Crystallography

The branch of science that deals with the geometric description of crystals and their internal arrangement. (McGraw-Hill Dictionary of Scientific... | Contact experts in Crystallography to get answers

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Questions related to Crystallography

How to Interpret Rietveld Occupancy Values?

I have been doing some Rietveld calculations and been looking for an answer on some of the occupancy numbers. It there is one location for an element in the structure I understand the results but...

10 October 2016 8,904 7 View

Does any body have the cif file of beta-brass phase?

how can i find crystallographic information for beta-brass phase? note that, i can't found this cif on www.crystallography.net  thank you all

10 October 2016 3,650 0 View

Does anyone knows what kind of polyeder these copper and lead models represent?

I got them from a mineral collector, but obviously these are no crystal models.

10 October 2016 9,308 6 View

Does anyone knows what kind of polyeder these copper and lead models represent?

I got them from a mineral collector, but obviously these are no crystal models.

05 October 2016 8,869 5 View

My rocking curve for a thin film contains two peaks. Why?

One peak is broad, the other is narrow. Both are centered on the same angle and the broad peak is more intense. Thanks in advance for your help.

01 October 2016 1,858 3 View

How to calculate lattice spacing in TEM images?

We have some TEM images of some Pd nanoparicles. We can see the lattice of these Pd nanopaticles. Does anyone know how to calculate the lattice spacing of these Pd nanoparticles? It should be...

11 September 2016 9,151 12 View

Does orthorhombic space group Bbcb with a=b have 4-fold or 2-fold rotation symmetry?

I have one question about the lattice rotation symmetry. For example, Sr3Ru2O7 exhibits orthorhombic space group Bbcb but a=b. If a is not equal to b, it has 2-fold lattice rotation symmetry for...

09 September 2016 3,157 5 View

I have crystals, trying to tell if salt or protein before shooting them. The condition is 0.2M Ammonium Acetate, 0.1M Tris pH 8.5, 25% w/v PEG 3350?

Macromolecular Crystallography Used Hampton Research Screen, hit is in INDEX G9, trying to tell if the crystal is ammonium acetate or protein?

09 September 2016 3,829 5 View

Strange behaviour during cooling crystallization?

I am trying to crystallize a polyphenol called naringenin through cooling crystallization. I start by saturating a solution at 45 C and then I cool gradually (10 C/h) up to -5 C. Afterwards, the...

09 September 2016 8,342 12 View

How to calculate lattice spacing in TEM images?

We have some TEM images of some Pd nanoparicles. We can see the lattice of these Pd nanopaticles. Does anyone know how to calculate the lattice spacing of these Pd nanoparticles? It should be...

09 September 2016 756 11 View

How to solve the equation which is used to find Lattice parameters?

From literature survey, I am about to know the equation to find lattice parameters for hexaferrite. i.e. 1/d^2 = (4/3)*[(h^2 + hk + k^2) / a^2)] + (l^2 / c^2) But, How to solve this equation to...

09 September 2016 9,818 10 View

Why Liveplot GSAS Error?

I got error messages, "There was an error running the TCLDUMP....." when i was running liveplot on gsas with a material data., but when i used other material data (ZnS) with same procedure there...

09 September 2016 7,647 2 View

Is there any way to calculate CC1/2 from merged mtz file?

HKL2000, crystallography

09 September 2016 225 3 View

How to solve the equation which is used to find Lattice parameters?

From literature survey, I am about to know the equation to find lattice parameters for hexaferrite. i.e. 1/d^2 = (4/3)*[(h^2 + hk + k^2) / a^2)] + (l^2 / c^2) But, How to solve this equation to...

07 September 2016 2,331 9 View

How to estimate or calculate the crystallinity based on the Avrami equation

hello, everyone. How to estimate or calculate the crystallinity of an arbitrary heating progress based on the Avrami equation? thank you.

30 August 2016 6,969 3 View

How can we find Miller index in HRTEM image?

 I mean lattice plane (hkl),and direction [uvw].

27 August 2016 3,575 3 View

Is there any term which describes the "order of zones" like ZOLZ, FOLZ etc in reciprocal space?

Parallel planes in reciprocal lattice can be easily distinguished by terms like ZOLZ (zero order Laue zone), FOLZ (first order Laue zone) etc. Is there any therm which is equivalent in crystal...

25 August 2016 4,438 4 View

Can .ins file be generated from .res or .hkl source files?

I am in need of .ins files for my already solved crystal structures however the work folder only has .res, .cif and .hkl files. I have to develop crystallographic tables and am in need of .ins...

24 August 2016 4,764 5 View

How can we find Miller index in HRTEM image?

 I mean lattice plane (hkl),and direction [uvw].

08 August 2016 9,523 3 View

How to estimate or calculate the crystallinity based on the Avrami equation

hello, everyone. How to estimate or calculate the crystallinity of an arbitrary heating progress based on the Avrami equation? thank you.

08 August 2016 5,295 3 View

Can .ins file be generated from .res or .hkl source files?

I am in need of .ins files for my already solved crystal structures however the work folder only has .res, .cif and .hkl files. I have to develop crystallographic tables and am in need of .ins...

08 August 2016 4,470 4 View

Is there any term which describes the "order of zones" like ZOLZ, FOLZ etc in reciprocal space?

Parallel planes in reciprocal lattice can be easily distinguished by terms like ZOLZ (zero order Laue zone), FOLZ (first order Laue zone) etc. Is there any therm which is equivalent in crystal...

08 August 2016 8,979 5 View

Is there any proof that {210} of pyrite is really {210} and not sometimes also {120}?

It is well known that pyrite shows striations along . Although cubic but according to the point group symmetry m-3 the striation is commonly only visible along one of the on...

08 August 2016 2,394 17 View

How to calculate misorientation distribution?

I would like to compare the misorientation distribution obtained using CPFEM (Crystal Plasticity Finite Element Method) simulation with experimental results. I have calculted misorientation angles...

08 August 2016 6,306 3 View

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