What do a glittering diamond and a lead pencil have in
common? Diamonds are very hard and the graphite of the pencilâ€™s
tip is very soft. These two different substances contain a wonderful proof
of creation called carbon.
A rough, unpolished diamond is the hardest of all minerals.(1)
For this reason, a crystal diamond is used to cut and to drill all kinds
of material and is also used as an abrasive to smooth surfaces. (2)
Hardness is the resistance of a mineral to scratches from outside forces;
it is easy to recognize minerals by this trait. By scratching one mineral
with another, their relative hardness can be determined. Scientists use
a point system to designate the hardness of all minerals. They rate diamonds
with the highest ratio of ten over ten. So, what makes diamonds so hard?
It is very interesting that the soft, breakable graphite in a pencil
tip is made up of the same atoms as a diamond. Graphite is composed of
the same carbon atoms as a diamond. But, while one is very soft, the other
is extremely hard. One is as black as a lump of charcoal; the other may
be sparkling bright. One is commonly found in nature; the other is rare.
For all these reasons, diamonds are much more valuable than graphite.
How is it then, that carbon atoms can be so different from one another?
Carbon: The Foundation of Life
(The Value of Diamonds is Determined by its Atoms)
Before we consider the differences, we must speak about the carbon atoms
that make up a diamond. The carbon atom is very important for living creatures.
Nevil Sidgwick, the English chemist, states the following in his book,
Chemical Elements and Their Compounds:
Carbon is unique among the elements in the number and variety of the
compounds which it can form. Over a quarter of a million have already
been isolated and described, but this gives a very imperfect idea of
its powers, since it is the basis of all forms of living matter. (3)
The class of compounds formed exclusively from carbon and hydrogen are
called hydrocarbons. This is a huge family of compounds that include natural
gas, liquid petroleum, kerosene, and lubricating oils. The hydrocarbons
ethylene and propylene form the basis of the petrochemical industry. Hydrocarbons
like benzene, toluene, and turpentine are familiar to anyone who has worked
with paints. The naphthalene that protects our clothes from moths is another
hydrocarbon. Hydrocarbons combined with chlorine or fluorine form anesthetics,
which are the chemicals used in fire extinguishers and the Freon used
As one can see, carbon is very important; it is what makes the diamond
a rare mineral. A diamond has no rival for being the finest example of
a crystalline structure in the world. The carbon atoms that give the diamond
crystal its hardness have an ideal geometric design. Graphite is also
formed from carbon but its atoms are not ordered as in a diamond. Scientists
describe this difference by the world allotropy.
The Concept of Allotropy
The difference, in the arrangement of space, in the atoms that make
up the structure of an element is called allotropy. The atoms
that produce the structure are called allotrope atoms. We can explain
this with the following example:
Imagine that we have bought three loads of 10,000 bricks each and that
all these brinks are identical to one another. We have sent these brinks
to three different bricklayers who will each build a wall to their own
design independently of the others.
-Would the walls be identical?
-Would they all have the same sturdiness?
-Would the artistic arrangement of the bricks be similar?
If the answer to these questions is yes, the wall will not be allotropic.
If the answer to these questions is no, we can call the walls allotropic.
Oxygen and ozone are allotropes of oxygen atoms.
Diamonds, graphite, and amorph carbon are allotropes of carbon atoms.
White phosphorus and red phosphorus are allotropes of phosphorus atoms.
Rhombic sulfur and monocline sulfur are allotropes of sulfur.
Characteristics of Allotrope Atoms:
- The atom and its atomic number are the same.
- Their molecular geometry is different.
- They have different inclinations to enter chemical reactions, but the
compounds formed by such a reaction are the same.
- The molecular sturdiness is different.
Some physical characteristics of diamonds and graphite have been explained
All the qualities that give diamonds their value are related to conditions
that emerge during their formation. For the natural formation of a diamond,
excessive heat and pressure are needed. Diamonds are formed deep in the
earthâ€™s crust. Bits of melted diamond may erupt to the surface and
freeze but this happens very rarely. This is the reason why there are
very few diamond deposits in the world and why the number of rich deposits
is very small.
The natural structure and formation of diamonds has shown scientists
the way to produce artificial diamonds. Diamonds have been produced in
experiments in which graphite has been subjected to 100 thousand atmospheres
of pressure in 3000-degree heat. However, synthetic diamonds are not as
valuable as natural ones but because of their hardness, they are used
as industrial abrasive.
Where Diamonds are Used:
Three Kinds of Diamonds:
1.) Original Diamonds: These are the original,
valuable diamonds. They are measured in karats. One karat equals 0.205
grams. They are used as jewelry.
2.) Bort: A semi-transparent and striated
diamond. It is harder than an original diamond and it is used to carve
high quality diamonds. In the drilling industry, these diamonds are used
for drill bits.
3.) Carbonado: This is a black, uncarved
diamond. It is harder than an original diamond and it is used in the manufacturing
of drilling equipment.
As Sidgwick has pointed out, the carbon atom, which has only six protons,
six neutrons and six electrons is a genuine/true miracle. The fact that
a difference in the arrangements between the atoms produces such differences
that yield such incredible possibilities for human beings is enough to
understand that these formations come from the grace of Allah. Like every
proof of creation in nature, Allah has created carbon and diamonds with
all their qualities.
What is in the heavens and in the Earth belongs to Allah. Allah encompasses
all things. (Qurâ€™an, 4:126)
|Permeability to Light
1 L. Vlasanov
& D. Trifonov, 107 stories About Chemistry, Mir Publishers, 1977.
3 Nevil V.Sidgwick, The Chemical Elements and Their Compounds, vol.1, Oxford:
Oxford University Press, 1950, s.490