Research any topic before you write.

Find related topics. | Discover entities. | See connections. | Build a topical map.

Todorokite

Todorokite is a complex hydrous manganese oxide mineral with generic chemical formula (Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12·3-4H2O. It was named in 1934 for the type locality, the Todoroki mine, Hokkaido, Japan. It belongs to the prismatic class 2/m of the monoclinic crystal system, but the angle β between the a and c axes is close to 90°, making it seem…

Characters, Other localities & Structure

Use the mouse wheel or two fingers (on touchscreens) to zoom in and out of the map.

Research this topic

Explore the main themes, entities and connections around Todorokite. Start with the topic map, then use the sections below for research and deeper semantic analysis.

Explore this topic

Start with a few of the strongest sections from the source topic. These are research directions, not a list of keywords you must use.

Key facts & relationships

High-confidence facts extracted from structured source data. Use them as anchors for further research.

Birefringence
nearly 0.02
Category
Manganese minerals
Cleavage
Perfect on {100} and {010}
Color
Dark brown or brownish black, brown in transmitted light
Crystal class
Prismatic (2/m) (same H-M symbol)
Crystal habit
Aggregates of minute lathlike crystals

Topics to explore

Browse the full topic structure. Each item opens a new analysis centered on that subject.

Overview

Structure

Unit cell

Appearance

Optical properties

Physical properties

Solubility

Other characteristics

Type locality

Occurrence and associations

Other localities

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

Map overview Semantic statistics

Todorokite

Nodes137
Edges136
Triples128
Avg. degree1.99
Density0.014599
Components1

How this topic connects Entity context

See the strongest relationship patterns around the current topic before diving into the raw triples.

Todorokite

Top relations

related to Structure · 20
Todorokite → Ag, Although, Ba, Ba2, Ca2, Co2, Cu2, H2O, Manganese, Mg2, Mn2, Mn3, Mn4, Na, Ni2, O6, Pb2, The, These, This
related to United States · 14
Todorokite → Associated, At Saipan, At Sterling Hill, CaCO3, Charco Redondo, Cuba, It, Mariana Islands, New Jersey, Pacific Ocean, The, Zn2SiO4, ZnFe3, ZnMn4
related to Occurrence and associations · 13
Todorokite → Akaigawa, Although, At, Ca2Mn2, Hokkaido, It, Japan, MnCO3, OH, P2O5SO3, Pacific Ocean, SiO2, The
related to Austria · 9
Todorokite → At Huttenberg, Austria, Carinthia, Charco Redondo, Cuba, It, Mn4, O2, The
related to Cuba · 7
Todorokite → At Charco Redondo, Commonly, Cuba, Hardness, It, Oriente Province, The
related to Brazil · 6
Todorokite → Bahia, Brazil, Mn2, Saude, SiO4, Urandi
related to Optical properties · 6
Todorokite → All, For, In, The, This, When
related to Portugal · 6
Todorokite → Algarve, At Farragudo, It, Mn2, Mn4, Portugal
related to Solubility · 6
Todorokite → Cl2, H2SO4, HCl, HNO3, It, MnO2
related to Other characteristics · 4
Todorokite → Na4Mn14O27, This, When, X-ray

Important terminology Word statistics

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

manganese brown fibrous crystal minerals dark parallel black mn4 luster also type light crystals hardness found occurs soft mineral formula

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
TodorokiteBirefringencenearly 0.021.00infobox
TodorokiteCategoryManganese minerals1.00infobox
TodorokiteCleavagePerfect on {100} and {010}1.00infobox
TodorokiteColorDark brown or brownish black, brown in transmitted light1.00infobox
TodorokiteCrystal classPrismatic (2/m) (same H-M symbol)1.00infobox
TodorokiteCrystal habitAggregates of minute lathlike crystals1.00infobox
TodorokiteCrystal systemMonoclinic1.00infobox
TodorokiteDana classification7.8.1.11.00infobox
TodorokiteDiaphaneityOpaque, transparent in very thin slivers1.00infobox
TodorokiteFormula(Na,Ca,K,Ba,Sr) 1-x(Mn,Mg,Al) 6O 12·3-4H 2O1.00infobox
TodorokiteFormula mass583.05 g/mol1.00infobox
TodorokiteFusibilityDoes not fuse1.00infobox
TodorokiteIMA symbolTdr1.00infobox
TodorokiteLusterMetallic to dull, silky in aggregates1.00infobox
TodorokiteMohs scale hardness.mw-parser-output .frac{white-space:nowrap}.mw-parser-output .frac .num,.mw-parser-output .frac .den{font-size:80%;line-height:0;vertical-align:super}.mw-parser-output .frac .de…1.00infobox
TodorokiteOptical propertiesBiaxial1.00infobox
TodorokitePleochroismX = dark brown, Z = yellowish brown1.00infobox
TodorokiteRefractive indexGreater than 1.741.00infobox
TodorokiteSolubilitySoluble in acids1.00infobox
TodorokiteSpace groupP2/m (no. 11)1.00infobox
TodorokiteSpecific gravity3.5 to 3.81.00infobox
TodorokiteStreakBlack or dark brown1.00infobox
TodorokiteStrunz classification4.DK.10 (10 ed) 4/D.09-10 (8 ed)1.00infobox
TodorokiteTwinningContact twins are common1.00infobox
Todorokiteis acomplex hydrous manganese oxide mineral with generic chemical formula0.90text
Todorokiteis acommon product of oxidation and leaching of primary manganese carbonate and silicate minerals0.90text

Related concept clusters Concept neighborhoods

These clusters group vocabulary that occurs around closely connected concepts in the source material.

    Connections between topic areas Semantic bridges

    Bridges can reveal useful research angles that are easy to miss in a flat list of related terms.

    Min side: 3
    For writers, content strategists, SEOs, marketers and creators — from quick topic research to advanced semantic analysis.