Questions tagged [diamond]

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1answer
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Why does diamond's specific heat capacity deviate from the Dulong-Petit theory at room temperatures? [closed]

Why does diamond deviate from the prediction of $c_v = 3k_B$ at room temperature more than other solids. Why do we require Debye's theory instead?
-1
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1answer
43 views

How many atoms are in the primitive unit cell for diamond?

The primitive unit cell for diamond is pictured (the parallelepiped inside the cube). How many atoms are in the unit cell? My first guess is 3.5 and i know this must be wrong as the number of atoms in ...
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0answers
20 views

Band formation in diamond

Why is it that in the band diagram of diamond does the sp3 hybridised orbital split into two forming valence band and conduction band? I thought that these sp3 hybridised orbital forms 4n bonding and ...
0
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1answer
50 views

How could skin be made as hard as diamond or graphene, whilst retaining it's current flexibility? [closed]

I want to understand what exactly the difference is between skin, on a molecular, atomic and quantum level, and materials like diamond and graphene. Then I wish to understand the changes that would ...
4
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1answer
67 views

Is there a theoretical upper limit for how hard something can be? Harder than diamonds?

Is there a theoretical upper limit for how hard something can be under "normal circumstances" (i.e., on the surface of Earth or similar or in the empty space)? Something like absolute zero/infinity on ...
1
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0answers
61 views

Why are diamonds formed under high pressure? (use entropy)

My book asks how can diamond ever be more stable than graphite, when it has less entropy. I have to explain how at high pressures the conversion of graphite to diamond can increase the total entropy ...
-1
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1answer
245 views

What does diamond have besides graphite?

I know that diamonds are made of carbon atoms and graphite is made of carbon atoms too. The structure of both is also different. But do diamonds have any material or structure besides carbon to make ...
1
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1answer
152 views

Diamond and UV light

In the paper Characteristics of 2-photon ultraviolet laser etching of diamond. RP Mildren et al. Opt. Mater. Express 1, 576 (2011), I found out that UV light cause the atom ejection from the ...
1
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1answer
68 views

What does the phrase “atom-like system” refer to?

In several papers and contexts I've seen this phrases like this used: The nitrogen-vacancy in diamond is an atom-like system in the solid state. What does "atom like system" mean exactly? I've ...
0
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1answer
25 views

Looking inside a diamond film plate at the nanoscale

What is the best microscope or other analytical tool for detecting the presence of nano-graphite inside of single crystal diamond film? It would be good to have a 3D map of the nano-graphite, too. ...
1
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0answers
332 views

How to calculate the resonance peak of a NV center during a ESR/ODMR measurement?

I am thinking of making an magnetometer with ODMR measurement of a NV center in nanodiamond. But before I do the experiment, I want to estimate the sensitivity of my experiment beforehand ...
1
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4answers
3k views

Can you compress pure carbon into diamonds?

I'm doing a science project, and we're wondering if it is possible to compress pure carbon (C) to the point where it becomes diamonds? What would the process have to be and how much energy would this ...
3
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0answers
136 views

Diamonds are not forever?

It is frequently stated that although graphite is the more stable allotrope of carbon at STP, the activation energy of the diamond-to-graphite transformation is so high that our diamonds will never ...
0
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1answer
113 views

Might a diamond with impurities (doped) be less brittle than a pure diamond?

Diamonds are extremely hard (resistant to pressure) but quite brittle (susceptible to shock). Sufficient impurity will compromise hardness, but I am finding it difficult to find out the effect on ...
1
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2answers
231 views

Is possible to synthesize diamond at relatively lower pressures (6 to 7 GPa vs 12 GPa)?

Pure binderless nanopolycrystalline diamond can be produced from graphite when the graphite is treated with more than 12 GPa pressure and at least 2100°C temperature . If we treated graphite or ...
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2answers
237 views

Crystal field in diamond

The crystal field effect occurs in ionic crystals and causes a splitting of the magnetic quantum levels of the cation. The magnitude of the splitting may be roughly computed by obtaining the potential ...
6
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2answers
60k views

Will a diamond break if I hit it with a hammer [closed]

I was having this discussion with my friend about the hardness of diamonds. I would like to know if a diamond will break or not if hit with a hammer. Different sources across the internet mention ...
3
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1answer
280 views

Can a strained diamond actually become conductive?

According to about.com, "The electrical resistivity of most diamonds is on the order of 1011 to 1018 Ω·m" (source) However, according to the diamond band diagram, it seems that under a certain ...
22
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2answers
4k views

Melting diamond and cool down as diamond

Is it possible to melt diamond? And if possible while let it cool will it became diamond again?
9
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2answers
648 views

Why doesn't diamond glow when hot?

In an answer to this SE question, the respondent explains that heating a perfect diamond will not cause it to glow with thermal blackbody radiation. I don't quite follow his explanation. I think it ...
1
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1answer
18k views

X-ray imaging and diamond

Why doesn't diamond show up in X-ray imaging? Diamond is the hardest substance ever known, and as we know, X-ray radiation is produced when a cathode ray of high frequency hits a very high atomic mass ...