Photo: Robert M. Lavinsky · CC BY-SA 3.0

Sulfate mineral

Properties

Chemical formula

Ca₆Fe³⁺₂(SO₄)₂.₅[B(OH)₄](OH)₁₂·25H₂O

Group

Sulfates

Crystal system

Trigonal

Hardness (Mohs)

—

Color

Yellow

Luster

—

Streak

—

Density

—

Cleavage

—

Fracture

—

Tenacity

—

Crystal habit

—

Transparency

—

Space group

—

Fluorescence

—

Magnetism

—

Radioactivity

—

Refractive index

—

Optical character

—

Birefringence

—

Pleochroism

—

Strunz classification

7.DG.15

Dana classification

32.4.4.2

IMA status

Approved mineral and/or valid name (A)

IMA symbol

Strm

Locality

—

Type locality

—

Discovery year

—

Source: Wikidata