An elongate, shaped particle having three protrusions each extending from
and attached to a central position aligned along the central longitudinal
axis of the particle, the cross-section of the particle occupying the
area encompassed by the outer edges of six outer circles around a central
circle minus the area occupied by three alternating outer circles,
wherein each of the six outer circles is touching two neighbouring outer
circles and wherein three alternating outer circles are equidistant to
the central circle, have the same diameter, and may be attached to the
central circle.