A triclinic mineral, NaCaB5 O6 (OH)6 .5H2
O ; soft; forms silky white, saline crusts and masses of extremely fine
acicular crystals; in saline lake deposits as in Nevada and Chile. Also called
cotton ball; boronatrocalcite; natronborocalcite; natroborocalcite.
Source:
Dictionary of Mining, Mineral, and Related Terms