What substance is must suitable for growing crystals?
Methods and Materials:
In a jar add to very hot water whichever substance you are working
with until saturation is reached, in this case Epsom salt, salt, sugar, and
baking soda. Pour the solution off into a clean jar, leaving behind any
undissolved substance. Suspend a thin thread into the center of the jar. If
you are using the jar lid, screw it on, this is to control the rate of evaporation.
Let sit, then after 15 minutes, swish the jar a bit. Swish it again 15 minutes
later, then one final time an hour later. Set the jar where it won’t be disturbed.
Depending on the substance used, the crystals should begin to grow in an
hour or so, and continue to grow for from a day to several days.
-Pieces of metal-Bicarbonate of soda (baking soda)
A crystal is defined as a solid body bounded by natural plane faces that
are the external expression of a regular internal arrangement of constituent
atoms, molecules, or ions. The particles in a crystal occupy positions with
definite geometrical relationships to each other, forming a kind of scaffolding
called a crystalline lattice. On the basis of its chemistry and the arrangement
of its atoms, a crystal falls into one of 32 classes; these in turn are grouped
into seven systems according to the relationships of their axes. Differences
in the physical properties of crystals sometimes determine the use to which
they can be put in industry. In crystals, however, a collections of atoms
called the Unit Cell is repeated in exactly the same arrangement over and
over throughout the entire material. Because of this repetitive nature, crystals
can take on strange and interesting looking forms naturally. When crystals are
grown there is a separating of all the building block molecules into individual
units in water and letting them fall naturally into their appropriate place in the
repetitive structure as the water evaporates.