Law of crystal symmetry | Solid State | Physical Chemistry

Download our Android app at goo.gl/5JM1G2
To Get New Videos on WhatsApp please fill the form at
goo.gl/forms/w...
“Every crystal shows various types of symmetry.”
“All crystals of the same substance possess the same elements of symmetry.”
When a crystal is rotated about its axis, it shows the same appearance it is known as crystal symmetry.
Various types of symmetry in a crystal is known as elements of symmetry.
Centre of Symmetry:It is defined as an imaginary point within the crystal such that any line passing through this point intersects the opposite face of the crystal at equal distances.
In other words, any line drawn through this point will intersect surface at equal distance in both the directions.
Plane of Symmetry:It is an imaginary plane which divides the crystal into two equal parts such that one is the mirror image of the other.
For example, regular cubic structure can have 9 planes of symmetry. Three planes of symmetry are parallel to the cube faces and six diagonal planes are passing through opposite cube edges.
Axis of Symmetry:Axis of symmetry is a line about which the crystal may be rotated such that it presents the same appearance more than once during the complete revolution through 360o.
If a crystal presents the same appearance ’n’ times in one complete revolution, the axis is said to be ’n’ fold symmetry.
E.g. the cubic crystal of NaCl has 13 axes of symmetry out of which 4 are threefold, 3 are fourfold and 6 are twofold.
For Details Visit
cepekmedia.co.nf
cepek.hol.es/
edmerls.66Ghz.com/
edmerls.tk/

[@lewismackenzie7484]

This has helped me understand symmetry much better, thank you

[@Edmerls]

Glad it helped!

[@sweetsncandys]

thank you so much......... tommorow is my university exam,,,,,,,it helped a lot

[@sammdc923]

very short and very sweet . Thanks Edmerls

[@shachisharma8908]

Literally such a helpful ○ne....!🌝❣👀💗🙌🤍

[@Edmerls]

Thanks

[@shachisharma8908]

@@Edmerls Aree thanks to mujhe bolna chaiye 😇

[@saleemarif8512]

@@shachisharma8908 thanks

[@taseenbegum4032]

Sir make videos for whole syllabus also make for physics too. ...please it's a request.....

[@prathvisingh8288]

Clear explanation. Thanks a lot!

[@brento2890]

Excellent explanation !

[@lohayanivaradarajan5836]

thanks very much sir...this cleared all my doubts

[@Edmerls]

You are most welcome

[@krishnagaderaju7914]

Thank u for good explanation sir

[@umarzaib3198]

U r the best

[@AllInOne-em5qu]

I'm out of word
Superb

[@hebahthephysicist9349]

thank you for the simple and elegant video.

[@Edmerls]

thanks

[@yatenderthakur3104]

Thanks a lot sirr

[@hansoloh7511]

thank you! it is a very good info.

[@rezatanzil3153]

well explained

[@soroushsadeqiyeh4059]

Great explanation. Thanks!

[@Edmerls]

Glad it was helpful!

[@umarzaib3198]

Thankx sir G

[@ojasvigupta5129]

Really really helpful 👍👍

[@Edmerls]

Glad to hear that!

[@achukb1106]

More videos based on basic crystallography pls....

[@CepekArts]

Please see more of my videos on crystallography... czcams.com/play/PL9AUXQTZw3SuoPwu8UFZq4zXiPEC-So6i.html

[@asmitatutorial1404]

Sir Plz make video on gaseous state

[@Edmerls]

Its all there.. czcams.com/play/PL9AUXQTZw3Ssp6Ne6_XbBu8TLuO7qEd4L.html

[@AsifShah-fi7oj]

Awesome

[@sujanvahora2134]

Thanks

[@achuu5231]

Thank you

[@krishnagaderaju7914]

Excellent sir

[@Baljeet-do9bl]

Thnku so much

[@Edmerls]

You are welcome Baljeet!

[@krishnagaderaju7914]

Superb sir

[@zeinabtoufaily8166]

Thank you so much

[@Edmerls]

Welcome

[@poojasutaria9471]

Thks

[@hajatar7913]

Can I have the ppt please

[@ar_007_ind]

This guy is confused in between group symmetry and crystal symmetry and its elements

[@dikshitchawla6499]

Why a crystal can't have a 5 fold symmetry

[@hebahthephysicist9349]

there is a long proof for that using the rotation matrix , but short answer is that "n" fold axis can happen when [ 1+ 2 cos(2*pi/n) ] is integer. that's why we can't have n=5,7,...

[@dikshitchawla6499]

@@hebahthephysicist9349 yeah I saw that later too in KL Kapoor's book too

[@guguhhhhuhhjj2883]

amazing video

[@a.praneetha1501]

thank you so much sir!

[@Edmerls]

So nice of you

[@RajeshKumar-oq1zg]

Sir solid state pr video send kare

[@Edmerls]

Please check my playlist on solid state at czcams.com/video/Pz-yaCYkHZI/video.html

[@Arjun-ev4et]

Simply awesome

[@Edmerls]

Thanks a lot 😊

[@goldon5909]

Fantastic 👍

[@Edmerls]

Thank you! Cheers!

[@chalakanibikshamaiah3333]

good animation

[@vikramkumarthakur3124]

Tnxxx alot sir
🙏🙏🙏🙏🙏🙏

[@Edmerls]

So nice of you

[@ansiiiburki]

❤😍

[@jayeshchoudhary3073]

How and where to submit whatsapp no. of mine for new videos

[@tabassumahmed2324]

nice voice

[@BC-yr6eg]

👍👍👍

[@rocktime8109]

Hi

[@navamiknair7200]

👏👏👏👏

[@karthikraja-pt5fq]

👍

[@tabassumahmed2324]

I want dibrugarh university syllabus

[@Edmerls]

Can you please send me the syllabus, I will try to make the playlist accordingly..

[@tabassumahmed2324]

Cepek Media where will I send?

[@Edmerls]

Please send it to [e-mail]

[@ramabadrancd4522]

Thank you