cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.17188/1742924
title: Materials Data on Na3Eu9B8O27 by Materials Project

description: Na3Eu9B8O27 crystallizes in the hexagonal P-62m space group. The structure is three-dimensional. Na1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Na–O bond distances ranging from 2.39–2.61 Å. There are two inequivalent Eu3+ sites. In the first Eu3+ site, Eu3+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Eu–O bond distances ranging from 2.38–2.67 Å. In the second Eu3+ site, Eu3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Eu–O bond distances ranging from 2.37–2.68 Å. There are three inequivalent B3+ sites. In the first B3+ site, B3+ is bonded in a trigonal planar geometry to three equivalent O2- atoms. All B–O bond lengths are 1.38 Å. In the second B3+ site, B3+ is bonded in a trigonal planar geometry to three equivalent O2- atoms. All B–O bond lengths are 1.39 Å. In the third B3+ site, B3+ is bonded in a trigonal planar geometry to three equivalent O2- atoms. All B–O bond lengths are 1.37 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Na1+, two equivalent Eu3+, and one B3+ atom. In the second O2- site, O2- is bonded to four Eu3+ atoms to form distorted corner-sharing OEu4 trigonal pyramids. In the third O2- site, O2- is bonded in a 1-coordinate geometry to one Na1+, three Eu3+, and one B3+ atom. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to three Eu3+ and one B3+ atom.
DOI: 10.17188/1742925
title: Materials Data on CsRb2GaI6 by Materials Project

description: (Rb)2CsGaI6 crystallizes in the cubic Fm-3m space group. The structure is three-dimensional and consists of eight rubidium molecules and one CsGaI6 framework. In the CsGaI6 framework, Cs1+ is bonded to six equivalent I1- atoms to form CsI6 octahedra that share corners with six equivalent GaI6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Cs–I bond lengths are 3.59 Å. Ga3+ is bonded to six equivalent I1- atoms to form GaI6 octahedra that share corners with six equivalent CsI6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Ga–I bond lengths are 2.81 Å. I1- is bonded in a linear geometry to one Cs1+ and one Ga3+ atom.
DOI: 10.17188/1742926
title: Materials Data on Li3Fe2(PO4)3 by Materials Project

description: Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations
DOI: 10.17188/1742927
title: Materials Data on Er4Co3 by Materials Project

description: Er4Co3 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are six inequivalent Er sites. In the first Er site, Er is bonded in a 7-coordinate geometry to seven Co atoms. There are a spread of Er–Co bond distances ranging from 2.84–3.02 Å. In the second Er site, Er is bonded in a 7-coordinate geometry to seven Co atoms. There are a spread of Er–Co bond distances ranging from 2.84–3.01 Å. In the third Er site, Er is bonded in a 7-coordinate geometry to seven Co atoms. There are a spread of Er–Co bond distances ranging from 2.84–3.01 Å. In the fourth Er site, Er is bonded in a 4-coordinate geometry to four Co atoms. There are a spread of Er–Co bond distances ranging from 2.78–3.07 Å. In the fifth Er site, Er is bonded in a 4-coordinate geometry to four Co atoms. There are a spread of Er–Co bond distances ranging from 2.77–3.07 Å. In the sixth Er site, Er is bonded in a 4-coordinate geometry to four Co atoms. There are a spread of Er–Co bond distances ranging from 2.77–3.07 Å. There are five inequivalent Co sites. In the first Co site, Co is bonded in a 9-coordinate geometry to six Er and three Co atoms. All Co–Co bond lengths are 2.34 Å. In the second Co site, Co is bonded in a 9-coordinate geometry to eight Er and one Co atom. In the third Co site, Co is bonded in a 9-coordinate geometry to eight Er and one Co atom. In the fourth Co site, Co is bonded in a 9-coordinate geometry to eight Er and one Co atom. In the fifth Co site, Co is bonded in a 6-coordinate geometry to six Er atoms.
DOI: 10.17188/1742929
title: Materials Data on Sc2Co3Si5 by Materials Project

description: Sc2Co3Si5 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. Sc3+ is bonded in a 10-coordinate geometry to ten Si+2.40- atoms. There are a spread of Sc–Si bond distances ranging from 2.79–3.10 Å. There are two inequivalent Co2+ sites. In the first Co2+ site, Co2+ is bonded in a 5-coordinate geometry to five Si+2.40- atoms. There are a spread of Co–Si bond distances ranging from 2.22–2.32 Å. In the second Co2+ site, Co2+ is bonded in a distorted hexagonal planar geometry to six Si+2.40- atoms. There are a spread of Co–Si bond distances ranging from 2.30–2.58 Å. There are four inequivalent Si+2.40- sites. In the first Si+2.40- site, Si+2.40- is bonded in a 9-coordinate geometry to four equivalent Sc3+, three Co2+, and two Si+2.40- atoms. There are one shorter (2.46 Å) and one longer (2.48 Å) Si–Si bond lengths. In the second Si+2.40- site, Si+2.40- is bonded in a 11-coordinate geometry to four equivalent Sc3+, three Co2+, and four Si+2.40- atoms. Both Si–Si bond lengths are 2.68 Å. In the third Si+2.40- site, Si+2.40- is bonded in a 6-coordinate geometry to four equivalent Sc3+ and four equivalent Co2+ atoms. In the fourth Si+2.40- site, Si+2.40- is bonded in a 11-coordinate geometry to four equivalent Sc3+, three Co2+, and four Si+2.40- atoms.
DOI: 10.17188/1742930
title: Materials Data on Ti2V3Cr(PO4)6 by Materials Project

description: Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations
DOI: 10.17188/1742931
title: Materials Data on RbZn2P3O14 by Materials Project

description: RbZn2P3O14 crystallizes in the orthorhombic P2_12_12_1 space group. The structure is three-dimensional. Rb is bonded in a 8-coordinate geometry to eight O atoms. There are a spread of Rb–O bond distances ranging from 2.94–3.51 Å. There are two inequivalent Zn sites. In the first Zn site, Zn is bonded in a trigonal planar geometry to three O atoms. There are a spread of Zn–O bond distances ranging from 1.86–1.91 Å. In the second Zn site, Zn is bonded to four O atoms to form ZnO4 tetrahedra that share corners with four PO4 tetrahedra. There are a spread of Zn–O bond distances ranging from 1.94–1.99 Å. There are three inequivalent P sites. In the first P site, P is bonded to four O atoms to form PO4 tetrahedra that share a cornercorner with one ZnO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.53–1.57 Å. In the second P site, P is bonded to four O atoms to form PO4 tetrahedra that share corners with two equivalent ZnO4 tetrahedra. There is two shorter (1.54 Å) and two longer (1.55 Å) P–O bond length. In the third P site, P is bonded to four O atoms to form PO4 tetrahedra that share a cornercorner with one ZnO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.53–1.56 Å. There are fourteen inequivalent O sites. In the first O site, O is bonded in a bent 150 degrees geometry to one Zn and one P atom. In the second O site, O is bonded in a distorted single-bond geometry to two equivalent Rb and one P atom. In the third O site, O is bonded in a 2-coordinate geometry to one Rb, one Zn, and one P atom. In the fourth O site, O is bonded in a distorted single-bond geometry to one Rb and one P atom. In the fifth O site, O is bonded in a single-bond geometry to one O atom. The O–O bond length is 1.23 Å. In the sixth O site, O is bonded in a single-bond geometry to one Rb and one P atom. In the seventh O site, O is bonded in a distorted single-bond geometry to one Rb and one O atom. In the eighth O site, O is bonded in a single-bond geometry to one Rb and one P atom. In the ninth O site, O is bonded in a single-bond geometry to one Rb and one P atom. In the tenth O site, O is bonded in a distorted bent 120 degrees geometry to one Zn and one P atom. In the eleventh O site, O is bonded in a bent 150 degrees geometry to one Zn and one P atom. In the twelfth O site, O is bonded in a distorted bent 120 degrees geometry to one Zn and one P atom. In the thirteenth O site, O is bonded in a bent 120 degrees geometry to one Zn and one P atom. In the fourteenth O site, O is bonded in a bent 150 degrees geometry to one Zn and one P atom.
DOI: 10.17188/1742932
title: Materials Data on Al2FeCu by Materials Project

description: FeCuAl2 crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two FeCuAl2 ribbons oriented in the (1, 0, 0) direction. Fe is bonded in a linear geometry to two equivalent Al atoms. Both Fe–Al bond lengths are 2.51 Å. Cu is bonded in a linear geometry to two equivalent Al atoms. Both Cu–Al bond lengths are 2.51 Å. Al is bonded in a linear geometry to one Fe and one Cu atom.
DOI: 10.17188/1742933
title: Materials Data on Li2MnPHO5 by Materials Project

description: Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations
DOI: 10.17188/1742934
title: Materials Data on NaS by Materials Project

description: NaS is Tetraauricupride structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Na1+ is bonded in a body-centered cubic geometry to eight equivalent S1- atoms. All Na–S bond lengths are 2.94 Å. S1- is bonded in a body-centered cubic geometry to eight equivalent Na1+ atoms.
DOI: 10.17188/1742935
title: Materials Data on Na2Te4WO12 by Materials Project

description: Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations
DOI: 10.17188/1742937
title: Materials Data on Li2CrO2 by Materials Project

description: Li2CrO2 is Spinel-like structured and crystallizes in the orthorhombic Immm space group. The structure is three-dimensional. Li1+ is bonded to four equivalent O2- atoms to form a mixture of distorted edge and corner-sharing LiO4 tetrahedra. There are two shorter (1.98 Å) and two longer (2.02 Å) Li–O bond lengths. Cr2+ is bonded in a square co-planar geometry to four equivalent O2- atoms. All Cr–O bond lengths are 2.06 Å. O2- is bonded to four equivalent Li1+ and two equivalent Cr2+ atoms to form a mixture of edge and corner-sharing OLi4Cr2 octahedra. The corner-sharing octahedra tilt angles range from 0–42°.
DOI: 10.17188/1742938
title: Materials Data on LiCrCO3F2 by Materials Project

description: Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations
DOI: 10.17188/1742939
title: Materials Data on Ba2In2Si3SO10 by Materials Project

description: Ba2In2Si3SO10 crystallizes in the orthorhombic Pca2_1 space group. The structure is three-dimensional. there are two inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to two equivalent S2- and eight O2- atoms. There are one shorter (3.33 Å) and one longer (3.44 Å) Ba–S bond lengths. There are a spread of Ba–O bond distances ranging from 2.75–3.18 Å. In the second Ba2+ site, Ba2+ is bonded in a 9-coordinate geometry to one S2- and eight O2- atoms. The Ba–S bond length is 3.28 Å. There are a spread of Ba–O bond distances ranging from 2.69–3.18 Å. There are two inequivalent In3+ sites. In the first In3+ site, In3+ is bonded to one S2- and five O2- atoms to form distorted InSO5 octahedra that share corners with five SiO4 tetrahedra. The In–S bond length is 2.55 Å. There are a spread of In–O bond distances ranging from 2.11–2.51 Å. In the second In3+ site, In3+ is bonded in a 5-coordinate geometry to one S2- and four O2- atoms. The In–S bond length is 2.46 Å. There are a spread of In–O bond distances ranging from 2.14–2.23 Å. There are three inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with three equivalent InSO5 octahedra and a cornercorner with one SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 39–60°. There are a spread of Si–O bond distances ranging from 1.63–1.67 Å. In the second Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with two equivalent InSO5 octahedra and corners with two SiO4 tetrahedra. The corner-sharing octahedra tilt angles range from 55–57°. There are a spread of Si–O bond distances ranging from 1.62–1.66 Å. In the third Si4+ site, Si4+ is bonded to four O2- atoms to form corner-sharing SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.61–1.69 Å. S2- is bonded in a 2-coordinate geometry to three Ba2+ and two In3+ atoms. There are ten inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to one Ba2+, one In3+, and one Si4+ atom. In the second O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Ba2+, one In3+, and one Si4+ atom. In the third O2- site, O2- is bonded in a 2-coordinate geometry to two Ba2+, one In3+, and one Si4+ atom. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to two Ba2+, one In3+, and one Si4+ atom. In the fifth O2- site, O2- is bonded in a distorted single-bond geometry to three Ba2+ and one Si4+ atom. In the sixth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two Ba2+ and two Si4+ atoms. In the seventh O2- site, O2- is bonded in a 3-coordinate geometry to one Ba2+, two In3+, and one Si4+ atom. In the eighth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Ba2+ and two Si4+ atoms. In the ninth O2- site, O2- is bonded in a 3-coordinate geometry to one Ba2+, one In3+, and one Si4+ atom. In the tenth O2- site, O2- is bonded in a 1-coordinate geometry to one Ba2+, two In3+, and one Si4+ atom.
DOI: 10.17188/1742940
title: Materials Data on ZrU3 by Materials Project

description: U3Zr is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are two inequivalent U sites. In the first U site, U is bonded to eight U and four equivalent Zr atoms to form UZr4U8 cuboctahedra that share corners with twelve equivalent UZr4U8 cuboctahedra, edges with eight equivalent ZrU12 cuboctahedra, edges with sixteen UZr4U8 cuboctahedra, faces with four equivalent ZrU12 cuboctahedra, and faces with fourteen UZr4U8 cuboctahedra. There are four shorter (2.98 Å) and four longer (3.22 Å) U–U bond lengths. All U–Zr bond lengths are 3.22 Å. In the second U site, U is bonded to eight equivalent U and four equivalent Zr atoms to form distorted UZr4U8 cuboctahedra that share corners with four equivalent UZr4U8 cuboctahedra, corners with eight equivalent ZrU12 cuboctahedra, edges with twenty-four UZr4U8 cuboctahedra, faces with six equivalent ZrU12 cuboctahedra, and faces with twelve UZr4U8 cuboctahedra. All U–Zr bond lengths are 2.98 Å. Zr is bonded to twelve U atoms to form ZrU12 cuboctahedra that share corners with four equivalent ZrU12 cuboctahedra, corners with eight equivalent UZr4U8 cuboctahedra, edges with eight equivalent ZrU12 cuboctahedra, edges with sixteen equivalent UZr4U8 cuboctahedra, faces with four equivalent ZrU12 cuboctahedra, and faces with fourteen UZr4U8 cuboctahedra.
DOI: 10.17188/1742941
title: Materials Data on Sr3P by Materials Project

description: Sr3P crystallizes in the hexagonal P6_3/mmc space group. The structure is one-dimensional and consists of two Sr3P ribbons oriented in the (0, 0, 1) direction. Sr is bonded in a distorted water-like geometry to two equivalent P atoms. Both Sr–P bond lengths are 3.40 Å. P is bonded in a 12-coordinate geometry to six equivalent Sr atoms.
DOI: 10.17188/1742943
title: Materials Data on Nd2Ge9 by Materials Project

description: Nd2Ge9 crystallizes in the orthorhombic Pmmn space group. The structure is three-dimensional. there are two inequivalent Nd sites. In the first Nd site, Nd is bonded in a 9-coordinate geometry to thirteen Ge atoms. There are a spread of Nd–Ge bond distances ranging from 3.04–3.50 Å. In the second Nd site, Nd is bonded in a 9-coordinate geometry to thirteen Ge atoms. There are a spread of Nd–Ge bond distances ranging from 3.06–3.38 Å. There are five inequivalent Ge sites. In the first Ge site, Ge is bonded in a 8-coordinate geometry to three Nd and five Ge atoms. There are a spread of Ge–Ge bond distances ranging from 2.57–3.02 Å. In the second Ge site, Ge is bonded in a 7-coordinate geometry to three Nd and four Ge atoms. There are one shorter (2.49 Å) and one longer (2.96 Å) Ge–Ge bond lengths. In the third Ge site, Ge is bonded in a 8-coordinate geometry to three equivalent Nd and five Ge atoms. There are two shorter (2.65 Å) and two longer (2.87 Å) Ge–Ge bond lengths. In the fourth Ge site, Ge is bonded in a 6-coordinate geometry to three equivalent Nd and three Ge atoms. Both Ge–Ge bond lengths are 2.56 Å. In the fifth Ge site, Ge is bonded in a 2-coordinate geometry to two Nd and eight Ge atoms.
DOI: 10.17188/1742944
title: Materials Data on Ti3N2 by Materials Project

description: Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations
DOI: 10.17188/1742945
title: Materials Data on SbH12C6(N3Cl2)3 by Materials Project

description: (C2N3H4)2C2N3H4ClSbCl5 crystallizes in the orthorhombic P2_12_12_1 space group. The structure is one-dimensional and consists of eight 2,3-dihydro-1h-1,2,4-triazole molecules; four C2N3H4Cl clusters; and two SbCl5 ribbons oriented in the (1, 0, 0) direction. In each C2N3H4Cl cluster, there are two inequivalent C4+ sites. In the first C4+ site, C4+ is bonded in a trigonal planar geometry to two N3- and one H1+ atom. There is one shorter (1.32 Å) and one longer (1.34 Å) C–N bond length. The C–H bond length is 1.09 Å. In the second C4+ site, C4+ is bonded in a trigonal planar geometry to two N3- and one H1+ atom. There is one shorter (1.32 Å) and one longer (1.37 Å) C–N bond length. The C–H bond length is 1.09 Å. There are three inequivalent N3- sites. In the first N3- site, N3- is bonded in a trigonal planar geometry to two C4+ and one H1+ atom. The N–H bond length is 1.03 Å. In the second N3- site, N3- is bonded in a distorted water-like geometry to one C4+ and one N3- atom. The N–N bond length is 1.36 Å. In the third N3- site, N3- is bonded in a 2-coordinate geometry to one C4+, one N3-, and one H1+ atom. The N–H bond length is 1.07 Å. There are four inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one C4+ atom. In the second H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the third H1+ site, H1+ is bonded in a distorted linear geometry to one N3- and one Cl1- atom. The H–Cl bond length is 1.96 Å. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one C4+ atom. Cl1- is bonded in a distorted single-bond geometry to one H1+ atom. In each SbCl5 ribbon, Sb3- is bonded to six Cl1- atoms to form corner-sharing SbCl6 octahedra. The corner-sharing octahedral tilt angles are 12°. There are a spread of Sb–Cl bond distances ranging from 2.47–2.97 Å. There are five inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a 2-coordinate geometry to one Sb3- atom. In the second Cl1- site, Cl1- is bonded in a single-bond geometry to one Sb3- atom. In the third Cl1- site, Cl1- is bonded in a linear geometry to two equivalent Sb3- atoms. In the fourth Cl1- site, Cl1- is bonded in a single-bond geometry to one Sb3- atom. In the fifth Cl1- site, Cl1- is bonded in a single-bond geometry to one Sb3- atom.
DOI: 10.17188/1742946
title: Materials Data on LiFePCO7 by Materials Project

description: Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations
DOI: 10.17188/1742947
title: Materials Data on Mn3(OF2)2 by Materials Project

description: Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations
DOI: 10.17188/1742948
title: Materials Data on Ta10Al6B by Materials Project

description: Ta10Al6B crystallizes in the trigonal P-31m space group. The structure is three-dimensional. there are three inequivalent Ta sites. In the first Ta site, Ta is bonded in a 8-coordinate geometry to two equivalent Ta and six equivalent Al atoms. Both Ta–Ta bond lengths are 2.65 Å. All Ta–Al bond lengths are 2.73 Å. In the second Ta site, Ta is bonded in a 8-coordinate geometry to two equivalent Ta and six equivalent Al atoms. All Ta–Al bond lengths are 2.74 Å. In the third Ta site, Ta is bonded in a distorted single-bond geometry to five equivalent Al and one B atom. There are a spread of Ta–Al bond distances ranging from 2.74–2.96 Å. The Ta–B bond length is 2.32 Å. Al is bonded in a 9-coordinate geometry to nine Ta atoms. B is bonded in an octahedral geometry to six equivalent Ta atoms.
DOI: 10.17188/1742949
title: Materials Data on CaF3 by Materials Project

description: CaF3 crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Ca is bonded to twelve equivalent F atoms to form a mixture of corner and face-sharing CaF12 cuboctahedra. There are six shorter (2.47 Å) and six longer (2.62 Å) Ca–F bond lengths. F is bonded in a see-saw-like geometry to four equivalent Ca atoms.
DOI: 10.17188/1742950
title: Materials Data on MnH44C12N8(ClO5)2 by Materials Project

description: Mn(H2O)6(C3N2H6)4(H2O)4Cl2 crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of two hydrochloric acid molecules, one manganese hexahydrate molecule, two methenamine molecules, and four water molecules.
DOI: 10.17188/1742951
title: Materials Data on Si2O by Materials Project

description: SiOSi is high (beta) Cristobalite structured and crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. Si is bonded in a linear geometry to two equivalent O atoms. Both Si–O bond lengths are 2.03 Å. O is bonded to four equivalent Si atoms to form corner-sharing OSi4 tetrahedra.
DOI: 10.17188/1742952
title: Materials Data on Mn2OF3 by Materials Project

description: Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations