# Tabular processor for X-ray diffractometry

## Introduction

The program RTP is intended for the specialists in the area of X-ray analysis of crystal materials in various directions of science and technology. It allows to calculate the crystal lattice parameters (lattice constants) for syngonies from cubic to triclinic and also allows to calculate the reflexes positions for known parameters and diffraction indices. In addition, it has an indexing feature — determination the indices using shuffle technique for lattices up to monoclinic with unknown parameters, if the assumptions of lattice type and possible limits on indices and parameters do exist.

## Technical characteristics

- Calculated lattice types: from cubic to triclinic.
- Calculated data: lattice constants and cell volume;
*c/a* relation for hexagonal, tetragonal and orthorhombic lattice; orthorhombic splitting.
- Limits by indices
*h k l*: from 0 to 99
- Limits by interplanar distances: 0.02...99 Å
- Limits by lattice edges
*a*, *b*, *c*: 2...99 Å
- Maximum line number in the table: 440
- Precise of calculation parameters: 0.0001 (0.00001) Å
- Label the part of lines in the table as a separate phase (up to 4 phases).
- Calculation the reflexes with generation of
*h k l* by given parameters and lattice type.
- Calculation the reflexes by given parameters and indices
*h k l* in the table.
- Indexing using shuffle technique and by the bearing indices.
- Import of PDF cards, which are written from PCPDFWIN program (from PDF-2 software kit).
- Export the table in format for the phase search program PCSIWIN (from PDF-2 software kit).

## System requirements

Win32 version: Windows XP or later

(Windows 7 or later is highly recommended).

Monospaced font: Lucida Console 12...16 pt.

## Files

The main archive contains the version of the program for Windows XP or later (RTP32.EXE, RTP.CHM, RTPWL.INI). Another archive includes the test examples, which contain the tables of diffraction lines of various samples or the data taken from PDF for calculation the parameters; examples are especially useful to understand the indexing process.

name | size | what contains |

rtp32.cab | 126 863 |
RTP 4.6 for Win32, build 2022-09-16 (yyyy-mm-dd) |

samples.cab | 5 490 |
examples of calculations |

*Remark: you can unpack the cab archives using the Explorer or the program extrac32.exe.*