rubidium
Let an agent identify rubidium and its properties, relay isotopes, production and uses from reference sources, relay safety information, and distinguish it from other alkali metals.
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 rubidium and its properties, relay isotopes, production and uses from reference sources, relay safety information, and distinguish it from other alkali metals.
A chemical element with symbol Rb and atomic number 37, a soft, silvery-white alkali metal that melts just above room temperature, reacts violently with water and ignites in air; rubidium has two natural isotopes, of which rubidium-87 is weakly radioactive and used in rubidium-strontium dating, and the element is used in atomic clocks, cold atom research, photocells and specialty glass.
What it is for: Atomic clocks, research, photocells and specialty glass.
It can be relay properties and isotopes; explain production and uses; relay safety information; distinguish from other alkali metals.
Distinguishing features
Very reactive alkali metal
Low melting point
Rb-87 for geochronology
Atomic clock and cold atom use
What it looks like
A soft, silvery-white metal stored under inert gas or oil, tarnishing rapidly in air.
Physical character
atomic number: 37 Z
standard atomic weight: 85.468 u
melting point: 39.3 degrees C
rubidium-87 half-life: about 49 billion years
How it is recognised
Element 37, symbol Rb
Alkali metal, highly reactive
Potassium and caesium are the neighbouring alkali metals
Related models
is a kind of - in registry terms
is a kind of - in registry terms
is used in - the rubidium standard
is used in - through Rb-87
In practice
Families and kinds
rubidium metal
rubidium compounds such as the chloride and carbonate
isotopes from rubidium-71 to rubidium-103, with Rb-85 stable and Rb-87 long-lived
rubidium in atomic physics
Identifiers
symbol Rb
CAS 7440-17-7
Standards and regulation
Hazardous material handling and transport rules for alkali metals
Chemical safety data sheets
Failure modes and hazards
Fire and explosion on contact with water or air
Caustic hydroxide formation
Confusion with caesium in applications
Also called
+6
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.rubidium
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 rubidium is.
Identity.
Properties
Properties.
Properties
Properties.
- What are the physical and chemical properties of rubidium? definition
- Is the question about rubidium or a neighbouring alkali metal? boundary
Isotopes
Isotopes.
Isotopes
Isotopes.
- Which isotopes exist, and how is rubidium-87 used in dating? definition
- Which entry fits the specific isotope? action
Source Occurrence and production.
Supply.
Occurrence
Occurrence.
Occurrence
Occurrence.
- Where does rubidium occur, and how is it extracted as a by-product of lithium and caesium? provenance
- Which entry fits lepidolite? action
Supply
Supply.
Supply
Supply.
- Who produces rubidium, and in what quantities, with sources? measurement
- Which sources are cited? provenance
Use Uses and safety.
Application.
Uses
Uses.
Uses
Uses.
- How is rubidium used in atomic clocks, cold atom physics, photocells and glass? provenance
- Which entry fits the rubidium standard? action
Safety
Safety.
Safety
Safety.
- What hazards does rubidium present, and how is it handled? provenance
- Is the user planning to handle it, which needs trained supervision? boundary
Context History.
Context.
Discovery
Discovery.
Discovery
Discovery.
- How was rubidium discovered by Bunsen and Kirchhoff in 1861 by spectroscopy? provenance
- Which references are standard? provenance
Research
Research role.
Research
Research.
- Why is rubidium favoured in Bose-Einstein condensate and quantum research? provenance
- Which entry fits Bose-Einstein condensate? action
What the second pass must settle
- Should isotopes be separate entries?
- How should reference data be linked?
- The registry entry has merged aliases naming isotopes; should they be split off?