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Volkovskite - Boulby Mine, Loftus, Redcar and Cleveland, North Yorkshire, England, UK
(#:MINS8836)
This is a parallel-growth cluster of bladed, glassy and gemmy, orangey crystals of Volkovskite.
Formula :
KCa
4
[Cl/(B(OH)
3
)
2
/(B
5
O_8_(OH))
4
] * 4 H
2
O
System:
triclinic
Hardness:
2½
Rarity:
very rare
Strunz id:V/K.5-10 - NITRATES, CARBONATES and BORATES
Name origin:
Named in honor of A.I. Volkovskaya (А.И. Волковской), Russian petrographer who first found the mineral in water insoluble residues from drill cores.
Specimen weight:10 gr.
Crystal size:3,5 cm tall
Overall size: 14mm x 9 mm x 35 mm
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