Critical Materials, Minerals & Microbial Mechanisms
An evidence-backed knowledge base for critical minerals and materials, connecting strategic commodities and mineral hosts to microbial extraction, biomineralization, and recovery mechanisms.
Material Kinds
Records distinguish chemical elements, mineral species and groups, commodities, and primary and secondary resources.
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Elements 66 records
Chemical elements distinct from ores, alloys, and waste streams.
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Minerals 340 records
Naturally occurring crystalline inorganic substances with defined IMA mineral status.
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Secondary Resources 110 records
Post-consumer and industrial byproducts including spent batteries, slags, red mud, and scrap.
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Commodities 32 records
Aggregated commercial products, traded raw materials, and manufactured chemical compounds.
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Primary Resources 31 records
Raw unrefined geological deposits, mined ores, and run-of-mine materials.
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Mineral Groups 7 records
Mineral supergroups and solid-solution series sharing related crystal structures.
Curated Processes
Mechanism records describe biological and abiotic processes, with experimental materials, conditions, evidence and limitations. Microbial involvement is stated explicitly.
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Bioleaching 184 mechanisms
Microbial solubilization and mobilization of target metals from ores, concentrates, and wastes.
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Biomineralization 106 mechanisms
Biological precipitation, crystallization, and synthesis of mineral phases or nanoparticles.
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Redox Transformation 61 mechanisms
Oxidation-reduction reactions that alter metal valence states; microbial involvement is specified in each record.
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Biosorption 17 mechanisms
Passive binding and retention of metal ions by microbial cell walls and biomass.
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Separation 31 mechanisms
Selective partitioning by biological or abiotic processes. See each record for microbial involvement, experimental conditions and recovery limits.
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Recovery 18 mechanisms
Integrated microbial processing schemes yielding concentrated or isolated materials.
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Other Transformations 159 mechanisms
Complex community transformations, multi-stage processes, or unclassified interactions.
Highlighted Strategic Materials
Representative materials spanning battery elements, rare earths, platinum group metals, and secondary resources:
| Material | Kind | Criticality | Key Mechanisms | Curated Evidence Boundary |
|---|---|---|---|---|
| Cobalt | element | Critical | bioleaching | Two-step flask assay: 10% (v/v) inoculum, 50 mL FeS medium (50 mM ferrous sulfate; 1% w/v elemental sulfur; initial pH 2… |
| Neodymium | element | Critical | bioleaching biosorption | Laboratory batch assays used SAG 211-12, dried at 90 degrees C for 24 h. Magnets were roasted at 950 degrees C for 7 h t… |
| Lithium | element | Critical | bioleaching | Live in-lab ore-derived culture was reported as At. ferrooxidans, without a strain accession. The species identifier nor… |
| Copper | element | Critical | bioleaching | Aitik-mine flotation concentrate, reported as 29.5% Cu, sieved to 50-100 micrometres; EDTA/NaOH and acetone washes, over… |
| Nickel | element | Critical | bioleaching | DSM 14887T, DSM 504, DSM 622, DSM 103717, DSM 9463 and BGR isolate RAM8 were mixed in equal culture volumes; the taxon I… |
| Palladium | element | Critical | redox transformation | Laboratory anaerobic batch assay using washed, nongrowing ATCC 29577 cells (0.5 g/L; 2.5 mL in sealed 12 mL serum bottle… |
| Tellurium | element | Critical | redox transformation | Laboratory aerobic exposure of LB-grown, twice PBS-washed cells in 50 mL PBS, pH 7.4, at 30 degrees C and 150 rpm for 0.… |
| Gallium | element | Critical | bioleaching | The type strain DSM 14887 was adapted to 5% w/v sludge with aluminum; NCBITaxon:930 identifies the species, not the stra… |
| Germanium | element | Critical | other | NCBITaxon:303 identifies the species, not ATCC 33015. The kinetic study used acetate-grown inocula, aerated mineral medi… |
| Spent fluorescent-lamp phosphor powder | secondary resource | — | bioleaching | Laboratory assays used 20 mg retorted phosphor powder per 500 microlitres biolixiviant (4% w/v) in 1.7 mL tubes, shaken … |
| GaAs wafer-production hydroxide sludge | secondary resource | — | bioleaching | The study used type strain DSM 14887, adapted to 5% w/v sludge with aluminum; NCBITaxon:930 anchors the species, not a s… |
| Chalcopyrite | mineral | — | bioleaching | Aitik-mine flotation concentrate contained 29.5% Cu. The authors report greater than 98% purity from aqua-regia digestio… |
Evidence & Curation Contract
CMMMech records enforce rigorous scientific limits:
- Chemical identity separation: An element (e.g. Lithium) is strictly distinct from its mineral hosts (e.g. Spodumene, Jadarite) and its commercial form.
- Mechanism evidence boundaries: Laboratory solubilization or binding is explicitly distinguished from full industrial recovery, elemental yield, or isolated pure metal.
- Negative & control evidence: Abiotic controls, matched acid baselines, and null results are recorded alongside positive extraction claims to prevent inflated efficacy.
- Structured provenance: Records cite their evidence sources and include material or organism identifiers where verified.