"TAZAWA.EXE" was made in order to support the identification of minerals from Powder X-ray Diffraction (XRD) Charts, and programed in Quick-BASIC 4.5.
It is effective only between 2 and 40 degrees in the condition of Cu-K Alpha..
It is workable in DOS,

"TAZAWA.EXE" has "d-spacing mode useful for other wavelengths without Cu-K Alpha, by inputing d-spacing.
It is a kind of free software. Junichi ISHIKAWA doesn't take any responsibility of any result of your using it.

Click the following blue TAZAWA.EXE to download the software. It has almost 110kb.



Make a folder (ex. named "TAZAWA"). and copy TAZAWA.EXE and COMMAND.COM into it.
Make a DOS window (US-mode).

And enter "tazawa" after DOS prompt.

You see the following message.


If the data file "X.txt" is in the folder, enter 1 to replace data, enter 2 to add data,
enter 3 to finish the software in emaegency.
Enter 2 generally.

Enter sample name after "Sample name=?".
In this example, sample name is "A-123"

Enter angele (degree) after "2theta=?".
And enterheught after "height=?"
The unit is not sprcific.

Enter angles and heights about every peaks. The order is flexible.

If you'd like to enter d-soacing rather than 2theta, enter -1 after "2theta=?"
The mode would change and you can enter d-spacing (angstrom) after "d-spacing=?"

If you enter -1 after "d-spacing?" again, the mode would change back.

If you finished entering the data of every peaks, push only Enter key, or enter 0, after "2theta=?" or "d-spacing=?".
Even if you didn't finish the entering, you can try pre-analysis and to continue to enter data.

Sample name, d-spacing, 2theta and relative intensities appear (sky blue).
And also mineral names (yellow).
Confirm them.

Mineral names are generally outputed in the order : quartz - feldspars - silica minerals without quartz - clay minerals -zeolites -others.

This figure is the example of the sample to contain only quartz and chlorite.

For example, "26.6>20.8 after Quartz" means that the height of 26.6 deg. is higher than that of 20.8 deg. peak on Cu-K alpha. "36.4-39.4" means that the peak of 36.4 deg. has almost same or unknown height as the peak of 39.4 deg.

Please mark each peaks according to the data in the monitor.
It is impossible to guess kinds of mineral about the peaks without any mark, and higher peaks than the expectations.
 The minerals with "?" mean some possibilities of their existence.

Enter 1 to change to another chart.

Enter 3 to finish this program.

Do not enter 2 ! ( Sorry, this program would stop by some bug)

The next screen will appear after you enter 3.
And please enter 1 to save tha data as "X.txt"

Enter 2 to change the file name. However the program will stop if there is same file name. Pay attention to that.
The following example is the situation to make a file named akaishi.txt.

Please enter "exit" to finish DOS.

The next screen is an example of "X.txt".


The prdinal tolerance is 0.26deg.. ( It is more in the case of clay minerals.)
Unrelated minerals may be outputed if there are too many peaks.

The limitation of output is as follows.
Albite is not distinguished from plagioclase if it is very few.

The tallest peak of alpha-cristobalite averlaps a peak of olagioclase.
Therefore alpha-cristobalite may not be outputed if it is few.

And also, following combinations restrict to output minerals names.
tridymite-quartz-feldspar, epidote-laumontite
montmorillonite-chlorite, alunite-chlorite
serprntinite-kaolin minerals, kaolin minerals-chlorite
halloysite-kaolin minerals, analcime-yugawarite
pyrite-aragonite/amphibole, dolomite-alunite-feldspars

Mineral names are concidered about paragenesis

The exact mineral names may not be outputed about K-feldspars, kaolin minerals and amphiboles etc.

1) American Society for Testing Materials (1941-) X-ray powder data file


*iphone アプリ 開発