erbium
Let an agent identify erbium and its properties, relay isotopes, production and uses from reference sources, explain its role in fibre optics and lasers, and distinguish it from neighbouring lanthanides.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent identify erbium and its properties, relay isotopes, production and uses from reference sources, explain its role in fibre optics and lasers, and distinguish it from neighbouring lanthanides.
A chemical element with symbol Er and atomic number 68, a silvery lanthanide obtained from monazite, xenotime and ion-adsorption clays, whose pink-coloured compounds are used to tint glass and ceramics and whose ions amplify light in erbium-doped fibre amplifiers that carry internet traffic over optical fibre, as well as in medical and dental lasers and as a neutron absorber; erbium has six stable isotopes from erbium-162 to erbium-170 and is named after the Swedish village of Ytterby.
What it is for: Fibre amplifiers, lasers, glass colouring and specialised uses.
It can be relay properties and isotopes; explain production and uses; explain fibre optic role; distinguish from other lanthanides.
Distinguishing features
Optical amplification at 1550 nm
Pink compounds
Laser uses
Ytterby naming
What it looks like
A soft silvery metal; its compounds are pink.
Physical character
atomic number: 68 Z
standard atomic weight: 167.259 u
melting point: 1529 degrees C
stable isotopes: 6 count - Er-162, 164, 166, 167, 168, 170
How it is recognised
Element 68, symbol Er
Lanthanide of fibre amplifiers and pink glass
Holmium and thulium are the neighbouring lanthanides
Related models
is a kind of - in registry terms
is a kind of - in registry terms
is used in - the key telecom device
is adjacent to - element 67
In practice
Families and kinds
erbium metal
erbium compounds such as the oxide
stable isotopes from erbium-162 to erbium-170 and radioactive isotopes
erbium-doped fibre and lasers
erbium in glass, ceramics and alloys
Identifiers
symbol Er
CAS 7440-52-0
Standards and regulation
Chemical safety data sheets
Medical device regulation for erbium lasers
Rare earth trade rules
Failure modes and hazards
Supply concentration
Laser safety
Confusing with neighbouring lanthanides
Also called
+10
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.erbium
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Identify What erbium is.
Identity.
Properties
Properties.
Properties
Properties.
- What are the physical and chemical properties of erbium? definition
- Is the question about erbium or a neighbouring lanthanide? boundary
Isotopes
Isotopes.
Isotopes
Isotopes.
- Which isotopes exist, and how are they used? definition
- Which entry fits the specific isotope? action
Source Occurrence and production.
Supply.
Occurrence
Occurrence.
Occurrence
Occurrence.
- Where does erbium occur, and how is it separated? provenance
- Which entry fits rare earth mining? action
Supply
Supply.
Supply
Supply.
- Who produces erbium, and how is it traded, with sources? measurement
- Which sources are cited? provenance
Use Uses.
Application.
Optics
Fibre optics and lasers.
Optics
Optics.
- How do erbium-doped fibre amplifiers and erbium lasers work, and where are they used? provenance
- Which entry fits optical amplifier? action
Other
Glass, ceramics and nuclear.
Other
Other.
- How is erbium used in colouring, alloys and neutron absorption? provenance
- Which references are standard? provenance
Context History.
Context.
Discovery
Discovery.
Discovery
Discovery.
- How was erbium discovered by Mosander in 1843 and named after Ytterby? provenance
- Which entry fits Ytterby? action
Telecom
Telecommunications history.
Telecom
Telecom.
- How did the erbium-doped fibre amplifier transform long-distance communications in the 1990s? provenance
- Which entry fits the history of fibre optics? action
What the second pass must settle
- Should the fibre amplifier be the primary linked entry?
- How should reference data be linked?
- The registry entry has merged aliases naming isotopes; should they be split off?