this slideshare is about the applications of osmium and iridium.

1. APPLICATIONS OF OSMIUM AND
IRIDIUM
PRESENTED TO : MAM ANAM ZULFIQAR
PRESENTED BY : AYZA JABEEN
DEPARTMENT OF CHEMISTRY

2. INTRODUCTION TO OSMIUM
Discovered by the British
chemist Smithson Tennant in
1803.
Identified in the black
residue remaining after
dissolving platinum ore
with aqua regia.
Osmium is present in 8th
group and 6th period. The
metal is not toxic

3. APPLICATIONS OF OSMIUM
• Due to its rarity and hence expense,
osmium has a limited number of
applications.
Osmium can be used as an alloying
agent, where it adds hardness to the
resultant metal. Examples include
platinum or indium.
Certain alloys of osmium and platinum
are used in the manufacture of
specialized laboratory equipment,

4. CONTI………
Finely divided osmium metal can be
used as a catalyst e.g. In the process
of forming ammonia by combining
hydrogen and nitrogen.
Hard alloys can be produced by using
osmium. Osmium alloys are used in
ball point pen tips, fountain pen tips,
record player needles,
Early light bulb filaments used
osmium. This was later replaced by

5. CONTI……….
Osmium tetroxide is highly volatile
and strongly oxidizing and is
beneficial in the chemical industry
as long as one takes sufficient
precautions.
Osmium tetroxide is used for
staining biological samples for
microscopic examination and for
fingerprint detection.

6. INTRODUCTION TO IRIDIUM
Discovered by the British
chemist Smithson Tennant in
1803.Identified in the black
residue remaining after
dissolving platinum ore
with aqua regia.
Iridium is in 9th group and
6th period. Iridium is
considered to be of low
toxicity.
Iridium in powder form is a known
irritant and is a fire hazard.

7. APPLICATIONS OF IRIDIUM
• Historical uses
ir-os alloy was used to tip fountain pen nibs.
The pigment, IR- OS black is used for
painting porcelain an intense black.
• Medical uses
Ir-192 is used as source of gamma radiations for
treatment of cancer. In February 2019, medical
scientists announced that iridium attached
to albumin , creating a photosensitized molecule
, can penetrate cancerous cells and, after being
irradiated with light (a process
called photodynamic therapy), destroy the cancer
cells.

8. CONTI….
•Industrial Uses
Long life aircraft engine parts are made of
iridium alloy.
Devices that are subjected to extremely
high temperature are made of iridium. E.g.
Crucibles.
Iridium is a good catalyst for the
decomposition of hydrazine and to produce
acetic acid.
 used in practice in low-thrust rocket
engines.
It is also used as catalyst An iridium–

9. CONTI…….
•Scientific applications
• An alloy of 90 % platinum and 10 %
iridium was used in 1889 to
construct the international prototype
meter & kilogram mass kept by the
international bureau of weights and
measures.

10. REFERENCES
• https://en.wikipedia.org/wiki/iridium
• https://www.rsc.org/periodic-table/element/77/iridium
• https://www.chemicool.com/elements/iridium.html
• https://en.wikipedia.org/wiki/osmium
• https://www.rsc.org/periodic-table/element/76/osmium
• https://www.azom.com/article.aspx?articleid=6061
• https://study.com/academy/lesson/what-is-osmium-uses-facts-
information.html