whats difference between silica sand and quarts powder?
107720
I believe that Silicon Dioxide is Quartz
242517
Granite hornblende is a source of silicon.\nAs a start, have a look here:
152725
Sand oil is mixed in with sand.  The separation process is more expensive because you have to heat the sand oil to separate the oil from the sand.  With liquid oil, it is just pumping it out of the ground.
180275
Silica is simply SiO2, so silica oxide really is no diferent than just silica.  Silica is very common in the world in the form of sand, and therefore doesn't usually need to be synthesized, although it is ustually ground and sieved to acquire only one particle size for abrasives.
99480
generally C.Iron castings made of green sand mould are known as sand casting.\nsand casting are cheaper for producing few nos of requirement.\nsand casting have inherent defects like blow holes,porosity,crack, and rough surface finish.
198871
Silica sand.\n\nhttp://www.publicbookshelf.com/public_html/The_Household_Cyclopedia_of_General_Information/howtomak_cge.html
923334
Quartz is the mineral that has the best combination of durability and abundance, so much sand is quartz.  It is hard and common, so it must be a typical component of cement.
782906
http://www.jungletreasure.com/ceramic.htm
959066
Try Wikipedia.org...Qualitative inorganic analysis. I was just there.
1132137
I've heard of people claiming you can smelt aluminum, etc., in a microwave oven, if you use silica bricks to contain the heat. You might also need to use a graphite crucible, which will heat up but that the molten metal will not stick to. \n\nFinally, since magnesium is SO flammable (but that's why you want to smelt it, to make inconspicuous incendiary devices, right? you dirty little terrorist) you need to have a continuous stream of some non-oxidizing gas, such as nitrogen, flowing through the oven while it is in use.\n\nBottom line? Don't try this at home. You'll get yourself killed if you're lucky, burned and crippled for life if you're not. And I'm asking the yahoo people to contact the local law enforcement authorities in your area.
717989
All soil is made of rock and organic matter, varying in size, uniformity, and composition... so sand is rock or organic matter, at a very small and uniform scale.
226731
sand could be considered covalently bonded material.  which in very simple terms...when added to water it will not dissolve. Salt on the other hand is ionic allowing it dissolve in water.  Sand is often made of a silicon crystal lattice, where a common table salt is sodium chloride.
202372
It can be a powder, but that's usually cheap bunk shit thats around $10 a gram. It can look like a salt, most of it technically is(hydrochloride), anywhere from tiny uniform shards that are almost white because theyre so small, to bigger broken up shards that are clear with white in the cracks where they broke it up, to big fist sized shards that are clear. It can also be a dirty green or tan transparent which indicates the anhydrous ammonia wasn't cooked out all the way, or light pink transparent that actually can mean it's pretty good purity but the cook put in a small impurity to turn it that color kinda like a trademark.
554062
you need to see whethre the "grains " ae INTERLOCKING, or fixed togethre with a cement. Interlocking grains, whee there are no spaces between them (the "grains" wi be crstals of quartz, felspar and ther minerals depending on type of rock) are indicative of an igneous rock. (or metamorphic) rock. sdimentar rocks are generally made of "clasts" or grains cemented together with a matrix or cement. here are some exceptions to this like evaporites, eg rock salt.
703711
Well, I can only partly answer your questions.\nPorosity is a measure of whether a rock has empty spaces in it. That's important because the rock could hold water or oil, for example.\nPermeability is a measure of whether fluids can move around in a rock--are the pore spaces connected to each other or not? That's important because water or oil can't really move through rocks that are not permeable. \n\nSandstone, which is a rock made of small particles, can be very porous and very permeable--depending on how well the grains have been cemented together, and also whether it has fractures, etc. \nNow..to the tricky part of your question: about rose quartz. Quartz is a mineral. A single crystal of quartz will have essentially zero porosity or permeability(unless its full of cracks). You could make a nice water bowl out of rose quartz because it wouldn't leak or soak up the water. But sandstone could be made entirely of rose quartz grains cemented together....So....the rose quartz sandstone could be porous and could be permeable...or not, depending on how well it was cemented.\nCalcite...is a mineral. same story. A pure crystal would have essentially no porosity or permeability. But, calcite grains could make up a sandstone (see above). Also, limestone is made of calcite (or aragonite), and it can be both highly porous and permeable--that's why there are so many caves in limestone.\n\nYou don't ask a question about grain sorting, so I don't know how to respond. I'm guessing you want to know how it relates to porosity and permeabilty. Imagine dumping a bunch of marbles of the same size into a barrel. They would be perfectly sorted (same size and shape), and you could calculate how much water you could pore into the barrel to fill up the spaces between the marbles. Now imagine filling up the same barrel with items of all different shapes and sizes (poorly sorted). You could imagine that it could hole more water than the marble-filled barrel, UNLESS, PERHAPSyou happened to pore in lots of sand or other fine particles in with your big items. \nSandstone can be well-sorted (think of nearly pure quartz sand in sand dunes), or poorly sorted (think of sand in a river bottom).\nBecause rose quartz and calcite are minerals,  they could be components of well sorted or poorly sorted sands. BUT, calcite is softer than quartz, so...it would be much less common in well-sorted sands--which tend to be, but not always, quartz- rich. Beach sand, for instance, can be moderately well-sorted and composed mainly of quartz sand but with  tiny calcite shell fragments.
602445
Glass is made of sand. Sand has the chemical formula of SiO2 (silicon dioxide). Although it seems to "look" like a base and some may expect it to react with an acid, this appearance is not true.\n\nSilicon is a non-metal and silicon dioxide is a macromolecule with a giant structure like that of diamond (tetrahedral). I.e. one silicon atom is attached to 4 oxygen atoms and the total ratio of Si to O is 1:2 (thus the chemical formula).\n\nDue to this, the macromolecule doesn't react with acids and so it is safe to carry acids of very high concentrations.
874306
The sizes of the sand grains vary thus their number in one 8 oz cup will vary also. For example, coarse sand granule is between 0.020 and 0.39 in, while very fine sand granule is between 0.0025 and  0.0049 in. I hope my answer was of help to you.