Photo: Krivovichev, Sergey V. and Panikorovskii, Taras L. and Yakovenchuk, Victor N. · CC BY-SA 4.0

Phosphate mineral

Properties

Chemical formula

NaCaCu₅(PO₄)₄[AsO₂(OH)₂]·7H₂O

Group

Phosphates

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

—

Dana classification

—

IMA status

Approved mineral and/or valid name (A)

IMA symbol

Efv

Locality

🇷🇺 Kester tin deposit

Type locality

—

Discovery year

—

Source: Wikidata