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Does crystalline glass exist? - Chemistry Stack Exchange In European rules, "lead crystal" implies more than 24% lead oxide in the formula There have been concerns about lead leaching from lead glass, so that alternatives such as barium have been replacing lead Manufacturers are permitted to call low-lead or "lead-free" glass "crystal glass" or "crystalline glass"
inorganic chemistry - Why is sand, sand; and why is glass, glass; While . . . While a glass maker can take his glass and let it cool in the atmosphere or in water, molten silicate magma ("glass") deep in the Earth is surrounded by rocks that are in the hundreds of degrees This slow cooling facilitates crystallization of the SiO 2 into quartz rather than glass
glass - How to identify lead crystal glassware? - Chemistry Stack Exchange $\begingroup$ Normal glass has a density of $\approx 2 4 \; \mathrm{g m^3}$ and lead glass $\ge 3 1 \; \mathrm{g m^3}$ so I am surprised that you have found this to be non-discriminating The difference in refractive index will be harder to measure unless you have the apparatus but you can measure the density with scales and via Archimedes
What is the difference between an amorphous solid and glass? While a glass is generally considered to be a supercooled, configurationally frozen liquid, not all amorphous solids are glasses For example, amorphous silicon is a four-fold coordinated semiconducting solid, much like crystal silicon Liquid silicon is 8-12 fold coordinated with metallic bonding
Temperature Dependence of Crystal Formation in Storm Glass The liquid in the glass is a mixture of distilled water, ethanol, potassium nitrate, ammonium chloride, and camphor and it has been shown that the crystals which form are camphor To be more specific, it is a camphor-ethanol solution with aqueous ammonium chloride and potassium nitrate solution
How does HF dissolve glass? - Chemistry Stack Exchange $\begingroup$ I know the reaction, but my question is about mechanism how does this happen, does fluorine go interstities of the glass or h+ or the kinetic energy is responsible for it Technically, HF doesn't dissolve glass since a solvent does not react with your compounds ; thats why I said does it disintegrate glass then because of what
How Amorphous solids are converted to Crystalline? The barrier separating random order and crystal state can, contrary to the general practice, be exceeded for a small minority of energetic atoms and molecules, according to Maxwell theory And once a crystalline arrangement is started at some point of the solid it is more stable So it will not go back as easily to random structure
decomposition - What are the crystals that have formed around the top . . . $\begingroup$ A simple test is to wet a piece of red litmus paper and stick it on the bottom of a watch glass Dissolve the crystals in water in a beaker Add a couple of NaOH pieces Put watch glass on top of beaker The NaOH should release NH3 in air which would turn red litmus blue $\endgroup$ –
experimental chemistry - What is the correct name for this lab . . . Take a glass rod and rub vigorously the wall of the flask, the substance will crystallize out of the solution Take a fire polished stirring rod and etch (scratch) the glass of your beaker The small pieces of glass that are etched off of the beaker serve as nuclei for crystal formation
Why is glass a mixture and not a solution? Glass (substance) is a glass (phase) - a solid without the regular order of a crystal "clearly" it is homogenous :-) Of course, exceptions exist that will refute my examples, but the bottom line is that a homogenous mixture and a solution are physically the same, but differentiated for convenience