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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Surface-dependency of kinetic in speed law?
we can comprehend the quantitative dependency of the kinetic of a chemical reaction through the speed law: $v(t) = k \cdot c(...)^k \cdot c(...)^n$
Here I used the concentration $c$ for that take ...
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Distance between two atoms that lie along a body diagonal
It is given that two atoms lie along the body diagonal of a unit cell (crystalline solid). The length of such cubic cell is $a=\mathrm{0.336\,nm}$. My book says that we should take the coordinates of ...
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Interstitial Sites in unit cell
I wanted to calculate how many interstitial sites (tetrahedral and octahedral) are present in a simple unit cell and their location and radius.
I am guessing they are at the center of unit cell and at ...
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What are the physical properties of exotic ice?
This chart shows the phases of water that form at various combinations of pressures and temperatures.
It has multiple exotic forms of ice (labeled II through XV) listed. What are the physical ...
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How dangerous are non-soluble trivalent thallium compounds?
I am PhD student in solid state physics. I have been working with a fine powder of a transition metal oxide containing trivalent thallium. The oxide is not soluble in water.
In my university, ...
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Reason for isotropy in amorphous substances
I'd be thankful if someone explains why amorphous substances are said to be isotropic and crystalline substances anisotropic
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Primitive cells and their variations
Is there any intuitive way(without involving higher maths) to explain possible variations in seven primitive types of (unit)cells? I would like explanation in context of why end centred is possible ...
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Schottky Defect in AB2 type crystals
Are there any examples of Schottky defect in ${\ce{AB_2}} $ type crystals.
Does Schottky defect require that the cation and anion be of equal size?
According to me it is not necessary that the two ...
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Drying Li2CO3 without vaccum
I am looking for drying Li2CO3 without a vacuum oven, simply because we do not have one.
I did not find anything in the literature, or I am overthinking it? Just 100 °C overnight in a normal oven, and ...
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The existence of anti-phase boundaries (APBs) in defective crystalline materials
The existence of anti-phase domain boundaries (APBs) in polycrystalline materials is usually established by electron microscopic techniques (SEM/TEM) [1] and is also discussed in diffraction data ...
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What is the net gain of charge carriers in a semiconductor if an atom is removed?
In pure germanium, all Ge atoms are bonded with a tetrahedral geometry. It has a band gap and is a semiconductor. If we remove one Ge atom, what type(s) and how many charge carriers will be generated? ...
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why an interstitial defect increases density in covalent solids and do not increases in ionic solid?
The interstitial point defect increases the density of a solid. Frenkel defect is also a type of this defect but it do not increases the density.
Also, the mass / volume concept of density tells us ...
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Restoring potential of atoms in a solid
Above $\pu{0 K}$ the atoms in a solid are vibrating. However, what kind of potential restores each atom in the starting position?
Consider the crystal lattice of NaCl. The potential energy of a $\ce{...
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Balancing a chemical reaction with oxidation numbers
We have been teached how to balance chemical reactions with oxidation numbers in school, but somehow I can't understand it.
This is the equation to balance
$$\ce{Cu(s) + NO3−(aq) + H+(aq) -> Cu^2+(...
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Why Lambert's law does not hold for photoresistors?
Why don't photoresistors made of Si obey Lambert's cosine law? Is it related to the dark current of the photoresistor? I couldn't find any solution while searching the web.
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Determine anion radius in FCC cell
The edge length of an FCC cell is $\pu{508 pm}$. If radius of cation is $\pu{110 pm}$, the radius of anion is?
My approach:
$$(2R_{\text{cation}}+2R_{\text{anion}})^2=2a^2$$
Which on simplification ...
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Why do we have to use octahedral voids for formula making in solid state chemistry?
Allow me to take an example to explain myself.
Q) What is the formula of a compound in which the element Y forms a ccp lattice and an atom of X occupy ${1\over3}$rd of tetrahedral voids?
Now to find ...
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Unit cell of hcp structure
It is given in my book that the structure in figure-1 is the unit cell of hcp structure.
So why then is the structure in figure-2 not the unit cell as we can repeat the structure in figure-2 to get ...
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How many types of 3D packing are possible?
In my book it's said that there are 3 types of unit cubic cell - primitive , face and body centered . But for 3d packing types they have only mentioned FCC and HCP . I know that these 2 concepts- ...
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Interatomic spacing vs electric conductivity
I have a theory which may be wrong but I will write it down.If 2 elements at the same group (in solids)have the same crystal structure then the one with the biggest interatomic spacing has better ...
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"e and a" as combinations of pi bonds
I am trying to get a better intuition on solid-state physics but I am a chemist by degree. I came across this article that attempts to bridge the gap between solid-state physics and molecular ...
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How can fluorite structure exist?
From the information from Google the radius of $\ce{Ca^2+}$ cation is $100 \,\pu{pm}$ and of $\ce{F-}$ anion is $132\, \pu{pm}$, so essentially $\ce{F-}$ ion should form the Bravais lattice (FCC/CCP) ...
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Violation of Fajans' rule
According to Fajans' rules, greater charge in an ionic compound results in more covalent character. But why is it that sodium oxide is more covalent than magnesium oxide? Google says boiling point of ...
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How would the crystal structure of sodium stearate look like?
In my lessons of solid state, I was taught about Bravais Lattices, and Face Centered, Body Centered, and Primitive cubic lattices, to name a few. All these crystal structures had this assumption, that ...
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Synthesis of ZnO by wet chemical method and reducing particle size by ball milling
I synthesized bulk $\ce{ZnO}$ which is pure white in colour, but after high energy ball milling colour changes from white to yellow, why?
Figure 1: Zinc oxide (courtesy of Wikipedia).
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Please help regarding finding the correct approach {solid states}
In Diamond, carbon atom occupy FCC lattice points as well as alternate tetrahedral voids. If edge length of unit cell is 356 pm then diameter of carbon atom is ________?
I got the answer but is it ...
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what is meant by stability and potential energy of molecules in cases of formation of bonds?
molecules form chemical bonds in order to gain stability. it is said that forming bonds leads to lower potential energy of molecules and makes them stable. what does stability mean?
how formation of ...
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How Amorphous solids are converted to Crystalline?
I know about a process of Annealing where a crystalline solid is heated to its melting point and then cooled rapidly so as to form amorphous solid which has random crystallite in uts structure.
But ...
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