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LITHOEN

Material

Cínovec zinnwaldite–calcium sulphate–calcium hydroxide sinter

The sinter produced by heating the zinnwaldite concentrate with calcium sulphate and calcium hydroxide in the weight ratio 6 : 4.2 : 2 at 950 degrees Celsius. Its diffractogram shows anhydrite, andradite, anorthite, cuspidine, fluorite and a lithium–potassium sulphate.

Classification

material class
INTERMEDIATE
physical form
SINTER
primary commodity entity id
entity:lithium-commodity

How this record is known

1
Settled consensus
Cited as the accepted position of the discipline.

1 of 1 claims on this page cite at least one registered source. Counts describe how each statement is known, not how likely it is to be true.

What Lithoen records

Each claim states how it is known and cites its evidence.

EstablishedLi 0.65 per cent, Rb 0.50 per cent, average, as mass fractions of the sinter. Phases formed on sintering, by X-ray diffraction: leachable LiKSO4, andradite, anorthite, cuspidine, traces of fluorite; residual anhydrite in all sinters. A phase identification is not a mass fraction and none of these phases is quantified.

Measured at this deposit

The sinter leaving the roasting stage carries 0.65 per cent lithium and 0.50 per cent rubidium, and its lithium sits in a leachable potassium–lithium sulphate formed during sintering alongside calcium silicate phases. The drop from the concentrate's 1.40 per cent lithium is a change in CONCENTRATION only: the sintering added calcium salts to the charge, and this corpus does not read a diluted concentration as a loss of lithium.

  • assertion basis: SUBJECT_MEASURED

Evidence support: Supported by the cited evidence one source

Evidence: Jitka 2009 Primary authority

In the knowledge graph

Record last updated 2026-09-11. Corrections follow the published corrections policy; superseded claims are retained, never silently edited.