Photo: David Hospital · CC BY-SA 4.0

Questionable sulfate mineral

Properties

Chemical formula

(Fe²⁺,Mg,Ni)(Cr,Al)₂(SO₄)₄*₂₂H₂O

Group

Sulfates

Crystal system

Monoclinic

Hardness (Mohs)

—

Color

—

Luster

—

Streak

—

Density

—

Cleavage

—

Fracture

—

Tenacity

—

Crystal habit

—

Transparency

—

Space group

—

Fluorescence

—

Magnetism

—

Radioactivity

—

Refractive index

—

Optical character

—

Birefringence

—

Pleochroism

—

Strunz classification

7.CB.85

Dana classification

29.7.3.6

IMA status

Questionable (Q)

IMA symbol

Rdt

Locality

🇺🇸 Redington mine

Type locality

—

Discovery year

—

Source: Wikidata