Pt | Platinum

Basic Information

Name

Platinum

Atomic Number

Appearance

Silvery white

Phase At STP

Solid

Spectrum Image

Source

Wikipedia

Bohr Model

Static

Interactive

Descriptive Numbers

CAS Number

7440-06-04

CID Number

CID23939

DOT Number

3089

RTECS Number

RTECSTP2160000

Mendeleev Number

Pettifor Number

Space Group Number

225

Glawe Number

Mass

Atomic Mass

195.0849 Da

Uncertainty

0.009

Periodic Position

X Position

Y Position

Period

Group

Classification

Block

Abundance

Sun

0.0000018 mole ratio to silicon

Earth Crust

5e-9 g

Solar System

0.0000013 mole ratio to silicon

Meteorites

0.000098 %

Color

Jmol

#D0D0E0

Molcas Gv

#D0D0E0

CPK

#FF1493

Atomic Radius

Empirical

135

Calculated

177

Van Der Waals

175

Batsanov

205

Rahm

230

Uff

275.4

Mm3

239

Alvarez

229

Covalent (Single Bound)

128

Covalent (Triple Bound)

110

Covalent (Cordero)

136

Covalent (Pyykko)

123

Covalent (Pyykko Double)

112

Covalent (Pyykko Triple)

110

Mendeleev

130

C12

139

Metallic

138.5

Temperature

Melting/Freeze (USE)

2041.4 °K

Melting/Freeze (WEL)

2041.4 °K

Melting/Freeze (CRC)

2041.4 °K

Melting/Freeze (LNG)

2042 °K

Boiling/Density (USE)

4098 °K

Boiling/Density (WEL)

4098 °K

Boiling/Density (CRC)

4098 °K

Boiling/Density (LNG)

4097 °K

Boiling/Density (Zhang)

4100 °K

Density

STP

21.45 kg/cm³

Solid (WEL)

21090 kg/cm³

Solid (CRC)

21500 kg/cm³

Solid (LNG)

21090 kg/cm³

Liquid (CR2)

19770 kg/cm³

Heat

Molar Volume

9.09 cm³/mol

Atomic Volume

9.1 cm³

Heat Of Fusion USE

21.76 kJ/mol

Heat Of Fusion CRC

22.17 kJ/mol

Heat Of Fusion LNG

22.17 kJ/mol

Heat Of Fusion WEL

20 kJ/mol

Evaporation USE

470 kJ/mol

Evaporation LNG

469 kJ/mol

Evaporation WEL

490 kJ/mol

Evaporation Zhang

510 kJ/mol

Molar Heat

25.86 J/molK

Heat Capacity USE

0.133 J/gK

Heat Capacity CRC

25.86 J/gK

Heat Capacity WEL

25.9 J/gK

Thermal Conductivity

71.6 W/m*K

Thermal Expansion

0.0000088 1/K

Adiabatic Index

N/A

Speed of Sound

Longitudinal

3830 m/s

Transversal

1680 m/s

Extensional

2800 m/s

Electrical Resistance

80k

19.22 nΩm

273k

96 nΩm

293k

105 nΩm

298k

107 nΩm

300k

108 nΩm

500k

183 nΩm

Magnetic Properties

Order

paramanyetic

Susceptibility

1.2e-8 m3/kg

Elasticity

Shear Modulus

61 GPa

Bulk Modulus

230 GPa

Poisson Ratio

0.38 ν

Youngs Modulus

168 GPa

Hardness

Mohs

3.5

Brinell

310–500

Vickers

400–549

Etymology

Description

It is an attractive, greyish-white metal. In its pure form, it is ductile and malleable. It does not oxidize in air and is insoluble in hydrochloric and nitric acid. It is corroded by halogens, cyanides and alkalis. Hydrogen and oxygen react explosively in the presence of platinum. It has six stable isotopes and three radioisotopes. The most stable of these is Pt-193, with a half-life of 60 years. Platinum is used in jewelry, laboratory equipment, electrical contacts, dentistry, and anti-pollution devices in cars. PtCl2(NH3)2 is used in the treatment of some types of cancer. It is also present in the definition of the standard hydrogen electrode. It was discovered in South America by Antonio de Ulloa in 1735. Its name comes from the Spanish word platina, meaning silver. Platinum metal does not generally pose a health problem because it is non-reactive. However, it should be taken into account that platinum compounds are extremely toxic.

Language Of Origin

Spanish via Modern Latin

Origin Of Word

From the Spanish word platina meaning "little silver" or "silver"

Meaning

Small silver (of the Pitro river)

Symbol Origin

descriptive

Etymological Description

Since it was first encountered in a silver mine, it comes from the Spanish word platina, meaning "little silver". Platina can also mean the layer of objects found in microscopes, and in modern Spanish is platino. Platina is the diminutive version of the word plata (silver). It is also a loanword from the French plate or Provençal dialect plata, meaning "plate of metal", and comes from English plate.

Discovery & Isolation

Observed/Predicted By

A. de Ulloa

Observed/Discovery Year

1735

Discovery Location

Production & Use

Sources

It is obtained from natural or basic platinum.

Uses

It is used in jewelry, crucibles, special containers and as a catalyst. It is used together with cobalt to produce very strong magnets. It is also used to make standard weights and measures. It is resistant to abrasion and acids except aqua regia.

Radioactivity

Half Life

Stable

Lifetime

Stable

Neutron Mass Absorption

0.002

Neutron Cross Section

Electron Affinity

Electron Affinity (eV)

2.128

Electron Affinity (kJ/mol)

205.041

Electron Affinity (pauling)

2.28

Electron Affinity (allen)

10.16

Electron Affinity (ghosh)

0.25691

Dipole Polarity

Accepted

Uncertainty

C6 GB

470

Lattice

Constant Internal Default Radius

3.92

Strucutre

FCC

Angles

p/2, p/2, p/2

Electron & Quantum

Oxidation States

−3,−2,−1,0,1,2,3,4,5,6

Electron Configuration

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s1 4f14 5d9

Quantum Number

Electron Configuration Semantic

[Car] 4f14 5d9 6s1

Shells-0

Shells-1

Shells-2

Shells-3

Shells-4

Shells-5

Ionization Energies-0

870

Ionization Energies-1

1791

List of Compounds

1-10 of 90 compounds

Rows per page:

Formula	Names
Pt	platinum platinum metal
PtBr2	platinum(II) bromide dibromoplatinum platinum bromide platinum dibromide
PtCl2	platinum(II)chloride dichloroplatinum muriate of platinum platinous chloride platinum chloride platinum dichloride
PtCl4	platinum(IV) chloride platinum(IV) tetrachloride platinum tetrachloride tetrachloroplatinate tetrachloroplatinum
F4Pt	platinum(IV) fluoride
F6Pt-2	platinum(VI) fluoride
PtI2	platinum(II) iodide diiodoplatinum iodoplatinate platinous iodide platinum diiodide
I4Pt	platinum(IV) iodide platinic iodide platinum tetraiodide tetraiodoplatinum
OPt	platinum(II) oxide
PtO2	platinum(IV) oxide adams' catalyst Adam’s catalyst diketoplatinum dioxoplatinum platinic oxide platinum dioxide platinum oxide

...

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