Questions tagged [solid-state-chemistry]
Study of chemical species that are in solid phase, either in cases of their properties, or about ways of synthesizing them.
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Why do different impurities create different colors in diamonds?
Traces of nitrogen make diamonds yellow while traces of boron make them blue. What accounts for the differences in color for a given element?
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Is there a compound where one element has a CCP structure with all voids occupied by others?
My Google-fu hasn't got me anywhere. All results have been quite fuzzy about it, nothing explicit.
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How to solidify sand
I'm doing a research project where we analyzing the structure of sand after a certain process. To get a better idea of the internal structure of the sand, we use different colors to visualize the ...
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How do scientists check which kind of unit cell is present in a crystal?
There are many types of unit cells like:
Tetragonal Monoclinic Orthorhombic Rhombohedral
Hexagonal Triclinic Cubic
But how do scientists identify the type when a ...
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How do people check the type of defect in a crystal?
There are many types of defects like
Vacancy
Interstitial
Schottky
Frenkel
Non-Stoichiometric
Alien Impurities
But given a sample, how do scientists know which kind of defect is present in it [...
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What is the length of a unit cell of CuCl assuming that it is fcc?
The density of $\ce{CuCl}$ is given – $x\ \mathrm{g/cm^3}$
The crystal structure is assumed to be fcc.
My teacher is claiming the we can apply the formula
$$\rho=\frac{Z \cdot M}{a^3 \cdot N_\mathrm ...
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Structure of diamond
"diamond structure. Every carbon atom is bonded
to four other carbon atoms forming a three-dimensional lattice of chair conformations."
SENTENCE FROM A BOOK
What does this mean?
Where I am struck ...
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What are Lattice Points?
What are lattice points exactly? For what purpose are they used in solid state chemistry?
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What causes photovoltaic (solar) cells to degrade?
Photovoltaic panels can have 20 or 25 year underwritten warranties with a guaranteed remaining efficiency of 80 % of the new panel. That means, that photovoltaic panels seem to degrade somehow.
Why ...
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Solid salts of hydronium ion
Are there any solids with hydronium ion in its crystal structure?
If so, what are they?
If not, why not? I understand there are hydroxide-containing solids and gels such as aluminium hydroxide but ...
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How does the crystal know where to stop stacking the unit cells?
I tried to make different crystals in the cubic system by stacking cubes in a 3D software. However, I need to tell the software where to skip rows or stop stacking the unit cells in a specific ...
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Total number of octahedral void(s) per atom in a cubic closed pack structure
The total number of octahedral void(s) per atom present in a cubic closed pack structure is
(a) 1
(b) 2
(c) 3
(d) 4
I answered with (d), but the key on internet says it is (a). Please clarify the ...
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About the nomenclature: manganate or manganite?
I am a bit confused about the correct name of $\mathrm{LaMnO}_3$. Is it lanthanium manganate or lanthanum manganite?
I was assuming that since $\mathrm{SrTiO}_3$ is called strontium titanate, $\...
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State of aggregation of "ate" complexes
I understand that ate complexes can result from the addition of carbanions to neutral aluminum alkyls.
I was wondering what the balanced equation for this reaction is/what the structure would be in ...
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Why there exist no void with co-ordination number 5
Here
oh = octahedral
td = tetrahedral
CN = co-ordination number
My problem is that, that why it is not possible to have a void with CN =...
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What is the minimum distance of Rubidium and Iod ions in a centered cube?
I have a problem to visualize the following assignment:
What is the minimum distance between $\ce{Rb^+}$ and $\ce{I^-}$ ions if radius of $\ce{Rb^+}$ is ${1.49\cdot10^{-10}}~\mathrm{m}$ and radius ...
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Boyle's Law of pressure and volume
Boyle's Law states that pressure is inversely proportional to volume.
However, let's take an example of a balloon: as we fill air in it, its pressure increases, but its volume also increases. Can ...
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What is the (conceptual) difference between binding energy and adsorption energy?
I know the equations, but I have some difficulty getting the difference between the two concepts of binding energy and adsorption energy.
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Why do amorphous substances have different values of physical properties in different directions?
Today my teacher taught about amorphous and crystalline substances. Crystalline substances are said to have different values for physical properties (like speed of light, electrical resistance, etc) ...
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How are non-Stoichiometric compounds determined?
For solids where the compound contains defects, the stoichiometric equation deviates from the "pure" one. How are these compounds determined? I am looking in my chemistry book but I do not see ...
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How to determine whether a compound is gas or liquid or solid? [closed]
My book says, methyl chloride, methyl bromide, ethyl chloride and some cholorofluromethanes are gases at room temperature, whereas higher members are liquids or solids. Why?
With this question, I ...
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Why polymorphs form?
We always hear about the different arrangements of molecules that lead to the formation of polymorphs, my question here is why would a polymorph form in the first place? The material was given enough ...
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Solvated solids
I have a very basic question concerning solvation. If a solid (solute) was dissolved in a liquid (solvent), is the solute still in the solid state? or does it convert into another state of matter when ...
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Stoichiometric defects in silver bromide
Stoichiometric defects (Schottky and Frenkel defects) in ionic crystals are formed due to irregularities in the ionic arrangement which maintain the stoichiometry and electroneutrality of the solid. ...
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What is the principle of diffuse reflectance spectroscopy behind band gap measurement?
As the title suggest can you explain how DRS can be used for finding band gap of a material. Below is an DRS output result:
From the figure we can see that at about 465 nm the reflectance drops ...
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Thermodynamics behind Deliquescence?
The phenomenon of deliquescence wherein a water soluble substance absorbs water from atmosphere and dissolve in it forming a saturated solution, has thermodynamic roots. I have read the fact that the ...
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What is the structure of N₅P₃?
What is the structure of the molecule $\ce{N5P3}$? $\ce{N5P3}$ is not documented online, so could anyone please comment on the structure of the molecule:
How many ligands does each phosphorous atom ...
user2117
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Removing titanium from tantalum crucible
I'm trying to remove titanium filling from a tantalum crucible for a high-temperature effusion cell. I've managed to get a majority of the material out with tweezers, but some remains and is ...
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Confusion in unit cells of crystal system
Unit cells are divided into two main types
Primitive
Non-primitive
Primitive includes simple cubic lattice whereas non-primitive includes fcc bcc end centered..
Among the seven types of crystal ...
user1811
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What is the difference between a chemical state and just a combination?
I don't think a combination also can be called a "state" i.e. that the chemical state of vapour or solid would be just a combination. When I read Wikipedia about "chemical state" it refers to just a ...
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Are chiral quasicrystals possible?
Quasicrystals are materials that have long-range atomic order but lack the translational symmetry of conventional crystals. All quasicrystalline tilings and packings I have read about thus far, whilst ...
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Ionic Radius of Iodine in High Temperature Form
The ionic radius of iodine in the high temperature form can be determined once the unit cell is known, but how can I calculate the radius of $\ce{I}$ given that the cubic lattice parameter is 6.10 Å.
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Why does an ideal capacitor give rise to a rectangular cyclic voltammogram (CV)?
This question is sort of a sequel to my previous question about cyclic voltammetry (CV). One of the responses made reference to the fact that an ideal capacitor gives rise to a rectangular cyclic ...
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How to find the band gap for a compound?
I have processed a si/polymer hybrid using a silane coupling agent which I need to determine the energy gap / band gap. Would you please let me know the procedure to go about determining the band gap?...
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Has QTPIE ever been applied to 1D metals such as polyacetylene?
QTPIE is a fluctuating charge model that substantially improves modeling of polarization and charge transfer. I was curious whether it has ever been applied to 1D metals such as polyacetylene to ...
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Why are there no edge dislocations in a face-centered cubic (FCC) lattice?
In crystallography, we know that the Burgers vector is parallel to the dislocation direction in a screw dislocation, and perpendicular in a edge dislocation.
Furthermore, I have in my lecture notes "...
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How are turbostratic graphite phases formed?
Turbostratic graphite is graphite in which there is quenched rotational disalignment between adjacent graphene sheets, i.e. one sheet is rotated with respect to its neighbor. I suppose this could be ...
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Is there a theory behind selecting elements that may be successful in potential superconductors?
Looking at something like $\ce{YBa2Cu3O7}$ which was one of the first cuprate superconductors to be discovered, I'm always curious how the selection of these substances as likely superconductors comes ...
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Are there any ionic amorphous solids?
This question on NaCl crystalization actually got me wondering: are there any ionic amorphous solids? Like ionic crystals are crystalline materials of electrostatically-attracted ions, can ions form ...
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How does NaCl maintain its crystalline structure?
My understanding is that $\mathrm{NaCl}$ is an ionic compound, in which $\mathrm{Cl}$ becomes (effectively) $\mathrm{Cl^-}$ and $\mathrm{Na}$ becomes $\mathrm{Na^+}$. So I understand why I would get a ...
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