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New York University Department of Chemistry 4 Washington Plaoe, Room 410 New York, N.Y. 10003 Telephone: (212) 598-3427 7 ?o Ju ly 20, 1972 Mr* P e t e r H, B ix b y M e tro p o lita n T a lc Company, P . 0 . Box' AM 18-22 Bank S tr e e t Sum m it, New J e r s e y 0 79 0 I Inc. D ear Mr. B ix b y : We h a v e b e e n d e la y e d i n c a r r y i n g o u t th e x - r a y d i f f r a c t i o n a n a l y s e s o f t h e f o u r sp e c im e n s you s e n t u s on May 25 by s e v e r a l f a c t o r s , i n c l u d i n g 3Uinmer v a c a t i o n s and i n s tr u m e n ta l b re a k d o w n s . Howeve r , t h a t w ork h a s now b e e n c o m p le te d , and th e r e s u l t s a r e as follow s : . ' Sample C h lo r ite a -Q u a rtz D olom ite T rem o lite C h rv s o tile ''MI- 9 MA-8 C-2-RM C-15-V 1056 10* 2# n .d . n .d . 5* 10* 5* n .d . 5* 15* 20* n .d . n .d . 15* 10* n .d . n .d . 10* 10* y**? V ^" *'** In e a c h c a s e , t a l c c o n s titu te s th e rem ain d er of th e sam ple. Note t h a t th e C-2-RM an d C-15-V sp ecim en s a r e v e r y p o o r g ra d e t a l c s con ta in in g s u b s t a n t i a l am ounts o f a s b e s to s m in e ra ls , w hereas MI-9 is a very ex c e lle n t grade of ta lc . .. .. T here were no d e te c ta b le (-- n . d . ) amounts o f any o f th e a s b e s tifo rm m i n e r a ls i n S am p les M I-9 an d MA-8. The l i m i t o f d e t e c t i o n o f th e a s b e s tifo rm m in e ra ls by th e co n tin u o u s scan n in g te c h n iq u e employed is o f th e o r d e r o f m a g n itu d e o f 1 t o 2% by w e i g h t . ` The p r e c i s i o n o f th e d a t a t a b u l a t e d ab o v e i s 2% a b s o l u t e . A l l d a t a a r e i n th e u n i t s o f p e r c e n t com position by w eight. The o r ig in a l x -ra y d if f r a c tio n p a tte rn s a re enclo sed herew ith fo r rete n tio n in your f ile s . .. W ith v e r y b e s t p e r s o n a l r e g a r d s , -1 . -. , - ," SJLnpe r e l y ^ o u r s , VC J j' Si- 7 u Lewln P ro fe sso r o f Chem istry WCD 002469 'J- ti y^z>.. ) J6\,Vi*J -.... ( ______ 2 __y s/s. 4 i ~ .......... . o r ! ... J)...Nc< Vhvi-- ___ __...x77.._.......... 0V ....A / o . - f > r -7~ ... Ha!UC>\ MI'y ..... > S r. 7 > /Ja&ks : <1 /crr ....7 1 . Q'RM . - - -Jl"*;. -i"*"7.V-. ..........H a -<l :Vz ;> \ A / A 'i J(Si ` 7 WCD 002470