Is glass a crystalline sunbstance?
84127
No....glass is considered an amorphic substance. In other words, its structure looks the same in all directions from within the material.
151094
Glass is a manmade material that is made of melted sand that has been shaped and molded. Crystals are naturally occouring mineral formations caused by extreme pressure and heat from rock layers when the crystals are formed. They are similar (in that they can both be caused by heat), but one is natural and one is manmade. Crystals also have much more magical energy.
981452
I don't think any natural crystal changes throughout the day.  There are manmade ones that do, and it has to do with temperature.  Also, some natural crystals have different colors or tones, depending on the direction you look through them, if you are using polarized light.  This is called "pleochroism".
77153
Glass is composed of mainly silicone, heated to a high temperature until it forms a supercooled liquid. Sand is the most common form of raw material used in making glass though silica is sometimes used. Other materials can be added in to give extra strength or changes in its composition to make specialized products such as pyrex, coloration and certain metals are added to add colour to it.
246934
A crystal is a type of structure. What makes something diamond, sapphire, quartz, etc, is its chemical composition.
48432
Well, I work with glass for a living, and for me, two different types of glass are Moretti and Boroscilicate. Boro glass is commonly referred to as Pyrex; it has a higher melting temperature and, when annealed (cooled) properly, is very resistant to breaking. Moretti is a softer, soda-lime glass, with a lower melting temperature (this is the kind I typically work with.) in my sources i've put some links to some glass sellers who could tell you more about different types of glass.
346695
An alum solution with water makes a very nice crystal and is hydrated.  Check out this website with how to grow crystals: \n\nhttp://chemistry.about.com/cs/howtos/ht/alumcrystal.htm\n\nIn short, A hydrated crystal is a crystal that contains water as part of its chemical formula and structure. It may or may not absorb water vapor from the atmosphere. A crystal that is hygroscopic is one that absorbs water\nvapor from the atmosphere. CaCl2 and P2O5 are examples.
1082745
I worked for a manufacturing plant that supplied this type of glass to it's vendors. We called it "micro-sheet glass".  It came to us in pizza shaped boxes, with many sheets per box. Very thin stuff. It came in different thicknesses. Some as light and thin as a sheet of paper. There were many steps involved in manufacturing these parts before they actually left the plant. As far as if they cracked, I am not sure about how it would be replaced. But am sure there must be another type of protection for that.
1155007
Crystal growth can occur at about any speed, but if you want a regular single crystal, the slower it grows the less likely are defects. Sudden growth leads to snowflake-like dendrition. Certain minerals like e.g. diamond require some time and extreme conditions to crystallize.\n\nWindows for IR purposes can be either defined minerals or glasses. While glasses are formed by undercooling melts, for some mixtures that might take longer.
115545
The strict materials definition of glass is a uniform amorphous solid material produced when a suitably viscous molten material cools very rapidly not giving enough time for a regular crystal lattice to form.\nNormal glass like in a window is made from mostly silicon dioxide.\nMany different manufacturing processes, the most used is the float or annealing process.
771649
Do you mean supercooled substances?\n\nIf so, glasses are the best example and are made by melting a salt and quickly cooling it so that it does not return to its original form.  I don't believe you should have any trouble pointing out the various contributions of glass to our lives.
711134
No. Most sugars can be crystallized.
1106988
Glass is made from sand (its the silica in the sand).  Solar Cells *i think* are also made of silica.  So, if your country has a lot of sand (desert or beaches) that would be a start.\n\nGold occurs where gold occurs.  Its either there or it isn't; the past geologic events would have had to do something to cause gold to be deposited in an area.  The only way to find out is to look.\n\nAlso, areas in & around volcanoes can be sources of many natural resources that are found deep in the earth but are brought to the surface as a result of the volcanic activity.
421431
Well if you are talkin about a mirror made of floated glass a layman can c the quality of it other wise ind. know how is required i think (i am not proffesional in it, just being in a float glass plant for a week). If it is a mirror and you c a distracted reflection then b sure that there is impurity in the glass, as well as the transparency of float glass is supposed to be very high compares to the conventional one.
961759
1) Naturally occurring\n2) Inorganic\n3) An ordered crystalline structure
952406
Crystals of inorganic compounds.\nArsenic poisonings.\nMetalurgy and alloys.
371665
Well.. you say white light it's not refracted by glass... Then if that's true, there shouldn't be a rainbow EVER, no?\nThat's the point, white light it's composed by several colors, that's why it's white. When it goes through a glass, it WILL be refracted, causing it to separate into different spectres of light. Of course, only a minimal part of it will be refracted, for those glasses are constructed in such a way to prevent it from doing so.