Yes there are a number. The stable form at normal temperatures is alpha- iron, or ferrite. This is magnetic. At higher temperatures iron converts into gamma iron and then at even higher temperatures delta iron. These different forms have slightly different properties from alpha iron- and these are exploited when iron is worked or turned into steel.
Diamonds are the crystaline form of Carbon.
Quartzite is crystalline.
yes.
crystals
because it is an crystaline solid
A NON - CRYSTALINE
Melting the rock to its liquid form then re-freezing it into a solid will realign the rock's crystaline structure thereby altering the density.
Can iron form other compounds
Glass is Crystaline SiO2
When water, sulfur, copper, and iron are mixed, you may observe a chemical reaction. The sulfur will react with the iron to form iron sulfide, and the copper may not react with the other substances. It's important to note that chemical reactions can vary depending on the quantities and conditions of the substances involved.
The chief form of iron ore is hematite, which is a mineral form of iron(III) oxide (Fe2O3). Hematite is a common iron ore that is widely used for extracting iron.
Crystalline solids can be found in many everyday objects, such as table salt, sugar, ice cubes, and diamonds. They also occur in natural minerals like quartz and calcite. In addition, many metals form crystalline structures when they solidify, such as iron and copper.