Olympus TERRA II Portable X-ray Diffractometer

Overview

The Olympus TERRA II Portable X-ray Diffractometer is an engineered solution for field-deployable, laboratory-grade powder X-ray diffraction (XRD) analysis. Based on Bragg’s law and utilizing Cu-Kα radiation (λ = 1.5418 Å), the system performs phase identification and quantitative mineralogical analysis via full-pattern Rietveld refinement. Unlike conventional benchtop XRD systems requiring fixed installations, cryogenic cooling, or auxiliary infrastructure, the TERRA II integrates a sealed-tube microfocus X-ray source, a large-format charge-coupled device (CCD) detector, and a vibration-driven sample stage into a self-contained, battery-optional platform. Its design enables direct measurement of crystalline phases in geological, metallurgical, pharmaceutical, and environmental samples without reliance on compressed gases, external chillers, or high-voltage transformers—making it suitable for ISO/IEC 17025-compliant mobile labs, mine-site QA/QC, and emergency response scenarios.

Key Features

• True Portability: Weighing under 14.5 kg and operating on standard AC input or optional rechargeable battery packs, the TERRA II meets MIL-STD-810G shock/vibration requirements for transport in rugged environments.
• Dual-Mode Detection: The proprietary CCD detector simultaneously records both XRD diffraction patterns (2θ range: 5°–70°, step size configurable down to 0.02°) and energy-dispersive XRF spectra (Mg Kα to U Lα), enabling correlative crystallographic and elemental analysis from a single measurement.
• Vibratory Sample Stage: Incorporating NASA-patented oscillation mechanics, the stage induces continuous particle reorientation during acquisition—effectively mitigating preferred orientation artifacts and improving reproducibility across heterogeneous powders (RSD < 3% for quartz in multi-lab intercomparisons).
• Integrated Data Workflow: Real-time pattern acquisition, automatic phase matching against ICDD PDF-4+ database, and on-instrument Rietveld quantification eliminate dependency on offline processing software.
• Regulatory-Ready Architecture: Firmware supports audit trail logging, user role-based access control, electronic signatures, and 21 CFR Part 11-compliant data integrity features when deployed in GMP/GLP-regulated workflows.

Sample Compatibility & Compliance

The TERRA II accepts loose powders, drill cuttings, soil cores, slag fragments, and crushed ores. Minimal preparation—grinding to ≤150 µm and loading ≤15 mg onto the vibratory stage—is sufficient for robust data collection. No pressing, dilution, or binder addition is required. The instrument complies with IEC 61000-6-3 (EMC), IEC 61000-6-4 (industrial emission), and IEC 62471 (LED/X-ray safety). It meets ASTM D7907 (standard test method for quantitative phase analysis of cementitious materials by XRD) and supports ISO 13320:2020 (particle size analysis via laser diffraction) correlation protocols through integrated XRF-assisted matrix correction.

Software & Data Management

SwiftMin® software provides a unified interface for method setup, real-time visualization, and report generation. Key capabilities include:

• A single-dashboard view consolidating calibration files, SOPs, and historical analyses;
• Password-protected Lab Manager mode for administrator-defined calibrations and method locking;
• Automated data export to network shares or cloud repositories upon acquisition completion or timeout;
• Export formats include CIF, XYE, CSV, and PDF reports compliant with ASTM E1421 and ISO 21365 standards;
• Raw diffraction patterns stored in NeXus/HDF5 format for third-party refinement (e.g., TOPAS, GSAS-II) and long-term archival per ALCOA+ principles.

Applications

The TERRA II serves mission-critical roles across multiple sectors: in mining exploration, it delivers rapid clay mineral quantification (smectite/illite/kaolinite ratios) and sulfide phase mapping; in cement production, it monitors alite/belite proportions and free lime content in raw meals and clinker; in environmental remediation, it identifies arsenic-bearing scorodite or chromium-containing spinels in contaminated soils; in battery R&D, it tracks cathode crystallinity evolution (e.g., NMC 811 phase purity) during cycling. Its portability enables deployment in ISO 17025-accredited mobile laboratories performing ASTM D7348 (clay content in soils) or USP (crystallinity assessment of active pharmaceutical ingredients).

FAQ

Does the TERRA II require external cooling or compressed gas?
No. It operates with an air-cooled microfocus X-ray tube and requires no liquid nitrogen, helium, or compressed air supply.
Can it perform quantitative analysis without reference standards?
Yes. SwiftMin® uses internal standardless Rietveld refinement with embedded ICDD PDF-4+ database and empirical absorption corrections derived from concurrent XRF data.
Is the instrument suitable for regulatory submissions?
Yes. When configured with audit-trail enabled firmware and validated methods, it supports data integrity requirements under FDA 21 CFR Part 11, EU Annex 11, and ISO/IEC 17025 clause 7.7.
What is the minimum detectable phase concentration?
Detection limits vary by phase and matrix but typically range from 0.5–2 wt% for crystalline phases in favorable matrices, improved by 33% over TERRA I due to higher detector quantum efficiency.
How is calibration maintained in field use?
Calibration is performed using built-in Si reference standard; drift monitoring occurs automatically before each analysis, with recalibration triggered if angular deviation exceeds ±0.05° 2θ.