Ir

Ir
Iridium is a rare, precious metallic element which is hard, brittle and has a low ductility.
IRASER
Abbreviation of Infrared Amplification by Stimulated Emission of Radiation.
IrF4
Chemical formula for Iridium IV Fluoride.
IrF5
Chemical formula for Iridium V Fluoride.
IrF6
Chemical formula for Iridium VI Fluoride.
Iridium
A rare, precious metallic element which is hard, brittle and has a low ductility.
Iridium Hexafluoride
Alternative name for Iridium VI Fluoride.
Iridium IV Fluoride

IrF4

Dark brown solid.

Iridium IV Oxide

IrO2

The only well characterised oxide of iridium.

Iridium Pentafluoride
Alternative name for Iridium V Fluoride.
Iridium Tetrafluoride
Alternative name for Iridium IV Fluoride.
Iridium V Fluoride

IrF5

A highly reactive yellow low melting solid.

Iridium VI Fluoride

IrF6

A volatile and highly reactive yellow solid, with an octahedral molecular structure.

Iridosmine
Iridosmine (osmiridium) is a naturally occurring alloy of osmium and iridium.
Iris
The pigmented fibrovascular tissue known as a stroma. It is the most forward portion of the eye and the only one seen on superficial inspection.
IrO2
Chemical formula for Iridium IV Oxide.
Iron
One of the most abundant metallic elements (41000 ppm) and probably one of the most important, being used on the largest scale of any metal.
Iron Air Battery
Uses electrodes made of iron and carbon.
Iron Foundry
A place where iron castings are made.
Iron Hydroxide

FeO(OH)

Found as the minerals Siderogel and Feroxyhyte. It also has a variant known as Lepidocrocite.

Iron II Chloride

FeCl2

Pale yellow to white crystalline solid.

Iron II Hydroxide

Fe(OH)2

Green colour.

Iron II Oxide

FeO

Black colour powder. The powder in particular can cause explosions as it readily ignites.

Iron II Sulphate

FeSO4

Also known as the mineral Melanterite or Copperas. Green Vitriol is hydrated Iron II Sulphate.

Iron II Sulphide

FeS2

A brassy yellow colour. Also known as pyrite, iron pyrites and fools gold.

Iron III Chloride

FeCl3

Brown black or green crystalline solid.

Iron III Oxide

Fe2O3

Known in its natural state as Haematite, but also purified for use as a coating in magnetic audio and computer media, where it is known as Ferric oxide.

Iron Pyrites
Old name for Iron II Sulphide.
Iron Sulphide

FeS

White crystalline solid.

Ironing
Thinning the walls of deep drawn articles by reducing the clearance between punch and die.
Irradiance
The direct, diffuse, and reflected solar radiation that strikes a surface. Usually expressed in kilowatts per square meter. Irradiance multiplied by time equals insolation.
Irradiation Illusion
An illusion of visual perception in which a light area of the visual field looks larger than an otherwise identical dark area.
Irrational Number
Any number that cannot be expressed as the ratio of two integers.
Irregular Fractals
Complex fractals whose dimension is often difficult to determine and in some cases is unknown.
Irreversible Electrode
An electrode with an irreversible electrode reaction.
Irreversible Process
Any real process; when a system undergoes the changes State 1 -> State 2 -> State 1 by any real pathway, the universe is different that before the cyclic process took place in the system.