Arsenoclasite
A variety of Minerals
What is Arsenoclasite?
Arsenoclasite is red or dark orange brown in color. The mineral rarely occurs as crystals; rather it has either a massive or granular habit. When crystals are present, they are no larger than 5 millimetres (0.20 in). Arsenoclasite has been found in association with adelite, allactite, barite, calcite, dolomite, gatehouseite, hausmannite, hematite, manganoan ferroan calcite, sarkinite, and shigaite. The mineral occurs in fissures of metamorphosed Fe-Mn ore bodies and sedimentary Fe-Mn deposits.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Arsenoclasite before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
Arsenoclasite Localities Map
See where Arsenoclasite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Key Characteristics
Composition of Arsenoclasite
A 1971 study identified the mineral's structure as an array of oxygen atoms in a double hexagonal close packed pattern. However, a 1977 study discovered that all the manganese ions in arsenoclasite are six-coordinated, a constraint this structure cannot permit without severe distortion. The 1977 study identified arsenoclasite as isostructural to Co5(PO4)2(OH)4 and Mn5(PO4)2(OH)4.
Quick Facts
Physical Properties
- Color
- Red
- Hardness (Mohs)
- 5 - 6
- Density
- 4.27 g/cm³
Chemical Properties
- Chemical Formula
- Mn2+5(AsO4)2(OH)4
- Elements
- As, H, Mn, O
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Arsenoclasite FAQs
How do I identify Arsenoclasite?
Arsenoclasite can be identified by its hardness of 5 - 6 on the Mohs scale, Red color. Look for these key characteristics when examining specimens.
What color is Arsenoclasite?
Arsenoclasite typically appears in Red. Color can vary depending on impurities and formation conditions.
How hard is Arsenoclasite?
Arsenoclasite has a hardness of 5 - 6 on the Mohs scale. This gives it moderate hardness.
What is the composition of arsenoclasite of Arsenoclasite?
A 1971 study identified the mineral's structure as an array of oxygen atoms in a double hexagonal close packed pattern. However, a 1977 study discovered that all the manganese ions in arsenoclasite are six-coordinated, a constraint this structure cannot permit without severe distortion. The 1977 study identified arsenoclasite as isostructural to Co5(PO4)2(OH)4 and Mn5(PO4)2(OH)4.
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