Document oD4wQoQVVYq0Q6ryjk8rQJDbo

FILE NAME: WR Grace (WRG) DATE: April 1, 1959 DOC#: WRG 142 DOCUMENT DESCRIPTION: 1959 Letter from Zonolite Company regarding chemicals processed in lab. 06046505 A pril 1, 1959 A* C. Knight, M .D. Acting Superintendent Montana-State Tuberculosis Sanitarium ~ ~ -- RFD Ncu 1 D eer Lodge* Montana . - - " -- -- T D ear D r.'K night: - - T here haa been lo m i delay in anawe ring your la tte r of M arch 10 but we have been trying to gather together ao n e definite Inforis ation to acad you. The m in e ra ls which we process in oar m ill hare been classified as follow s: 1. Dlopslde, CaO*MgO*2S102 . . 2. Augite, C aO O (F e,M g )O A l2Oj *iSl03 . 3. V erm ieu lite, 10(Mg, Fe)0*44AlFe)20 j* 10310j . 7H20 4. P la g io d a s e s (tbs group), Ma2Q* Al2<J3*&S102 to CaO< A lgO y 2810^ 5. O rth o d a s e s (m ainlr m icrocllne) K20* Al20 2*6S102 . . - 6. B iotite (K, K),* 0(Mg, Fe)0* (Al, F e ) ,O. 3SIO, 7. ActinoUte, CaO* 3 (M g ,F e)O 4 S l0 2 8. T rem o lite, 2CaO* 5MgO* 8S102*HsO 9. T ra c e s of other m in e rals (m agnetite, tltanite, opatite, and quarts) have been detected at various tim es. To answer your specific questional 1. The dost in our m ill has nsver been analysed as such. It would probably be some combination of all the above m inerals. 2. Item s 7 and 8 are commonly ashestlform which Is an extrem ely short fibre asbestos. .Ve hope that this Inform ation Is of value to you in your study. Very truly yours ZONOLITE COMPANY . ED L/jbr By: . D. Lovick 20 156399