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发信人: zjliu (秋天的萝卜), 信区: Physics
标 题: [转载] 常用热力学学数据库(website)
发信站: 哈工大紫丁香 (Thu Dec 4 16:13:05 2003), 站内信件
http://thermodex.lib.utexas.edu/
http://www.lib.utexas.edu/chem/info/thermo.html#1
Sources of Thermochemical and Thermophysical Data
The sources listed here are in more or less increasing order of complexity, di
ff
iculty and expense. It is assumed that, in most cases, data for a single known
c
hemical substance are being sought. Knowing the CAS Registry Number in advance
w
ill save you considerable time, as many of these sources have an RN index or
search field.
The First-Stop Handbooks
Consult their indexes under the name of the property in question. A surprising
a
mount of basic thermodynamic data for common compounds can be found in them.
American Institute of Physics Handbook (3rd ed., 1972)
CRC Handbook of Chemistry and Physics (CRC Press, annual)
Consult the index under the property you're looking for.
International Critical Tables (McGraw-Hill, 1926-30) Ref Q 199 N32
Index Volume also lists individual compound names; dated but still very useful
.
Lange's Handbook of Chemistry (14th ed., McGraw-Hill, 1992)
Perry's Chemical Engineers' Handbook (7th ed., McGraw-Hill, 1997)
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Selected Web Tools
NIST Chemistry Webbook
A web site from the National Institute for Standards and Technology containing
t
hermophysical and spectral data on several thousand chemical species. Searchab
le
by name, registry number, formula, mol. wt., etc.
ThermoDex
A large number of data compilations are indexed in this database, which is sea
rc
hable by type of compound and name of property. While some Web-based resources
a
re included, most compilations indexed are in printed form only, and must be c
on
sulted in the library. ThermoDex is a guide to identifying them, and does not
contain the actua
l data.
PhysProp
Physical property data for over 25,000 compounds. The demo version is searchab
le
only by CAS registry number, and the displays lack the structure diagrams. Da
ta
are experimental, extrapolated, or estimated, from a variety of sources.
Materials Properties Locator Database (SUNY-Buffalo)
Similar in concept to ThermoDex, but wider in scope, this database contains re
co
rds for reference books that contain properties data (mechanical, physical, el
ec
trical, thermal, etc.) for particular types of materials. Abstracts, propertie
s
and materials covered are provided. The database can be searched by keyword o
r combinations of
keywords and phrases.
Thermodynamics Research Lab
A useful page of links to thermodynamics-related resources, databanks, and sof
tw
are available on the Web. From the Univ. of Illinois at Chicago.
NCMS SOLV-DB (Solvents Database)
Provides physical and chemical properties, environmental/regulatory data, and
ma
nufacturers of important solvents.
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Major Sets
TRC Thermodynamic Tables
Hydrocarbons: Ref QD 65 T4 1995, 13 vols.
Non-Hydrocarbons: Ref QD 65 T42 1995, 10 vols.
TRC (the Thermodynamics Research Center at Texas A&M University) compiles data
f
or organic compounds of interest to the petroleum industry. An electronic TRC
in
dex (on the CD-ROM workstation) is searchable by name, formula or Registry num
be
r. Note table and page of appropriate collection (hydrocarbons or nonhydrocar
bons), then consul
t the appropriate binder. (This electronic index also covers the API/TRC spect
ra
collections and Selected Data on Mixtures.)
Landolt-B?rnstein.
Located in the Reference Stacks.
Consult index volume under name of property.
Beilstein Handbook of Organic Chemistry.
For organic compounds only. Start with formula indexes. Beilstein is available
f
or electronically via the Crossfire system.
Gmelin Handbook of Inorganic Chemistry.
Volumes organized by element. Located in the Reference Stacks.
For inorganics/organometallics only; start with Formula Indexes.
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Indexes to Other Data Series
Indexes to the Journal of Physical and Chemical Reference Data.
This journal, now published by the AIP, contains articles reporting extensive
da
ta. Cumulative indexes to properties, classes of materials, and authors are fo
un
d at the end of vol.10 and vol.20. These cover 1972-91; cumulative indexes for
v
ol.21- appear in the last issue of each subsequent volume. These indexes list
only compound cla
sses, not individual compounds, however. JPCRD is also fully indexed in Chemic
al
Abstracts.
Property Index to NSRDS Data Compilations, 1964-72
Ref QC 100 U573 no.55
The National Standard Reference Data Service is overseen by NIST, the National
I
nstitute of Standards and Technology (formerly National Bureau of Standards) a
s
a coordinating body for many different data collection centers. Much of the da
ta
collected for this body is now published in JPCRD and its supplements, above
. NIST is also act
ively publishing datafiles of this kind of data as part of its Standard Refere
nc
e Database series. A NIST web site, called the Chemistry Webbook provides ther
mo
physical and spectral data for a number of compounds.
Selected Data on Mixtures 1973-
This quarterly contains data sheets on the thermodynamic properties of non-rea
ct
ing binary organic systems. Published by the Thermodynamics Research Center, w
it
h a cumulative index back to 1973.
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Online Sources
Beilstein Crossfire
Online version of the Beilstein Handbook, containing some thermodynamic data f
or
organic compounds.
Chemical Abstracts
Search a compound's registry number in context with the name or abbreviation o
f
property needed. For example:
enthalpy of 567-78-8 [SciFinder Research Topic Query]
=> s 567-78-8 (L) enthalpy [STN interface]
? s rn=567-78-8 (F) enthalpy [Dialog/U-Search interface]
This covers the literature only back to 1967. Since much thermodynamic data wa
s
collected before that, you should also consult the 1907-66 printed CA. This ma
y
be the only route for polymers and other hard-to-find compounds. The actual da
ta
are not given in CA; the original document must always be consulted.
STN STN Online Data Files
DIPPR
TRCTHERMO
DETHERM
The STN network has the best selection of online databanks containing reliable
t
hermodynamic data. These files correspond to printed sources available in the
li
brary, though they are usually more up-to-date. One advantage of searching onl
in
e is that the numeric property values themselves are searchable as well -- yo
u don't necessaril
y have to start with a known compound. Powerful crossfile searching and sortin
g
options are also available this way.
These databases are usually best searched by registry number in context with F
ie
ld Availability (/FA):
=> s 567-98-9/rn and code/fa
where "code" is the fieldcode for a particular data field.
A shortcut to identify a good STN file to search is to use Numeriguide. This i
ne
xpensive database allows you to enter the name of a property and returns a lis
t
of relevant files that contain this data, along with a definition, units used,
a
nd appropriate field codes. A very handy resource if you're unfamiliar with t
he jargon, or if t
he STN documentation isn't readily available.
Another shortcut is to first search for your substance in the Registry file, a
nd
examine the LC (Locator) field in the IDE display. This cross-references any
ot
her STN files that contain data on the compound in question. STN allows you to
e
nter these other files and search registry numbers from your previous answer
sets without havin
g to re-enter them each time.
Gmelin Handbook Online
Extensive data on thousands of inorganic and organometallic compounds.
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Chemical Abstracts (printed)
If looking for a value for a specific compound,
Determine first the CA Index Name for that compound, using the Index Guide (wi
th
common name) or Registry Handbook (with Registry Number).
Look up the CA index name in the most recent Collective Chemical Substance Ind
ex
. Scan entries under that name for the property name in question, or a relevan
t
"thermodynamic" keyword.
Work backwards and forwards in time in the Chemical Substance Indexes (before
19
72 in the Subject Indexes). Since much thermodynamic data was collected decade
s
ago, you might have to go far back in time to find an appropriate document.
If looking for articles about a specific property,
Look up the name of the property in the latest Index Guide.
look up that name in the corresponding General Subject Index.
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A Word about Critical Data
Reported thermodynamic values are only as reliable as the researchers who meas
ur
ed them. Data values should always be examined critically by the person needin
g
the information. Questions to ask: When was this work done? Who did it? What e
xp
erimental parameters or special conditions applied? What methods were used to
collect, calculat
e, and evaluate the data? Most data compilations list original literature refe
re
nces for the values they cite. Follow up on these if necessary. In journal art
ic
les, pay close attention to methodologies and conditions discussed. But you s
houldn't dismiss d
ata just because it's old. The same caveats apply to data you might find on th
e
Internet.
The term critically evaluated is a useful one to look for in secondary sources
:
this means a third party has examined the data and procedures and judged them
ac
curate. Data from TRC, DIPPR, NBS/NIST, CODATA, DECHEMA, Beilstein, Gmelin, an
d
Landolt-B?rnstein can be assumed to be "evaluated" and therefore relatively r
eliable. Other com
pilations must be used with appropriate caution. Many of them merely gather da
ta
from the literature uncritically and republish it in tabular form. Read the i
nt
roductions to these works to get the details. If validity is in doubt, try to
find another valu
e in another source, and compare them.
For more information on the collecting and reporting of scientific data, see T
he
Search for Data in the Physical and Chemical Sciences, by Linda Ray Arny (NY:
S
LA, 1984).
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Last updated 1/01
Compiled by David Flaxbart, Mallet Chemistry Library
Copyright 2001, The University of Texas at Austin.
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