Formula: MnBe(PO4)(OH,F)
Origin of name: for Heikki Allan Väyrynen (1888-1956), mineralogist and geologist, Technical High School, Helsinki, Finland.
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell: a = 5.411, b = 14.49, c = 4.73, β = 102.75°
Colour: Pale pink, salmon-pink, brownish pink to rose red
Diaphaneity: Transparent
Luster: Vitreous
Habit: crystals rare prismatic, elongated and striated along [001], typically in fine-grained, drusy aggregates
Hardness: 5
Specific gravity: 3.18 to 3.22
Cleavage: 3; {010} perfect, {100} good and {001} fair
Tenacity: Brittle, uneven fracture
Streak: White
Synonyms/varieties:
Comments:
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