SCIENTIFIC ABSTRACT VASILYEVA, L.M. - VASILYEVA, L.M.

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R001858930006-1
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 6
• Document Creation Date: November 2, 2016
• Document Release Date: August 31, 2001
• Sequence Number: 6
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

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SMOLIYANINOVA, N.M.; KAPLIN, A.A.; VASILIYEVA, L.M.
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7539-1; E n. W/E~F WAiv Wltw (b) Ij-p(c) j--/jGA1B
ACC NR: AP5d5782 SOURCE CODE: TJII/0363/65/001/009/1493/1497
AUTHOR: Komissarova, L. N.; Men1kov, A. A.; Vasillyeva, L. M.
ORG: Moscow State University im. M. V. LomonoEova (Moskovskiy gosudarstven-
n universitet)
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TITLE: Properties of scandium phosphide
SOURCE: AN SSSR. Izvestiya. Neorganicheskiye materialy, v. 1, no. 9, 1965,
1493-1497
TOPIC TAGS: phosphide, scandium compound, corrosion resistance, physical
chemistry property
ABSTRACT: Scandium phosphide was obtained by di.rect reaction of metallic
scandium and red phosphorous. The substances were mixed in powder form in a
quar-tz ampoule. A table shows the detailed temperature conditions used for the
reaction. The resulting fine black powder was analyzed for scandium and phospho-
rous. The article,gives a diagram of the analytical apparatus and the results of
analysis in tabular form. X-ray analysis was.done by the powder method. The
x-ray photos were taken with a RKD-86 camera with filtered copper irradiation.
Card 1/ 2 P UDC:546. 6331181. 1

L 7539-66
ACC Nf,:: AP5025782
The ice ndium phosphide obtained had a crystal structure of the sodium chloride
-Arith a = 5. 302:0. 0015 kX, 2*,=4. Its density at 20C was 3. 33 grams/cm3
I type . The
compou.rid w." thermally stable during heating in a high vacuum (10-4 mm Hg).
It unfleiwent no polymorphic transtions in the intervaL from 20 to 1500C and did
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-not niell up to :1000 C. However, during heating above 000 C, even in a high
vacuum, the surface of the sample oxidizedArith the ormation of scandium phos-
phatc-. __Aoticeably above 350C.
In air, scandium phosphide begins to oxid ~
A sample held in air at 1200 C to constant weight, increases in weight by 7976
X-ray analysis of the oxidized sample shows the linen characteristic of anhydrous
ScP04(scandium. phosphate) with the parameters a=6. 578:t0. 003A, c=5. 7951:
0. 005A. The chemical resistance of scandium phosphide was investigated in
water, acids (HC1, H2SO4, and HN03), and alkalis (2:5 and 5076 solutions of NaOH)
of different concentrations. Results are shown in a table. In general, scandium
phosphide was found to be resistant to water and alkaLine solutions, but to be
easily decomposed by acids. Orig. art. has: 2 figures and 5 tables
.5U~ ','-'ODE:ICI SUBM DATE: 19May65/ ORIG REF: 003/.-OTH REF: 002

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