Siroquant is a commercial software package designed for quantitative phase analysis using X-ray diffraction (XRD) data, primarily through the Rietveld refinement method. It enables users to determine the composition of crystalline materials—such as minerals, cements, coals, and clays—by fitting full XRD powder patterns without needing physical standards, making it a standardless technique.

Key Features:

• Rietveld Analysis: Performs full-profile refinement to quantify phases accurately, including disordered or low-crystallinity materials like clays (e.g., montmorillonite, illite, kaolinite) using observed HKL files.

• Comprehensive Database: Includes a built-in library of crystal structures for common phases, with support for custom additions via tools like SiPhase.

• Ease of Use: Features a user-friendly Windows interface, automated staged refinement, absorption/contrast corrections, and compatibility with data from most XRD instruments.

• Advanced Capabilities: Handles up to 100 refinement variables, supports Bragg-Brentano geometry calibration, and offers an API for integration into automated workflows.

• Applications: Widely used in materials science, geology, mining, and industry for analyzing complex mixtures; it's been a top performer in international XRD round-robin tests like Reynolds Cups.

Developed originally by Sietronics Pty Ltd in Australia, Siroquant has been available since the 1990s and is now at version 5 (V5), running on modern Windows PCs. It's praised for its reliability and has been cited in scientific literature for over 25 years. For downloads, tutorials, or licensing, visit the official site at siroquant.com