Document XRX5yXbg8NmjevKOLvY6QBgQR

FILE NAME: RT Vanderbilt (RTV) DATE: 1974 Oct 23 DOC#: RTV195 DOCUMENT DESCRIPTION: Memo RE TRM & Selected Area Diffraction Patterns of Asbestos Minerals in 4 Talc Samples Produced by RTV *' ''J-s. k i `'->` *- 'N*' ^ '> ' R* S . Liun&tt' ~ R&D V. K, Wolkodoff - R6D ' . a.i.; October 23, 1971 D istribu tion on Reverse Side TW A3D SBLECTED AREA DIFFRACTION PATTERNS OF ASBESTOS MINERALS IN FOI TALC SAMPLES PRODUCED L R. T. VANDERBILT COMPANY 1. At your req u est, I was able to contract time on the P h ilip s 200 electron microscope at Denver Research In s titu te to confirm by selected area d iffra ctio n p attern s, the presence o f ch ry so tile , an thophylllte and trem olite in a l l the R. T. Vanderbilt ta lc s designated K y ta l'200, Nytal'itGO, Asbestine 3X, and Asbestine 325a (please re fe r to my l e t t e r o f October 9 , 197^, which is based b a s ic a lly on FDA o p tic a l methods and the use o f our RCA electron microscopes to confirm c h r y s o tile ) . I t was f e l t th at selected area d iffra ctio n patterns o f the asbestos minerals using the P h ilip s 200 would lend p o sitiv e Id e n tific a tio n - & type o f an alysis which cannot be done on our RCA EMI/-3B model. 2. Table No. 1 not only id e n tifie s samples, but also id e n tifie s a l l Tr*M p rin ts and selected area d iffr a c tio n patterns o f the 33 prints attached to th is l e t t e r . The TEM plates are always on f i l e . The microscope constant (L A) was derived by averaging 21 microscope constant values based on lin e s o f Au and Pd. The microscope constant is : To ca lcu la te d-spacing in Angstrom u n it s , the follow ing formula was used: L A (A cm) spot p a ir radius (cm) 3. C h r y s o tile , a n th o p h y llite , and trem olite were a l l found in each o f the four R. T. Vanderbilt t a lc samples. P a rticu la r data fo r each sample are found in Table No. 3 end appropriate attached electron diffraction patterns. At tachmente t f i V f n r i f i A V 1, I, f f h CRMC-HT-TALC-000048 D istrib u tio n ; R, P, Carter* K. M, Fa- er - Ik - kv Paxil K otin , M.D, W. B, ReitJie ~ i<n - iw. F. J . Solon, J r , G, L, Swallow * ~ UN A. C , F. Finkblner, '"II - jw t . A. McKinney - 5W K, R. Keefe* - 2W P, A. Martinson - 2W C. J . Sulewski 2W W. L. VanDerbeek R. G, Rlede ' - 2S 2S ' r Fr L, Pundaaek J , P. Leineveber* W. C, S tre ib s. Spell* R. S . Lamar* V. E . Wolkodoff* *Prints attached only to those names followed by a ste risk . CRMC-HT-TALC-000049 TABLE 1 TEM Tabulatior of Micrographs and Selected Area D iffraction Patterns of Four Talc Samples From R, T. Vanderbilt Co, Vanderbilt Wo. Lab. No. Designation 1 IiC Yt255--l Nytal 2QG 2 RC 7**255-1 Nytal 200 3 RC 7U255-1 Nytal 200 L RC 71*255-1 Nytal 200 TEM Plate No., Magnification 2301.., 11,OOOX 2317A, 1 6 ,000X 23057, 22,000X 5 RC 71255-1 Nytal 200 RC.71255-1 Nytal 200 2306a , 22.000X T RC 7^255-1 Nytal 2-0 . 2307A, 22,OOOX S r.C'7^255-1 Nytal 200 ' 9 .Rt: 71.255-2 -Nytal 1*00 10 w 7t255-2 Nytal 1*00 ;1 lC r -255-2 Nytal 1*00 2302D, 11.000X 2318c, 16,OOOX 2308A, 22,00OX L iiC 71-255-? Nytal 1*00 . ,t?t . 7L255-2 Nytal 1*00 ",R RC 7i255~2 Nytal 1*00 230OA,' 22,000X *r V5 KC 7t255-2 Nytal 1*00 io 71*255-2 Nytal 1*00 2310A, 22,000X ** -1t RC 71255-3 Asbestine 3X 2303D, 11,000X Cl I\C 71*255-3 Asbestine 3X 2319D, 16,000X .) RC 7b255-3 Asbestine 3X 2311A, 22?000X r'O 77f* 71*255-3 Asbestine 3X ... RC 71.255-3 Asbestine 3X 2312A, 22*,000X u* 7t255-3 Asbestine 3X , 7I.255-3 Asbestine 3X 2313A, 22.000X ,}it RC 71*255-3 Asbestine 3X ;r:7**255-1* Asbestine 325 230ItA, 11-,OOOX ;?6 RC 71.255-** Asbestine 325 2322A, l6,000X SoleVted Area Diffraction Pattern, 35X Remarks - - 2305B - 2306B - 2307B 2308b 2309B - 23103 - 231XB - 2312B 2313E. M - Chrysotile fiber Pattern is of vide: fiber in 2305A, Chrysotile Anthophylllto rjCcv Anthophyllite fiber in 2306a Tremolite fiber Tremolite fiber ir. 2307A - - Chrysotile f;:r.'r Pattern of Cnrysoti above Anthophylli U- fibon Pattern of Antnophy above Tremolite f:i.O"r Pattern of TrowoXJ 1. above - - Chrysotile fiber or. bottom Pattern of dhrysoi. above Anthophyllite fib r Pattern of A;-,!.;;..,, above Tremolite fi.b Pattern of Trono1.; above Fiber is comi r . ; ;!<.f. t ile and Amphibcle CRMC-HT-TALC-000050 (2) Table 1 continued * . ' S e le c.a d Aroa Vanderbilt TEM Plate Diffraction No. Lao. No. Designation No , , Magniiication Pattern, 35X 27 RC 7V255-1 Asbestine 325 2322B 28 HC 7b255**k Asbestine 325 231**A, 22,000X 29 EC 7b255~^ Asbestine 325 30 . 'C 7 k 2 5 5 ~ k Asbestine 325 2315A, 22 ,OOOX 31 CJ"f>.'7**255-** Asbestine 325 32 P.C 7**255-* Asbestine 325 2316a , 22.000X 33 HC 7**255-** Asbestine 325 - 231**B -- 2315B "r 2316b Remark Chryeotile pattern superimposed on Ajnphibole pattern Chrysotile fiber Pattern of Chrycotilo above Longest fiber is Anthopbyllite Pattern of Artborl.y: i above Largest fiber in Tremolite Pattern o f Trewoiite above CRMC-HT-TALC-000051