Icosahedron  Helmut Werheit | Prof. Dr. rer. nat website:   http://www.werheit.mynetcologne.de/
e-mail:   helmut.werheit@koeln.de
  helmut.werheit@uni.duisburg-essen.de
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Some typical examples of specimens

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Einige typische Probenmaterialien

 

bB Wacker β-rhombohedral boron

high-purity single crystals
purity 99.9999%, except for carbon (typically 30 - 90 ppm)

Producer:
Wacker Chemistry, Munich, Germany
bB Starck  β-rhombohedral boron

industrial product

Producer:
 H.C. Starck, Goslar, Germany
BC Druse Boron Carbide (B4.3C)

Geode containing small single ctrystals
Industrial product

 Producer:
ESK, Kempten, Germany
BC ESK hot pressed  Boron Carbide (B4.3C)

hot-pressed
(mechanically poshed surface)

Producer:
ESK, Kempten, Germany
BC Starck  Boron Carbide
hot-pressed

Producer:
H.C. Starck, Goslar and Laufenburg, Germany 
BC isot enr  Boron Carbide

isotope-enriched
hot-pressed
(mechanically poshed surface)

Producer:
Institute of Stable Isotopes, Tbilisi, Georgia
YB66  YB66

Single crystal
(cleaved surface)

 Producer:
NIMS, Tsukuba, Japan
LaB6 
RE B6

Rare earth hexaborides
Single and polycrystals
(mechanically polished surfaces)

Producer:
I.N. Frantsevich Institute for Problems of Materials Science,  Kiev, Ukraine

 
SiC SiC

Industrial Product

 Producer:
ESK, Kempten, Germany