The crystals are bonded by plane faces `(f)` straight edges `(e)` and interfacial angle `(c)`. The relationship between these is `:`
A
`f+c=e+2`
B
`f+e=c+2`
C
`c+e=f+2`
D
none of these
Text Solution
Verified by Experts
The correct Answer is:
a
`f+c=e+2,` where `f` is plane face, `c` is interfacial angle and `e` is straight edges.
Topper's Solved these Questions
SOLID STATE
P BAHADUR|Exercise Exercise 9|1 Videos
MOCK TEST PAPER
P BAHADUR|Exercise Exercise|92 Videos
SURFACE CHEMISTRY
P BAHADUR|Exercise Exercise 5|1 Videos
Similar Questions
Explore conceptually related problems
Define bond length and bond energy and state the relationship between the two.
Number of crystal systems having, only 2 types of Bravais lattices = x, Number of crystal systems having, at least 2 interfacial angles equal = y, All the three interfacial angles and all the three axes lengths equal = z Then find y -(x +z) .
A metal crystallises in a face centred cubic structure. If the edge length of its cell is 'a' the closest approach between two atoms in metallic crystal will be
find the height of the regular pyramid with each edge measuring l cm. Also, (i) if alpha is angle between any edge and face not containing that edge, then prove that cosalpha=1/sqrt3 (ii) if beta is the between the two faces, then prove that cosbeta=1/3
Comprehesion-I Let k be the length of any edge of a regular tetrahedron (all edges are equal in length). The angle between a line and a plane is equal to the complement of the angle between the line and the normal to the plane whereas the angle between two plane is equal to the angle between the normals. Let O be the origin and A,B and C vertices with position vectors veca,vecb and vecc respectively of the regular tetrahedron. The angle between any edge and a face not containing the edge is
Comprehesion-I Let k be the length of any edge of a regular tetrahedron (all edges are equal in length). The angle between a line and a plane is equal to the complement of the angle between the line and the normal to the plane whereas the angle between two plane is equal to the angle between the normals. Let O be the origin and A,B and C vertices with position vectors veca,vecb and vecc respectively of the regular tetrahedron. The angle between any two faces is
