"In this world of crystals and photons it’s all a game of probabilities, and the simplest way to increase the chance that a crystal will undergo sufficient reduction in the exposure is to make it bigger."
"X-ray crystallography is the science of determining the three-dimensional position of atoms in a crystal."
"The rate of cooling... A slow rate promotes the growth of fewer, but larger crystals."
"My name is Pietro Fontona, I'm a chemical engineer, and retired since 10 years. My hobby are crystals and crystal growth."
"A perfect crystal at zero Kelvin has zero entropy associated with it."
"For a perfect crystal at zero Kelvin, it has zero entropy."
"This is literally the first ever video of an actual space-time Crystal."
"He was a crystallographer, Dan. That means he studied the crystallization of minerals."
"Gout is going to be notated in your question as a negatively birefringent linear type of crystal."
"In the trigonal crystal system, you have three folds of symmetry."
"Once you know the unit cell, you could get the atomic radius."
"It's an infinite set of planes, equally spaced, and one should always be going through the origin."
"We're considering the gemstone to be not just an optical device, not just a geological specimen, but also a mineral or a crystal."
"This fluorite is renowned worldwide because of its amazing colours and crystal forms."
"There's an optimal thickness of the crystal that has to be considered."
"Interference figures appear when an anisotropic crystal is viewed in the back focal plane using a Bertrand lens."
"Observing interference figures provides information about the crystal habit: uniaxial or biaxial, and the length of the optic axis relative to the rest of the axes; it can be positive or negative."
"The Miller indices for this plane is one, one, and minus one."
"Families of planes are equivalent; they have the same packing density, environment, etc."
"We've learned about perfect crystals and now we've just gotten the single most important way to figure out which one we have."
"There's 230 space groups, that's the most specific way of defining how something can be periodic in three dimensions."
"The reciprocal lattice of body-centered cubic is face-centered cubic."
"We can represent a whole set of families of planes by just one point in the reciprocal lattice."
"Whenever we do microscopy to get crystallographic information about the sample, we should be able to get information about the crystal structures essentially from that diffraction pattern."
"The smallest portion of a crystal lattice that shows the three-dimensional pattern of the entire crystal is known as the unit cell."
"Grain boundary... accommodates the misalignment between two grains."
"You're sort of an explorer of the molecular world when you're a crystallographer."
"The crystallographic restriction theorem states that the only possible rotational symmetries of crystals that we can see in nature are twofold, three-fold, fourfold, or six-fold."
"Miller indices define families of lattice planes."
"All a crystal is, is a regular repeating pattern of something."
"This is only possible if the structure is FCC."
"This equation is really helpful in calculating the determining the crystallite size as well as the strain."
"Since many materials such as salts, metals, minerals, semiconductors, as well as organic, inorganic, and biological molecules form crystals, X-ray crystallography is very important."
"It's possible to simulate an entire crystal by repeating a single unit cell infinitely in all directions."
"The primitive cell and reciprocal space is called the Brillouin zone."
"The habit plane for martensite in titanium is close to 334 beta."
"Juan has a deep passion for correlated materials in crystallography."
"Two-dimensional electron crystallography has produced some of the very highest resolution protein structures that are known to date."
"We can use this x-ray diffraction studies to find out the information about the crystal system."
"The point group symmetry is 4 mm, now there is only one 4-fold axis and therefore this belongs to the tetragonal class."
"Gallium indium phosphide undergoes a particular ordering of atoms that leads to a change from a cubic F symmetry with point group bar 4 3m through a trigonal structure with a point group 3m."
"William Lawrence Bragg... determined the structure of a crystal using Laue's x-ray diffraction pattern."
"For such a lattice, this is called a simple cubic lattice where all distances between atoms are equal."
"If they knew crystallography, they'd know how to specify the shapes!"
"What you can do if you understand crystallography."
"The very definition of a crystal requires translational symmetry because the environment at every lattice point is exactly identical."
"There is long-range order in a crystal."
"The hexagonal close packed structure can be described as a lattice plus a motif consisting of two atoms."
"Nature prefers especially two of them... these are two important classes of close-packed structure."
"A crystal is a solid that has long-range periodicity; the atoms are arranged in a certain set pattern."
"The unit cell is the simplest unit that, if we reproduce it through all space, it generates the entire crystal without any overlaps or voids."
"Simple geometry tells you that the tangent of theta is equal to the burgers vector of the dislocation divided by the spacing."
"Crystallography is the determination of the atomic structure of a crystalline solid."
"There are a large number of Nobel Prizes that are related to crystallography work."
"The Bragg equation is satisfied if K - minus K is exactly equal to a reciprocal lattice vector."
"The crystal habit can usually be related to the crystal symmetry."
"We usually talk about a crystal when we have a material with a regular repeating structural order."
"What is that repeating motive that we were talking about in crystallography? We call it a unit cell."
"The handout on the space and plane groups is a useful tool for understanding crystallography."