A positive uniaxial crystal has the refraction index of e-ray (ne) is smaller than that of the e-ray (ne). A positive biaxial crystal has its β closer to α than to γ. Examples. Quartz, calcite, rutile, etc. All the monoclinic, triclinic an orthorhombic crystal systems. Is Topaz a uniaxial crystal?Read More →

Because with potentially high levels of lead contained within the crystal, that innocuous-looking decanter can leach lead into the alcohol, in as little as an hour, creating a dangerous drink. … It’s difficult to be certain if lead is present in old crystal, and even more difficult to ascertain whatRead More →

When water freezes and ice crystals form there is actually a small amount of heat produced. The temperature of the water remains at 32°F as the ice crystals grow, and then a rapid temperature drop occurs as the ice crystals cool. … A slow temperature drop occurs as ice crystalsRead More →

The problem with Sailor Moon Crystal is that it is getting distracting, because the series also has issues with the pacing and quality of its storytelling—which gives you a lot of downtime to criticize all of its visual flaws. What’s the point of Sailor Moon Crystal? The Crystal Points areRead More →

In orthorhombic crystal system, all axial (crystallographic) angles are identical. Is kno3 orthorhombic crystal system? Potassium nitrate has an orthorhombic crystal structure at room temperature, which transforms to a trigonal system at 129 °C (264 °F). What are seven crystal systems? In total there are seven crystal systems: triclinic, monoclinic,Read More →

UHD is not a “new” type of TV technology like QLED, but rather an improvement on the “full HD” 1080p LCD (liquid-crystal display) TVs. … A UHD TV operates like a QLED TV in that it has an LED backlight and LCD screen, but it lacks the QLED TV’s quantumRead More →

Meaning & Energy Green Aventurine provides strength, confidence, courage, and happiness. It renews one’s optimism for life and pushes us to take action to acquire what we want in this world. This stone urges one to get out of their comfort zone and take on new opportunities. Is aventurine naturalRead More →