strontium
Let an agent identify strontium and its properties, relay isotopes, occurrence, uses and health aspects from reference sources, and distinguish it from neighbouring alkaline earth metals.
Bundle → Layer → Finding → Questions Filled
4 bundles · 8 layers · 8 findings · 16 questions
Identify What strontium is.
Properties
Properties.
Properties
Properties.
- What are the physical and chemical properties of strontium? definition
- Is the question about strontium or a neighbouring element? boundary
Isotopes
Isotopes.
Isotopes
Isotopes.
- Which isotopes exist, and why does strontium-90 matter? definition
- Which entry fits the specific isotope? action
Source Occurrence and production.
Occurrence
Occurrence.
Occurrence
Occurrence.
- Where does strontium occur, and how is it produced? provenance
- Which entry fits celestine? action
Supply
Supply.
Supply
Supply.
- Who produces strontium, and how has demand changed, with sources? measurement
- Which sources are cited? provenance
Use Uses and health.
Uses
Uses.
Uses
Uses.
- How is strontium used in pyrotechnics, ceramics, magnets and other products? provenance
- Which references are standard? provenance
Health
Health and environment.
Health
Health.
- What are the health effects of stable and radioactive strontium, and what about strontium in medicine, in general terms? provenance
- Is the user asking about personal exposure or treatment, which needs a professional? boundary
Context History and science.
Discovery
Discovery.
Discovery
Discovery.
- How was strontium discovered near Strontian in Scotland and isolated by Davy? provenance
- Which entry fits the history of chemistry? action
Science
Isotope science.
Science
Science.
- How are strontium isotope ratios used in geology, archaeology and food provenance? provenance
- Which entry fits isotope geochemistry? action
Classifiers Filled
- Family
- Thing Registry
- Category
- Physical world and living systems
- Entry kind
- thing
- Plane
- PHY
- Domain
- PHY.MAT
- Other names and narrower kinds
- strontium-73, strontium-74, strontium-75, strontium-76, strontium-77, strontium-78, strontium-79, strontium-80, strontium-81, strontium-82, strontium-83, strontium-85
What it is Filled
A chemical element with symbol Sr and atomic number 38, a soft silvery alkaline earth metal that reacts with air and water, occurring in the minerals celestine and strontianite; strontium compounds give a red colour to fireworks and flares, were used in cathode ray tube glass, and are used in ceramics and magnets, the radioactive isotope strontium-90 is a fission product of concern in nuclear fallout, and strontium ranelate has been used in osteoporosis treatment; the element has four stable isotopes and many radioactive ones from strontium-73 upward.
Why it exists Filled
Let an agent identify strontium and its properties, relay isotopes, occurrence, uses and health aspects from reference sources, and distinguish it from neighbouring alkaline earth metals.
Distinguishing features Filled
- Red flame colour
- Strontium-90 fallout concern
- Chemically similar to calcium
- Celestine and strontianite ores
What robots and AI may and may not do Filled
Must not
- Confuse stable strontium with radioactive strontium in any report or label.
- Recommend strontium supplements as a treatment for bone disease.
- Handle or move material that may be radioactive without the licensed controls.
- Dispose of strontium compounds into drains or soil.
Only with a human decision
- Any handling of radioactive isotopes, which requires a licensed operator.
- Any medical use.
May
- Report strontium's chemistry, minerals and uses from reliable references.
- Distinguish stable strontium from its radioactive isotopes when describing a sample.
Moral aspects Filled
- Radioactive strontium from fallout and accidents concentrates in bone and harms people for decades.
- Supplements marketed from the element's name have caused real harm.
Who is affected
- People near contaminated sites
- Patients taking supplements
- Laboratory workers
Owners Filled
Steward
Nobody owns the element; the licensed holder answers for any radioactive material.
Master systems
- Radioactive material licensing registers
Links to other meta-models Filled
parent
- Q19563 - registry parent class
- Q428766 - registry parent class
related
- alkaline earth metal - in registry terms
- light metal - in registry terms
- calcium - element 20 in the same group
- strontium-90 - a fission product
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.strontium
- Wikidata: Q938 (https://www.wikidata.org/wiki/Q938)
- symbol: Sr
- CAS: 7440-24-6
Direct properties required Filled
- atomic number: 38 Z
- standard atomic weight: 87.62 u
- melting point: 777 degrees C
- strontium-90 half-life: 28.8 years
Recognition required Filled
- Element 38, symbol Sr
- Alkaline earth metal of red fireworks
- Calcium and barium are the neighbouring alkaline earth metals
- A silvery metal that turns yellowish in air.
Capabilities and actions required Filled
- relay properties and isotopes
- explain occurrence and uses
- relay health and environmental aspects
- distinguish from calcium and barium
Hazards and failure modes required Filled
- Strontium-90 uptake in bone
- Reactivity of the metal with water
- Confusing stable and radioactive strontium
Standards and interfaces required Filled
- Radiation protection limits for strontium-90
- Chemical safety data sheets
- Pyrotechnics regulations
Context of use required Filled
- Pyrotechnics, ceramics, magnets and specialised uses.
- strontium metal
- strontium compounds such as carbonate, nitrate and titanate
- stable isotopes 84, 86, 87 and 88
- radioactive isotopes including strontium-90 and light isotopes from strontium-73 to strontium-78
- strontium in medicine and dating
Sources Filled
- Wikidata item Q938: strontium - identity and sense of the item
- Wikipedia: Strontium - general description of the item
Open questions
- Should strontium-90 be a separate primary entry?
- How should reference data be linked?
- The registry entry has merged aliases naming short-lived isotopes; should they be split off?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q938/spec.json