---
title: "Materials & Crystals overview"
description: "Predict crystal polymorphs, search the opXRD database, and refine or simulate powder XRD patterns to tell solid forms apart."
tags:
  - section
  - materials-crystals
generated: true
---

Solid-form and materials work: predict crystal polymorphs and simulate the diffraction patterns that identify them. Polymorph and formulation risk can sink an otherwise good molecule, so this is late-stage developability, not discovery.

> **Availability**

> These tools are metered by credits and gated by your plan — plans set your monthly credits, available model families, and which modal-app tools you can run. See [Plans & tiers](/docs/plans-and-tiers).

## What you can achieve here

- Predict crystal polymorphs
- Simulate powder XRD patterns
- Identify and compare solid forms

For which tool fits each, see [What you can achieve](/docs/capabilities).

## Tools in this section

| Tool | What it does |
|---|---|
| [OpXRD](/docs/opxrd) | Search and analyze X-ray powder diffraction patterns from the opXRD database. |
| [XTalNet](/docs/xtalnet) | Predict candidate crystal structures from SMILES or a PXRD pattern, then screen polymorphs and co-crystals — a GPU job returning CIFs plus energies. |
| [PyWPEM](/docs/pywpem) | GPU-powered X-ray diffraction refinement, simulation, and spectroscopy analysis. |

## Read next