project

TcTa is Tetraauricupride structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Ta3+ is bonded in a body-centered cubic geometry to eight equivalent Tc3- atoms. All Ta–Tc bond lengths are 2.76 Å. Tc3- is bonded in a body-centered cubic geometry to eight equivalent Ta3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on TiTc by Materials Project

TiTc is Tetraauricupride structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Ti3+ is bonded in a body-centered cubic geometry to eight equivalent Tc3- atoms. All Ti–Tc bond lengths are 2.69 Å. Tc3- is bonded in a body-centered cubic geometry to eight equivalent Ti3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SrTcO3 by Materials Project

SrTcO3 is (Cubic) Perovskite structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Sr2+ is bonded to twelve equivalent O2- atoms to form SrO12 cuboctahedra that share corners with twelve equivalent SrO12 cuboctahedra, faces with six equivalent SrO12 cuboctahedra, and faces with eight equivalent TcO6 octahedra. All Sr–O bond lengths are 2.82 Å. Tc4+ is bonded to six equivalent O2- atoms to form TcO6 octahedra that share corners with six equivalent TcO6 octahedra and faces with eight equivalent SrO12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Tc–O bond lengths are 1.99 Å. O2- is bonded in a distorted linear geometry to four equivalent Sr2+ and two equivalent Tc4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on TcH4NO4 by Materials Project

TcO4NH4 is Silicon tetrafluoride-derived structured and crystallizes in the tetragonal I4_1/a space group. The structure is zero-dimensional and consists of four ammonium molecules and four TcO4 clusters. In each TcO4 cluster, Tc7+ is bonded in a tetrahedral geometry to four equivalent O2- atoms. All Tc–O bond lengths are 1.74 Å. O2- is bonded in a single-bond geometry to one Tc7+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on VTc by Materials Project

VTc is Tetraauricupride structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. V3+ is bonded in a body-centered cubic geometry to eight equivalent Tc3- atoms. All V–Tc bond lengths are 2.62 Å. Tc3- is bonded in a body-centered cubic geometry to eight equivalent V3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CsTcO4 by Materials Project

CsTcO4 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Cs1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Cs–O bond distances ranging from 3.20–3.36 Å. Tc7+ is bonded in a tetrahedral geometry to four O2- atoms. There is three shorter (1.74 Å) and one longer (1.75 Å) Tc–O bond length. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Cs1+ and one Tc7+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to three equivalent Cs1+ and one Tc7+ atom. In the third O2- site, O2- is bonded in a single-bond geometry to one Cs1+ and one Tc7+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Tc2O7 by Materials Project

Tc2O7 crystallizes in the orthorhombic Pbca space group. The structure is zero-dimensional and consists of four Tc2O7 clusters. Tc7+ is bonded to four O2- atoms to form corner-sharing TcO4 tetrahedra. There is three shorter (1.71 Å) and one longer (1.87 Å) Tc–O bond length. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to one Tc7+ atom. In the second O2- site, O2- is bonded in a linear geometry to two equivalent Tc7+ atoms. In the third O2- site, O2- is bonded in a single-bond geometry to one Tc7+ atom. In the fourth O2- site, O2- is bonded in a single-bond geometry to one Tc7+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K2TcCl6 by Materials Project

K2TcCl6 crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. K1+ is bonded to twelve equivalent Cl1- atoms to form KCl12 cuboctahedra that share corners with twelve equivalent KCl12 cuboctahedra, faces with six equivalent KCl12 cuboctahedra, and faces with four equivalent TcCl6 octahedra. All K–Cl bond lengths are 3.56 Å. Tc4+ is bonded to six equivalent Cl1- atoms to form TcCl6 octahedra that share faces with eight equivalent KCl12 cuboctahedra. All Tc–Cl bond lengths are 2.38 Å. Cl1- is bonded in a distorted single-bond geometry to four equivalent K1+ and one Tc4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on TcCl4 by Materials Project

TcCl4 crystallizes in the orthorhombic Pbca space group. The structure is one-dimensional and consists of four TcCl4 ribbons oriented in the (1, 0, 0) direction. Tc4+ is bonded to six Cl1- atoms to form edge-sharing TcCl6 octahedra. There are a spread of Tc–Cl bond distances ranging from 2.26–2.51 Å. There are four inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a single-bond geometry to one Tc4+ atom. In the second Cl1- site, Cl1- is bonded in a single-bond geometry to one Tc4+ atom. In the third Cl1- site, Cl1- is bonded in a water-like geometry to two equivalent Tc4+ atoms. In the fourth Cl1- site, Cl1- is bonded in a water-like geometry to two equivalent Tc4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on TcP4 by Materials Project

TcP4 is Hausmannite-like structured and crystallizes in the orthorhombic Pbca space group. The structure is three-dimensional. Tc4+ is bonded to six P1- atoms to form TcP6 octahedra that share corners with two equivalent TcP6 octahedra, corners with fourteen PTc2P2 tetrahedra, and an edgeedge with one TcP6 octahedra. The corner-sharing octahedral tilt angles are 56°. There are a spread of Tc–P bond distances ranging from 2.35–2.55 Å. There are four inequivalent P1- sites. In the first P1- site, P1- is bonded to two equivalent Tc4+ and two P1- atoms to form distorted PTc2P2 tetrahedra that share corners with three equivalent TcP6 octahedra, corners with eleven PTcP3 tetrahedra, and an edgeedge with one PTc2P2 tetrahedra. The corner-sharing octahedra tilt angles range from 64–73°. There are one shorter (2.20 Å) and one longer (2.23 Å) P–P bond lengths. In the second P1- site, P1- is bonded to two equivalent Tc4+ and two P1- atoms to form distorted PTc2P2 tetrahedra that share corners with three equivalent TcP6 octahedra and corners with thirteen PTc2P2 tetrahedra. The corner-sharing octahedra tilt angles range from 53–59°. The P–P bond length is 2.27 Å. In the third P1- site, P1- is bonded to one Tc4+ and three P1- atoms to form distorted PTcP3 tetrahedra that share corners with four equivalent TcP6 octahedra and corners with ten PTc2P2 tetrahedra. The corner-sharing octahedra tilt angles range from 56–76°. There are one shorter (2.19 Å) and one longer (2.21 Å) P–P bond lengths. In the fourth P1- site, P1- is bonded to one Tc4+ and three P1- atoms to form distorted PTcP3 tetrahedra that share corners with four equivalent TcP6 octahedra and corners with ten PTc2P2 tetrahedra. The corner-sharing octahedra tilt angles range from 48–72°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on TcP3 by Materials Project

TcP3 is Hausmannite-like structured and crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Tc1+ is bonded to six P+0.33- atoms to form TcP6 octahedra that share corners with four equivalent TcP6 octahedra, corners with six PTc3P tetrahedra, and edges with two equivalent TcP6 octahedra. The corner-sharing octahedral tilt angles are 54°. There are a spread of Tc–P bond distances ranging from 2.36–2.47 Å. There are three inequivalent P+0.33- sites. In the first P+0.33- site, P+0.33- is bonded in a distorted rectangular see-saw-like geometry to one Tc1+ and three P+0.33- atoms. There are two shorter (2.21 Å) and one longer (2.22 Å) P–P bond lengths. In the second P+0.33- site, P+0.33- is bonded to three equivalent Tc1+ and one P+0.33- atom to form PTc3P tetrahedra that share corners with two equivalent TcP6 octahedra, corners with ten PTc2P2 tetrahedra, and an edgeedge with one PTc2P2 tetrahedra. The corner-sharing octahedral tilt angles are 64°. The P–P bond length is 2.24 Å. In the third P+0.33- site, P+0.33- is bonded to two equivalent Tc1+ and two P+0.33- atoms to form distorted PTc2P2 tetrahedra that share corners with four equivalent TcP6 octahedra, corners with six PTc2P2 tetrahedra, and an edgeedge with one PTc3P tetrahedra. The corner-sharing octahedra tilt angles range from 50–74°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on TcO2 by Materials Project

TcO2 is beta Vanadium nitride-like structured and crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Tc4+ is bonded to six O2- atoms to form a mixture of corner and edge-sharing TcO6 octahedra. The corner-sharing octahedra tilt angles range from 40–50°. There are a spread of Tc–O bond distances ranging from 1.95–2.04 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to three equivalent Tc4+ atoms. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to three equivalent Tc4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Mn2TcO4 by Materials Project

TcMn2O4 is Spinel-like structured and crystallizes in the orthorhombic Imma space group. The structure is three-dimensional. Tc4+ is bonded to six O2- atoms to form TcO6 octahedra that share corners with six equivalent MnO4 tetrahedra, edges with two equivalent TcO6 octahedra, and edges with four equivalent MnO6 octahedra. There are two shorter (2.04 Å) and four longer (2.08 Å) Tc–O bond lengths. There are two inequivalent Mn2+ sites. In the first Mn2+ site, Mn2+ is bonded to four O2- atoms to form MnO4 tetrahedra that share corners with six equivalent TcO6 octahedra and corners with six equivalent MnO6 octahedra. The corner-sharing octahedra tilt angles range from 57–60°. There are two shorter (2.05 Å) and two longer (2.11 Å) Mn–O bond lengths. In the second Mn2+ site, Mn2+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with six equivalent MnO4 tetrahedra, edges with two equivalent MnO6 octahedra, and edges with four equivalent TcO6 octahedra. There are four shorter (2.15 Å) and two longer (2.28 Å) Mn–O bond lengths. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a rectangular see-saw-like geometry to two equivalent Tc4+ and two Mn2+ atoms. In the second O2- site, O2- is bonded in a rectangular see-saw-like geometry to one Tc4+ and three Mn2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Mg2TcO4 by Materials Project

Mg2TcO4 is Spinel-like structured and crystallizes in the orthorhombic Imma space group. The structure is three-dimensional. there are two inequivalent Mg2+ sites. In the first Mg2+ site, Mg2+ is bonded to four O2- atoms to form MgO4 tetrahedra that share corners with six equivalent MgO6 octahedra and corners with six equivalent TcO6 octahedra. The corner-sharing octahedra tilt angles range from 57–59°. There are two shorter (1.99 Å) and two longer (2.04 Å) Mg–O bond lengths. In the second Mg2+ site, Mg2+ is bonded to six O2- atoms to form MgO6 octahedra that share corners with six equivalent MgO4 tetrahedra, edges with two equivalent MgO6 octahedra, and edges with four equivalent TcO6 octahedra. There are four shorter (2.09 Å) and two longer (2.13 Å) Mg–O bond lengths. Tc4+ is bonded to six O2- atoms to form TcO6 octahedra that share corners with six equivalent MgO4 tetrahedra, edges with two equivalent TcO6 octahedra, and edges with four equivalent MgO6 octahedra. There are two shorter (2.03 Å) and four longer (2.07 Å) Tc–O bond lengths. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to two Mg2+ and two equivalent Tc4+ atoms to form a mixture of distorted edge and corner-sharing OMg2Tc2 trigonal pyramids. In the second O2- site, O2- is bonded to three Mg2+ and one Tc4+ atom to form a mixture of distorted edge and corner-sharing OMg3Tc trigonal pyramids.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Co2TcO4 by Materials Project

TcCo2O4 is Spinel-like structured and crystallizes in the orthorhombic Imma space group. The structure is three-dimensional. Tc4+ is bonded to six O2- atoms to form TcO6 octahedra that share corners with six equivalent CoO4 tetrahedra, edges with two equivalent TcO6 octahedra, and edges with four equivalent CoO6 octahedra. There are two shorter (2.02 Å) and four longer (2.07 Å) Tc–O bond lengths. There are two inequivalent Co2+ sites. In the first Co2+ site, Co2+ is bonded to four O2- atoms to form CoO4 tetrahedra that share corners with six equivalent TcO6 octahedra and corners with six equivalent CoO6 octahedra. The corner-sharing octahedra tilt angles range from 53–63°. There is two shorter (1.97 Å) and two longer (1.99 Å) Co–O bond length. In the second Co2+ site, Co2+ is bonded to six O2- atoms to form CoO6 octahedra that share corners with six equivalent CoO4 tetrahedra, edges with two equivalent CoO6 octahedra, and edges with four equivalent TcO6 octahedra. There are four shorter (2.06 Å) and two longer (2.22 Å) Co–O bond lengths. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a rectangular see-saw-like geometry to two equivalent Tc4+ and two Co2+ atoms. In the second O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Tc4+ and three Co2+ atoms.

36 MATERIALS SCIENCE↗