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Iridium

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E-mail address Deja - 11/20/2014 2:14:08 AM

Does anyone know how to make a bhor model of iridium?

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E-mail address noneya - 12/6/2010 8:35:20 PM

What is the standard state of iridium?!

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E-mail address brandon crossnoe - 6/2/2008 9:14:42 PM

how many protons, neutrons and electrons are in iridium?

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E-mail address Lyra - 11/20/2007 6:44:04 AM

I need to know what family would most likely combine with this family [9]... thanks to whoever would answer!

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E-mail address Hadi - 10/17/2007 12:27:15 PM

Dear Sir,
We have some iridium metal and want to determine the purity percent and some impurity in it. Do you know how we can dissolve it?
thanks

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E-mail address arun - 1/20/2006 5:24:53 AM

  E-mail address Patricia Fousek - 9/2/2002 8:20:26 PM
  I have this element as a high school home work assignment and i can not find out what it is commonly used in is there any website or anywhere where I can find out directly what this element is commonly used in today?

IRIDIUM
The essentials
Name: iridium
Symbol: Ir
Atomic number: 77
Atomic weight: 192.217 (3)
CAS Registry ID: 7439-88-5
Group number: 9
Group name: Precious metal or Platinum group metal
Period number: 6
Block: d-block

Description
Here is a brief description of iridium.
Standard state: solid at 298 K
Colour: silvery white
Classification: Metallic
Availability:
iridium is available in many forms including foil, sheet, wire, "evaporation slugs", powder, and sponge.
Ruthenium, rhodium, palladium, osmium, iridium, and platinum together make up a group of elements referred to as the platinum group metals (PGM).
The name iridium is appropriate, for its salts are highly coloured. Iridium is white, similar to platinum, but with a slight yellowish cast. It is very hard and brittle, making it very hard to machine, form, or work. It is the most corrosion resistant metal known, and was used in making the standard metre bar of Paris, which is a 90% platinum-10% iridium alloy. This metre bar has since been replaced as a fundamental unit of length (see Krypton).
Iridium is not attacked by any of the acids nor by aqua regia, but is attacked by molten salts, such as NaCl and NaCN.
Isolation
Here is a brief summary of the isolation of iridium.
It would not normally be necessary to make a sample of iridium in the laboratory as the metal is available, at a price, commercially. The industrial extraction of iridium is complex as the metal occurs in ores mixed with other metals such as rhodium, palladium, silver, platinum, and gold. Sometimes extraction of the precious metals such as iridium, rhodium, platinum and palladium is the main focus of a partiular industrial operation while in other cases it is a byproduct. The extraction is complex because of the other metals present and only worthwhile since iridium is useful as a specialist metal and is the basis of some catalysts in industry.
Preliminary treatment of the ore or base metal byproduct is required to remove silver, gold, palladium, and platinum. The residue is melted with sodium bisulphate (NaHSO4) and the resulting mixture extracted with water to give a solution containing rhodium sulphate, Rh2(SO4)3. The insoluble residue contains the iridium. The residue is melted with Na2O2 and extracted into water to remove ruthenium and osmium salts. The residue contains iridium oxide, IrO2. Dissolution of the oxide in regia (a mixture of hydrochloric acid, HCl, and nitric acid, HNO3) gives a solution containing pure (NH4)3IrCl6. Evaporation to dryness and burning under hydrogen gas gives pure iridium.
Isolation
Here is a brief summary of the isolation of iridium.
It would not normally be necessary to make a sample of iridium in the laboratory as the metal is available, at a price, commercially. The industrial extraction of iridium is complex as the metal occurs in ores mixed with other metals such as rhodium, palladium, silver, platinum, and gold. Sometimes extraction of the precious metals such as iridium, rhodium, platinum and palladium is the main focus of a partiular industrial operation while in other cases it is a byproduct. The extraction is complex because of the other metals present and only worthwhile since iridium is useful as a specialist metal and is the basis of some catalysts in industry.
Preliminary treatment of the ore or base metal byproduct is required to remove silver, gold, palladium, and platinum. The residue is melted with sodium bisulphate (NaHSO4) and the resulting mixture extracted with water to give a solution containing rhodium sulphate, Rh2(SO4)3. The insoluble residue contains the iridium. The residue is melted with Na2O2 and extracted into water to remove ruthenium and osmium salts. The residue contains iridium oxide, IrO2. Dissolution of the oxide in regia (a mixture of hydrochloric acid, HCl, and nitric acid, HNO3) gives a solution containing pure (NH4)3IrCl6. Evaporation to dryness and burning under hydrogen gas gives pure iridium.

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E-mail address arun - 1/20/2006 5:22:36 AM

Can any one send me a detail description of Iridium. I will be so thankful to him

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kimbob - 10/10/2003 3:10:32 AM

  E-mail address caitlin - 3/3/2003 12:48:12 AM
  I NEED TO KNOW DANGERS AND HAZARDS FOR IRIDIUM IT WOULD BE MUCHLY APRECIATED IF NE ONE COULD HELP or if ne other usefull information could be explained to me! thanx a bunch
love caitlin

having the same prob as you/ is this for a chemistry proj?

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E-mail address caitlin - 3/3/2003 12:48:12 AM

I NEED TO KNOW DANGERS AND HAZARDS FOR IRIDIUM IT WOULD BE MUCHLY APRECIATED IF NE ONE COULD HELP or if ne other usefull information could be explained to me! thanx a bunch
love caitlin

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E-mail address Patricia Fousek - 9/2/2002 8:36:24 PM

  E-mail address paris - 2/1/2001 7:57:34 PM
  if anybody can help me make aan atom model of the element iridium, e-mail me with ideas, or blueprints please

Hey just instant message me on aol instant messanger if you got it and i'll explain it there. (solicity86)

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E-mail address Patricia Fousek - 9/2/2002 8:20:26 PM

I have this element as a high school home work assignment and i can not find out what it is commonly used in is there any website or anywhere where I can find out directly what this element is commonly used in today?

  Reply

E-mail address paris - 2/1/2001 7:57:34 PM

if anybody can help me make aan atom model of the element iridium, e-mail me with ideas, or blueprints please

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