Planar packing fraction (factor) for the face centred cubic (111) plane

In this video, Parisa works through the calculation of the planar packing fraction, or factor (PPF) for the (111) plane of the face centred cubic (FCC) crystal structure.

[@emfournet]

Speaking from the future... Thank you so much, I just don't get how you're so much more lucid than some of the folks who've been doing it for 1,000,000 years

[@Moakmeister]

This belongs in an unintentional ASMR playlist.

[@abdallababikir4473]

lmao

[@marcelgyasi4935]

You knowwwww😂😂😂

[@alexcrack5442]

For a plane 111, the area of plane in terms of a side is: (a^2)(3^1/2)/2

[@sora_is_my_dad420]

Bravo! Thank you so much. I was calculating the PPF of FCC but I didn't know there were different planar densities (??). Because if you just google this it says 74%, but using different models we get this 111 version. Thank you again!

[@rachelharris1107]

74% is the atomic packing factor of FCC, the unit cell as a whole, but planar density depends on the crystallographic plane you are looking at inside the unit cell.

[@rheymaalam2759]

shouldnt it be b*h instead of 1/2 b*h since the unit is rhumbohedral?

[@anjishnupurkait2918]

thanks for this 🙏🏻

[@shivajishinde1496]

Can you please eloborate about the 1/6 th portion of an atom?

[@UmmadiRaviteja]

The (111) plane in the unit cell forms an equilateral triangle with an angle 60 degrees at each corner. Here the atom at corner is a circle with 360 degrees. hence the part of the atom at the corner within a unit cell is 60/360=1/6.

[@avadheshsingh492]

@@UmmadiRaviteja thanks man

[@ballusarkar6226]

Mam your teaching was very very nice

[@phy_mr]

Thank you

[@hazymine4485]

How can I get a schoolarship to university of Toronto?

[@hamzashokry4878]

Is it the most packed plane ?

[@alial3mri87]

I fall in love with the area of the square

[@robertomathiassusin4889]

Parabéns! muito esclarecedor!!!

[@technicalmicrofar4679]

Does she have her own channel?

[@user-dk4kj2jd5g]

Good job ms.

[@sanghprieysiddharth8414]

thanks mam please aplode more vedio

[@engmohammed2064]

you've done i great job ... keep it up :)

[@williamcastiblanco6193]

no comprendo muy bien el ingles, pero he entendido. muchas gracias por el video.

[@prajitvishnukarthik8886]

How it is (3×1/6) of Atoms???????

[@sladeartermiz]

i cant tell that the plane cuts 1/3 of the atom at the corner. how can you tell?

[@beigealert4268]

+sladeartermiz because the triangle that is formed is equilateral, each corner of it is 60 degrees. It actually cuts out 3x60 degree chunks which is 180 degrees. which is HALF of a full atom.

[@lailajmeel8661]

James Watson useful ,,thanks

[@Engrmfaisal]

Love u as well ur lecture

[@15PinkDiamonds]

wait isnt the area formula you used only good for half of the triangle because of b*h*1/2

[@stanleylim4458]

triangle is half a square bro

[@Parameswar_Ghosal]

Thank you very much mam...............

[@shivajishinde1496]

This is the formula you've used for planar density and not for the PPF. Please explain it.

[@21.sudhansusekharsahu71]

what is the planner packing factor and what is planner density ?

[@UmmadiRaviteja]

both are same.

[@bor2683]

Planar Packing Factor is (area of the plane covered by atoms)/(total area of the plane).
Planar Density is (number of atoms centered on plane)/(total area of plane).

[@ascesium]

how to calculate PPF for 222 plane

[@oluwaferanmi100]

Same as (111) plane

[@jasad8802]

Thanks ❤

[@echo7232]

How we can calculate Diamond 111 PPF??

[@maXmsROY]

Refer google

[@adisugirma3451]

thanks!

[@spingharkarimi9962]

please make a video from miller indices .

[@abbasnasir9108]

how there are 4 atoms in the base?
pls comment

[@MissHorton007]

There are not 4 atoms in the base, the length is 4 radii. One radius for each sphere on the edge and 2 radii for the sphere in the center.

[@gauravanand6937]

Got it. Thanks.

[@AfroDanceWithZeAmazingBreezy]

perfecto.. thanks thanks thanks

[@ployat]

is this the same as planar density?

[@zhengnian]

+Tommy Field yes

[@free9779]

No

[@igotmail56]

you only used half the triangle of your plane...so your area should be double.

[@yogendersingh3588]

you are awesome

[@ramonandrade2624]

obrigado

[@Alberto22219]

Gracias :D!

[@imranlone9544]

YOU ARE { BREATHTAKING }....

[@loke1461]

I love you (I mean the subject)

[@abdullahiahmedmohamed3925]

hhhhhhhhhhh

[@marianatargino2858]

🇧🇷🇧🇷🇧🇷🇧🇷🇧🇷

[@danielroisman7136]

🇦🇷

[@ammar3094]

I skip all my materials classes and teach myself because the guy can't teach, but if you were my professor i'd show up to every class. Hot and can teach, nothing else someone can ask for.

[@Newbport849]

Nerd.

[@ammar3094]

@@Newbport849 I wish, nerds coming out on top nowadays and would make things lot easier career wise.

[@rationalthinker9612]

I was thinking the same thing, she's hot

[@RohitSingh-pq8ss]

Have you been in a zombie movie🙄🙄..bad handwriting..02:25 how can we say ..not cleared

[@DR-8595]

what will be class if u have so pretty maam....no flirting

[@user-xv3ml7xn8x]

You didn't explain well madam!! Pls try to write clearly over board

[@inshalnaeem9396]

thank you