General Literature Search

Google Scholar
ISI Web of Science
cond-mat arXiv Search
UMD Worldcat Search
IoP Eprintweb.org

Superconductor Databases

NIST Roberts Survey
SuperCon Database (XLS)
 

Materials Properties/Databases

ASM Alloy Phase Diagrams Database Search more than 28,000 binary and ternary phase diagrams and associated phase data
Landolt Bornstein Index  
NIST Database  
Handbook of Chemistry and Physics ONLINE version
CRC Database ONLINE version
Molar Mass Calculator  
PubChem Quite a few inorganic compounds including abstracts (how to access)
DiscoveryGate (how to access)
SciFinder (how to access)
Ternary Phase Diagrams  
Introduction to Phase Diagrams ASM site
Phase Diagram Tutorial CRC book chapter (2MB)
Metallurgy of Rare Earths CRC book (24MB)
Handbook of Metal Etchants CRC book (26MB)
Ionic Radii of Halides/Chacogenides R.D. Shannon, Acta Cryst. (1976). A32, 751-767
Guide to Aluminum Alloys  
NEUTRON Cross Sections  

Periodic Tables

Los Alamos
NIST Elemental Data Index
PT with Orbitals, Quantum Numbers
PT with Metalic Radius
"Zoo" of PTs - historical
Elements Properties
Webelements
Hyperphysics

Crystallography

SuppliersMisc

Crystallography Open Database (COD)  Search for CIF files of crystal structures
Crystal Lattice Structures (Navy)  
Crystallography Journal Search (IUCr)  
Crystallography Online  several resources
Crystal Twinning  
web-based XLAT  
Space Group Diagrams/Tables  
Alfa Aesar
ESPO Metals
Goodfellow
Cerac
Testbourne
Lectures on Superconductivity  free video streaming/downloads
Fermi Surface Database Fermi surfaces of elements
Phase Diagram of Water  
Lanthanides  
UMD Logos