The way of producing needle-shaped wollastonite pow-der has never been released, the key to the matter is to get high enoughlength to width ratio of the particl
MDF cement material,a new kind of highstrength polymer cement,has an exellent proper-ty of bending strength.It is supposed that thisproperty attributes to the m
The new mineral fluorbritholite-(Ce)occurs innepheline syenite,marble xenoliths,sodalite syenite xenoliths andpegmatite dikes at Mont St.Hilaire,Quebec.It is asso