Crystals start to form by a process called nucleation. This process can either start with the molecules themselves (unassisted nucleation), or with the help of some solid matter that is already in the solution (assisted nucleation). When molecules of the "solute" (the stuff of which you want to grow crystals) are in solution, most of the time they see only solvent molecules around them. However, occasionally they see other solute molecules. If the compound is a solid when it is pure, there will be some attractive force between these solute molecules. Most of the time when these solute molecules meet they will stay together for a little while, but then other forces eventually pull them apart. Sometimes though, the two molecules stay together long enough to meet up with a third, and then a fourth (and fifth, etc.) solute molecule. Most of the time when there are just a few molecules joined together, they break apart. However, once there becomes a certain number of solute molecules, a so-called "critical size" where the combined attractive forces between the solute molecules become stronger than the other forces in the solution which tend to disrupt the formation of these "aggregates". This when this "protocrystal" (a sort of pre-crystal) becomes a nucleation site. As this protocrystal floats around in solution, it encounters other solute molecules. These solute molecules feel the attractive force of the protocrystal and join in. That's how the crystal begins to grow. It continues growing until eventually, it can no longer remain "dissolved" in the solution and it falls out (as chemists like to say) of solution. Now other solute molecules begin growing on the surface of the crystal and it keeps on getting bigger until there is an equilibrium reached between the solute molecules in the crystal and those still dissolved in the solvent. Pretty much the same thing happens as in unassisted nucleation, except that a solid surface (like a stone, or brick) acts as a place for solute molecules to meet. A solute molecule encounters the surface of a stone, it adsorbs to this surface, and stays on it for a certain time before other randomizing forces of the solution knock it off. Solute molecules will tend to adsorb and aggregate on the surface. This is where the protocrystal forms, and the same process as described above happens. You can probably see why, from what I wrote above, crystals grow fastest in a solution in which the concentration is near saturation. If there are more solute molecules in a given volume, then there is more of a chance they will meet one another. You also don't want to heat up the solution because that acts as the major randomizing force in solution which causes the aggregates of molecules to break up.
Answer: Crystals usually form from molten rock as the molten rock gradually cools. If the molten rock cools very rapidly, then either small crystals form or no crystals form. An example of this is when lava is ejected from a volcano. If molten rock cools slowly, then large crystals can form. This happens usually when the molten material is very deep in the Earth. Examples of these types of crystals are diamonds, emeralds, rubies, etc.
Viruses can form crystals and they can survive in this form for many years. however the HIV that causes Aids cannot do this .
The crystals have abundant room to grow in their hollow surroundings also the crystals can form very easily in many places.
The size of the crystals that do form are smaller/microscopic in that the time an temperature for crystals to grow is cut. The type of mineral that crystallizes is also effected,
crystals
Yes. Salts can form crystals (salt crystals).
a saturated solution will form crystals
When magma coos slowly, it allows large crystals to form. The process of evaporation helps to form crystals.
Gatorade will form crystals faster because it contains electrolytes, which are a form of salt. Salts are crystals, thus your answer. Pure water will not form crystals at all unless it reacts with another substance.
Most minerals form crystals.
Most minerals form crystals.
Table salt is made of many tiny crystals. When you mix these salt crystals with water, they dissolve, losing their crystalline form. When the water evaporates, the salt crystals form once again.
It is unusual for crystals to form on paper clips. Possibly if you use them to stir your coffee you might get sugar crystals.
Many inorganic or organic compounds form crystals.
Crystals form in the shapes of hexagons or six-sided prisms.
they do not form when heated! they form crystals when they are frozen bu a freezer or room tempreature.
Answer: Crystals usually form from molten rock as the molten rock gradually cools. If the molten rock cools very rapidly, then either small crystals form or no crystals form. An example of this is when lava is ejected from a volcano. If molten rock cools slowly, then large crystals can form. This happens usually when the molten material is very deep in the Earth. Examples of these types of crystals are diamonds, emeralds, rubies, etc.