Table of Contents
Is germanium a lattice?
nglos324 – germanium. Germanium is a semiconductor in group IVA of the periodic table. … Germanium has the diamond cubic crystal structure shown, an fcc lattice with a basis of two germanium atoms, one at (0,0,0) and the other at (1/4, 1/4, 1/4) in units of the cube edge.
What is the lattice constant of germanium at 300 K?
Basic Parameters at 300 K
|Effective hole masses mlp||0.043mo|
|Electron affinity||4.0 eV|
|Lattice constant||5.658 A|
|Optical phonon energy||0.037 eV|
How do you find the lattice constant?
Calculate the lattice constant, a, of the cubic unit cell. If the space lattice is SC, the lattice constant is given by the formula a = [2 x r]. For example, the lattice constant of the SC-crystallized polonium is [2 x 0.167 nm], or 0.334 nm.
What is lattice parameter of FCC?
The lattice parameter is 0.3571 nm for FCC iron and 0.2866 nm for BCC iron.
How is germanium mined?
Germanium is primarily mined with zinc ore as well as with argyrodite, germanite, and coal according to the Los Alamos National Laboratory.
Is germanium magnetic?
Abstract. The magnetic susceptibility of highly doped germanium has been measured between 300K and 1.3K. The contribution of the carriers to the susceptibility has been derived from the data.
What is the density of germanium?
around 5.5 g/cm3 Germanium was discovered by Clemens A. Winkler at Freiberg, Germany, in 1886. Its existence had been predicted by Mendeleev who predicted its atomic weight would be about 71 and that its density around 5.5 g/cm3.
What is refractive index of germanium?
Germanium is a chemical element with the symbol Ge and atomic number 32. It is a lustrous, hard, grayish-white metalloid in the carbon group, chemically similar to its group neighbors tin and silicon. For a typical sample of Ge the refractive index and extinction coefficient at 632.8 nm are 5.47661 and 0.7842102.
What is the dielectric constant of silicon?
11.70.2 The dielectric constant of silicon (at 1 Mc/sec) was taken to be 11.70.2, of germanium 15.80.2.
How do you find the lattice constant from D spacing?
What is lattice constant in semiconductor?
We can define lattice constant as the physical dimension of unit cells within a crystal lattice simply, it is the side length of the cube.
WHAT IS D spacing in XRD?
The d-spacing or the lattice spacing or inter-atomic spacing is the distance between the parallel planes of atoms. It is the minimum distance between two planes.
What is lattice and lattice point?
A lattice point is a point at the intersection of two or more grid lines in a regularly spaced array of points, which is a point lattice. In a plane, point lattices can be constructed having unit cells in the shape of a square, rectangle, hexagon, and other shapes.
What is equilibrium lattice constant?
The equilibrium lattice constant a corresponds to the number density that gives the minimum of the () curve. The minimum of is also called the cohesive energy Ecoh . For DC silicon, a = 5.431 and Ecoh = 4.63 eV. … 1 Lattice energy of Si in different structures.
How do you know if its BCC or FCC?
The BCC unit cell consists of a net total of two atoms, the one in the center and eight eighths from the corners. In the FCC arrangement, again there are eight atoms at corners of the unit cell and one atom centered in each of the faces. The atom in the face is shared with the adjacent cell.
What is a germanium lens?
Germanium lenses are optical lenses made of polished germanium. These lenses are rugged and resistant to corrosion, and are ideal for harsh environments and applications where there is constant exposure to the elements.
What is the property of germanium?
Pure germanium is a hard, lustrous, gray-white, brittle metalloid. It has a diamondlike crystalline structure and it is similar in chemical and physical properties to silicon. Germanium is stable in air and water, and is unaffected by alkalis and acids, except nitric acid.
What are 3 uses for germanium?
Germanium is used to manufacture rectifiers, transistors and weapons-sighting systems and used as a fluorescent material. Alloying agent. Germanium can also be used as a catalyst to produce plastics.
Is antimony a metal?
Although antimony resembles a metal it has poor electircal and conductive properties and does not react chemically like a metal and is classified as semi-metallic. Antimony ores are mined and then mixed with other metals to form antimony alloys or combined with oxygen to form antimony oxide.
What is germanium made of?
germanium (Ge), a chemical element between silicon and tin in Group 14 (IVa) of the periodic table, a silvery-gray metalloid, intermediate in properties between the metals and the nonmetals.
What is the 28th element?
Nickel – Element information, properties and uses Periodic Table.
How do you find density of germanium?
Density of Germanium is 5.323g/cm3. In words, the density () of a substance is the total mass (m) of that substance divided by the total volume (V) occupied by that substance. The standard SI unit is kilograms per cubic meter (kg/m3).
What is the reactivity of germanium?
Reaction of germanium with air It is more reactive than silicon, which is immediately above germanium in the periodic table, but not by much. At red heat, germanium reacts with oxygen in air to from germanium dioxide.
What is the refractive index for air?
Some representative refractive indices
|Name of Material||(nm)||refractive index no. n|
What is the refractive index of diamond?
2.42 Refractive index of diamonds is 2.42.
What is the highest refractive index?
The highest refractive index is of Diamond with its value 2.42.
- Refractive index of glass is 1.5.
- Refractive index of water is 1.33.
- Refractive index of ruby is 1.77.
Is germanium a dielectric?
Germanium is transparent to infrared radiation and presents an extremely high dielectric constant. Germanium is transparent to infrared radiation and presents an extremely high dielectric constant (e=16). That makes it the best material to produce a high contrast PBG.
What is value of epsilon?
Value of Permittivity of Free Space: The value of epsilon naught 0 is 8.854187817 10.F.m (In SI Unit), where the unit is farads per meter.
Why is Silicon called germanium?
Silicon-germanium is an important material that is used for the fabrication of SiGe heterojunction bipolar transistors and strained Si metal-oxide-semiconductor (MOS) transistors for advanced complementary metal-oxide-semiconductor (CMOS) and BiCMOS (bipolar CMOS) technologies.