cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.17188/1268370
title: Materials Data on Sb2H30C9(NCl3)3 by Materials Project

description: ((CH3)3NH)3Sb2Cl9 is Silicon tetrafluoride-derived structured and crystallizes in the monoclinic Pc space group. The structure is two-dimensional and consists of six trimethylazanium molecules and one Sb2Cl9 sheet oriented in the (1, 0, 0) direction. In the Sb2Cl9 sheet, there are two inequivalent Sb sites. In the first Sb site, Sb is bonded to six Cl1- atoms to form distorted corner-sharing SbCl6 octahedra. The corner-sharing octahedra tilt angles range from 17–23°. There are a spread of Sb–Cl bond distances ranging from 2.43–3.28 Å. In the second Sb site, Sb is bonded to six Cl1- atoms to form distorted corner-sharing SbCl6 octahedra. The corner-sharing octahedra tilt angles range from 17–23°. There are a spread of Sb–Cl bond distances ranging from 2.44–3.43 Å. There are nine inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a 2-coordinate geometry to two Sb atoms. In the second Cl1- site, Cl1- is bonded in a 1-coordinate geometry to two Sb atoms. In the third Cl1- site, Cl1- is bonded in a single-bond geometry to one Sb atom. In the fourth Cl1- site, Cl1- is bonded in a single-bond geometry to one Sb atom. In the fifth Cl1- site, Cl1- is bonded in a single-bond geometry to one Sb atom. In the sixth Cl1- site, Cl1- is bonded in a single-bond geometry to one Sb atom. In the seventh Cl1- site, Cl1- is bonded in a single-bond geometry to one Sb atom. In the eighth Cl1- site, Cl1- is bonded in a single-bond geometry to one Sb atom. In the ninth Cl1- site, Cl1- is bonded in a distorted linear geometry to two Sb atoms.
DOI: 10.15468/p86rpn
title: Three new species of Aricidea (Acmira) (Annelida: Paraonidae) from the Continental Shelf of Eastern Brazil, Southwestern Atlantic

description: This dataset contains the digitized treatments in Plazi based on the original journal article Barroso, R., Paiva, P. C., Ranauro, N. (2020): Three new species of Aricidea (Acmira) (Annelida: Paraonidae) from the Continental Shelf of Eastern Brazil, Southwestern Atlantic. Zootaxa 4838 (3): 415-426, DOI: https://doi.org/10.11646/zootaxa.4838.3.6
DOI: 10.17188/1268371
title: Materials Data on Mn2Hg2SF6 (SG:227) 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: 10.17188/1268372
title: Materials Data on H11C10NO8 by Materials Project

description: (CH3)2NH2(CO)2(H(CO)2)3 crystallizes in the orthorhombic Pccn space group. The structure is zero-dimensional and consists of four dimethylazanium molecules, eight formaldehyde molecules, and twelve methanol with formaldehyde molecules.
DOI: 10.17188/1268373
title: Materials Data on NiH44C12N8(ClO5)2 by Materials Project

description: Ni(H2O)2(CH2)2(CNHCH3)2(H2)2(C3N3H6OCl)2(H2O)6 crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of two dimethylamine molecules, four hydrogen molecules, six hydrogen hydrate molecules, two methane molecules, two C3N3H6OCl clusters, and one Ni(H2O)2 cluster. In each C3N3H6OCl cluster, there are three inequivalent C sites. In the first C site, C is bonded in a 3-coordinate geometry to two N3- and one H1+ atom. There is one shorter (1.14 Å) and one longer (1.51 Å) C–N bond length. The C–H bond length is 1.28 Å. In the second C site, C is bonded in a 2-coordinate geometry to one N3- and two H1+ atoms. The C–N bond length is 1.50 Å. There is one shorter (0.84 Å) and one longer (1.70 Å) C–H bond length. In the third C site, C is bonded in a distorted bent 120 degrees geometry to one N3- and one H1+ atom. The C–N bond length is 1.11 Å. The C–H bond length is 1.12 Å. There are three inequivalent N3- sites. In the first N3- site, N3- is bonded in a 1-coordinate geometry to one C and two H1+ atoms. There is one shorter (1.38 Å) and one longer (1.61 Å) N–H bond length. In the second N3- site, N3- is bonded in a 2-coordinate geometry to one C and one H1+ atom. The N–H bond length is 1.32 Å. In the third N3- site, N3- is bonded in a distorted bent 120 degrees geometry to two C atoms. There are six inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a distorted single-bond geometry to one C, one N3-, and one Cl1- atom. The H–Cl bond length is 1.95 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.33 Å. In the third H1+ site, H1+ is bonded in a distorted single-bond geometry to one N3- and one O2- atom. The H–O bond length is 0.79 Å. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one C atom. In the fifth H1+ site, H1+ is bonded in a distorted single-bond geometry to one C atom. In the sixth H1+ site, H1+ is bonded in a 1-coordinate geometry to one C and one N3- atom. O2- is bonded in a distorted bent 120 degrees geometry to two H1+ atoms. Cl1- is bonded in a single-bond geometry to one H1+ atom. In the Ni(H2O)2 cluster, Ni2+ is bonded in a distorted linear geometry to two equivalent O2- atoms. Both Ni–O bond lengths are 2.03 Å. There are two inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.67 Å. In the second H1+ site, H1+ is bonded in a distorted single-bond geometry to one O2- atom. The H–O bond length is 1.04 Å. O2- is bonded in a distorted single-bond geometry to one Ni2+ and two H1+ atoms.
DOI: 10.17188/1268374
title: Materials Data on RbSmO2 by Materials Project

description: RbSmO2 is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Rb1+ is bonded in a 6-coordinate geometry to six equivalent O2- atoms. All Rb–O bond lengths are 2.97 Å. Sm3+ is bonded to six equivalent O2- atoms to form edge-sharing SmO6 octahedra. All Sm–O bond lengths are 2.40 Å. O2- is bonded to three equivalent Rb1+ and three equivalent Sm3+ atoms to form a mixture of distorted edge and corner-sharing ORb3Sm3 octahedra. The corner-sharing octahedral tilt angles are 0°.
DOI: 10.17188/1268375
title: Materials Data on GdH8C10N(O2F3)4 by Materials Project

description: Gd(CO2)4(CH3)2NH2(CF3)4 crystallizes in the triclinic P-1 space group. The structure is one-dimensional and consists of two dimethylazanium molecules; eight fluoroform molecules; and one Gd(CO2)4 ribbon oriented in the (1, 0, 0) direction. In the Gd(CO2)4 ribbon, Gd3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Gd–O bond distances ranging from 2.38–2.52 Å. There are four inequivalent C2+ sites. In the first C2+ site, C2+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.25 Å) and one longer (1.27 Å) C–O bond length. In the second C2+ site, C2+ is bonded in a bent 120 degrees geometry to two O2- atoms. Both C–O bond lengths are 1.26 Å. In the third C2+ site, C2+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.25 Å) and one longer (1.27 Å) C–O bond length. In the fourth C2+ site, C2+ is bonded in a bent 120 degrees geometry to two O2- atoms. Both C–O bond lengths are 1.26 Å. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted linear geometry to one Gd3+ and one C2+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to one Gd3+ and one C2+ atom. In the third O2- site, O2- is bonded in a distorted single-bond geometry to one Gd3+ and one C2+ atom. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to one Gd3+ and one C2+ atom. In the fifth O2- site, O2- is bonded in a distorted single-bond geometry to one Gd3+ and one C2+ atom. In the sixth O2- site, O2- is bonded in a distorted single-bond geometry to one Gd3+ and one C2+ atom. In the seventh O2- site, O2- is bonded in a distorted single-bond geometry to one Gd3+ and one C2+ atom. In the eighth O2- site, O2- is bonded in a distorted single-bond geometry to one Gd3+ and one C2+ atom.
DOI: 10.17188/1268376
title: Materials Data on V3H8C2NO7 (SG:4) 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: 10.17188/1268377
title: Materials Data on H14C5(SN)2 by Materials Project

description: (CH3)2NH2C3NH6S2 crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four dimethylazanium molecules and four dimethyldithiocarbamic acid molecules.
DOI: 10.17188/1268378
title: Materials Data on CdH8C2Br3N by Materials Project

description: CdBr3(CH3)2NH2 crystallizes in the monoclinic P2_1/c space group. The structure is one-dimensional and consists of four dimethylazanium molecules and two CdBr3 ribbons oriented in the (1, 0, 0) direction. In each CdBr3 ribbon, Cd2+ is bonded to six Br1- atoms to form face-sharing CdBr6 octahedra. There are a spread of Cd–Br bond distances ranging from 2.79–2.94 Å. There are three inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in an L-shaped geometry to two equivalent Cd2+ atoms. In the second Br1- site, Br1- is bonded in a distorted L-shaped geometry to two equivalent Cd2+ atoms. In the third Br1- site, Br1- is bonded in a distorted L-shaped geometry to two equivalent Cd2+ atoms.
DOI: 10.17188/1268381
title: Materials Data on MnH11C5NO6 (SG:33) 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: 10.17188/1268383
title: Materials Data on RbGdO2 by Materials Project

description: RbGdO2 is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Rb1+ is bonded in a 6-coordinate geometry to six equivalent O2- atoms. All Rb–O bond lengths are 2.96 Å. Gd3+ is bonded to six equivalent O2- atoms to form edge-sharing GdO6 octahedra. All Gd–O bond lengths are 2.37 Å. O2- is bonded to three equivalent Rb1+ and three equivalent Gd3+ atoms to form a mixture of distorted corner and edge-sharing ORb3Gd3 octahedra. The corner-sharing octahedral tilt angles are 0°.
DOI: 10.17188/1268384
title: Materials Data on EuZr6(PO4)9 by Materials Project

description: EuZr6(PO4)9 crystallizes in the trigonal P-3c1 space group. The structure is three-dimensional. Eu3+ is bonded in a distorted hexagonal planar geometry to six equivalent O2- atoms. All Eu–O bond lengths are 2.48 Å. There are three inequivalent Zr4+ sites. In the first Zr4+ site, Zr4+ is bonded to six O2- atoms to form ZrO6 octahedra that share corners with six equivalent PO4 tetrahedra. There are three shorter (2.08 Å) and three longer (2.12 Å) Zr–O bond lengths. In the second Zr4+ site, Zr4+ is bonded to six O2- atoms to form ZrO6 octahedra that share corners with six PO4 tetrahedra. There are three shorter (2.03 Å) and three longer (2.21 Å) Zr–O bond lengths. In the third Zr4+ site, Zr4+ is bonded to six O2- atoms to form ZrO6 octahedra that share corners with six PO4 tetrahedra. There are three shorter (2.07 Å) and three longer (2.11 Å) Zr–O bond lengths. There are two inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four ZrO6 octahedra. The corner-sharing octahedra tilt angles range from 26–27°. There is two shorter (1.53 Å) and two longer (1.56 Å) P–O bond length. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four ZrO6 octahedra. The corner-sharing octahedra tilt angles range from 20–42°. There are a spread of P–O bond distances ranging from 1.53–1.58 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Zr4+ and one P5+ atom. In the second O2- site, O2- is bonded in a bent 150 degrees geometry to one Zr4+ and one P5+ atom. In the third O2- site, O2- is bonded in a bent 150 degrees geometry to one Zr4+ and one P5+ atom. In the fourth O2- site, O2- is bonded in a bent 150 degrees geometry to one Zr4+ and one P5+ atom. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to one Eu3+, one Zr4+, and one P5+ atom. In the sixth O2- site, O2- is bonded in a bent 150 degrees geometry to one Zr4+ and one P5+ atom.
DOI: 10.17188/1268385
title: Materials Data on Cu2BH5O6 by Materials Project

description: Cu2BH5O6 crystallizes in the orthorhombic Pnma space group. The structure is one-dimensional and consists of four Cu2BH5O6 ribbons oriented in the (1, 0, 0) direction. Cu2+ is bonded in a distorted square co-planar geometry to four O2- atoms. There are a spread of Cu–O bond distances ranging from 1.97–2.01 Å. B3+ is bonded in a trigonal planar geometry to three O2- atoms. There is one shorter (1.37 Å) and two longer (1.38 Å) B–O bond length. There are four inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.00 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.00 Å. In the third H1+ site, H1+ is bonded in a distorted single-bond geometry to one O2- atom. The H–O bond length is 1.01 Å. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Cu2+ and one B3+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Cu2+ and one H1+ atom. In the third O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Cu2+ and one H1+ atom. In the fourth O2- site, O2- is bonded in a water-like geometry to one B3+ and one H1+ atom. In the fifth O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Cu2+ and one H1+ atom.
DOI: 10.17188/1268386
title: Materials Data on PH8C2SNO2 by Materials Project

description: CH3O(CH3S)P(O)NH2 crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four [amino(methylsulfanyl)phosphoryl]oxymethane molecules. there are two inequivalent C2- sites. In the first C2- site, C2- is bonded in a trigonal non-coplanar geometry to three H1+ and one S2- atom. All C–H bond lengths are 1.10 Å. The C–S bond length is 1.82 Å. In the second C2- site, C2- is bonded to three H1+ and one O2- atom to form CH3O tetrahedra that share a cornercorner with one PSNO2 tetrahedra. There is one shorter (1.09 Å) and two longer (1.10 Å) C–H bond length. The C–O bond length is 1.45 Å. P5+ is bonded to one N3-, one S2-, and two O2- atoms to form distorted PSNO2 tetrahedra that share a cornercorner with one CH3O tetrahedra. The P–N bond length is 1.63 Å. The P–S bond length is 2.10 Å. There is one shorter (1.50 Å) and one longer (1.60 Å) P–O bond length. N3- is bonded in a distorted trigonal planar geometry to one P5+ and two H1+ atoms. Both N–H bond lengths are 1.03 Å. There are eight inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one C2- atom. In the second H1+ site, H1+ is bonded in a single-bond geometry to one C2- atom. In the third H1+ site, H1+ is bonded in a single-bond geometry to one C2- atom. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the fifth H1+ site, H1+ is bonded in a single-bond geometry to one C2- atom. In the sixth H1+ site, H1+ is bonded in a single-bond geometry to one N3- atom. In the seventh H1+ site, H1+ is bonded in a single-bond geometry to one C2- atom. In the eighth H1+ site, H1+ is bonded in a single-bond geometry to one C2- atom. S2- is bonded in a water-like geometry to one C2- and one P5+ atom. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 120 degrees geometry to one C2- and one P5+ atom. In the second O2- site, O2- is bonded in a single-bond geometry to one P5+ atom.
DOI: 10.17188/1268387
title: Materials Data on CuTe4H12C4N by Materials Project

description: CuTe4N(CH3)4 crystallizes in the monoclinic P2_1/c space group. The structure is two-dimensional and consists of four tetramethylammonium molecules and one CuTe4 sheet oriented in the (1, 0, 0) direction. In the CuTe4 sheet, Cu1+ is bonded to four Te2- atoms to form edge-sharing CuTe4 tetrahedra. There are a spread of Cu–Te bond distances ranging from 2.59–2.68 Å. There are four inequivalent Te2- sites. In the first Te2- site, Te2- is bonded in a distorted single-bond geometry to one Cu1+ and one Te2- atom. The Te–Te bond length is 3.43 Å. In the second Te2- site, Te2- is bonded in a 3-coordinate geometry to two equivalent Cu1+ and one Te2- atom. The Te–Te bond length is 2.83 Å. In the third Te2- site, Te2- is bonded in a distorted rectangular see-saw-like geometry to four Te2- atoms. There are one shorter (2.90 Å) and one longer (3.45 Å) Te–Te bond lengths. In the fourth Te2- site, Te2- is bonded in a distorted single-bond geometry to one Cu1+ and two equivalent Te2- atoms.
DOI: 10.17188/1268388
title: Materials Data on CoH14C3NCl3O2 (SG:62) 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: 10.17188/1268389
title: Materials Data on H8RuC5N(ClO)3 by Materials Project

description: RuCl3(CH3)2NH2(CO)3 is Silicon tetrafluoride-derived structured and crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four dimethylazanium molecules, twelve formaldehyde molecules, and four ruthenium (iii) chloride molecules.
DOI: 10.17188/1268391
title: Materials Data on VH24C4N4Cl7 by Materials Project

description: (VCl6)2(CH3NH3)8Cl2 is Silicon tetrafluoride-derived structured and crystallizes in the monoclinic P2/c space group. The structure is zero-dimensional and consists of four hydrochloric acid molecules, sixteen methylammonium molecules, and four VCl6 clusters. In each VCl6 cluster, V3+ is bonded in an octahedral geometry to six Cl1- atoms. There are a spread of V–Cl bond distances ranging from 2.40–2.43 Å. There are three inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a single-bond geometry to one V3+ atom. In the second Cl1- site, Cl1- is bonded in a single-bond geometry to one V3+ atom. In the third Cl1- site, Cl1- is bonded in a single-bond geometry to one V3+ atom.
DOI: 10.17188/1268392
title: Materials Data on SnH16C4(NCl3)2 by Materials Project

description: ((CH3)2NH2)2SnCl6 is Silicon tetrafluoride-derived structured and crystallizes in the orthorhombic Pnnm space group. The structure is zero-dimensional and consists of four dimethylazanium molecules and two SnCl6 clusters. In each SnCl6 cluster, Sn4+ is bonded in an octahedral geometry to six Cl1- atoms. All Sn–Cl bond lengths are 2.48 Å. There are two inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a single-bond geometry to one Sn4+ atom. In the second Cl1- site, Cl1- is bonded in a single-bond geometry to one Sn4+ atom.
DOI: 10.17188/1268393
title: Materials Data on LiBeH8CNOF4 by Materials Project

description: LiBeF4CH3NH3H2O crystallizes in the monoclinic P2_1/c space group. The structure is two-dimensional and consists of four methylammonium molecules; four water molecules; and one LiBeF4 sheet oriented in the (0, 0, 1) direction. In the LiBeF4 sheet, Li1+ is bonded to four F1- atoms to form LiF4 tetrahedra that share corners with two equivalent LiF4 tetrahedra and corners with four equivalent BeF4 tetrahedra. There are a spread of Li–F bond distances ranging from 1.88–1.91 Å. Be2+ is bonded to four F1- atoms to form BeF4 tetrahedra that share corners with four equivalent LiF4 tetrahedra. There are a spread of Be–F bond distances ranging from 1.54–1.59 Å. There are four inequivalent F1- sites. In the first F1- site, F1- is bonded in a bent 120 degrees geometry to one Li1+ and one Be2+ atom. In the second F1- site, F1- is bonded in a single-bond geometry to one Be2+ atom. In the third F1- site, F1- is bonded in a trigonal planar geometry to two equivalent Li1+ and one Be2+ atom. In the fourth F1- site, F1- is bonded in a bent 120 degrees geometry to one Li1+ and one Be2+ atom.
DOI: 10.5066/p9avxgbb
title: Nitrogen concentrations and loads and seasonal nitrogen loads in selected Long Island Sound tributaries, water years 1995-2016

description: This U.S. Geological Survey data release presents tabular data on nitrogen concentrations and loads for multiple nitrogen species, and river discharge data used in the analysis of data collected from October 1994 to September 2016. Data on flow and nitrogen concentrations were analyzed using the USGS EGRET R package, and the method of WRTDS (Weighted Regression on Time Discharge and Season). Data and outputs summarized are for water-quality data collected from 18 water-quality monitoring stations in the Long Island Sound watershed. Specific data in tabular format for this release include: calculated annual nitrogen concentration and loads, calculated annual flow-normalized nitrogen concentrations and loads by water year (for sites with 20 years of data or more), and calculated annual seasonal loads of each nitrogen constituent by calendar year. Measured daily river discharge data and sampled nitrogen concentration data for each water-quality monitoring site are available as tables accessible within R statistical software.
DOI: 10.17188/1268394
title: Materials Data on NaHCO3 by Materials Project

description: NaHCO3 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Na1+ is bonded to six O2- atoms to form edge-sharing NaO6 octahedra. There are a spread of Na–O bond distances ranging from 2.41–2.51 Å. C4+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of C–O bond distances ranging from 1.27–1.35 Å. H1+ is bonded in a linear geometry to two O2- atoms. There is one shorter (1.03 Å) and one longer (1.57 Å) H–O bond length. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to three equivalent Na1+ and one C4+ atom. In the second O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Na1+, one C4+, and one H1+ atom. In the third O2- site, O2- is bonded in a 2-coordinate geometry to one Na1+, one C4+, and one H1+ atom.
DOI: 10.17188/1268395
title: Materials Data on H6CN2O3 by Materials Project

description: 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.