Lithi­um is one of the most promis­ing strate­gic met­als of the mod­ern era. It is char­ac­ter­ized by low den­si­ty, high elec­tro­chem­i­cal activ­i­ty, and the abil­i­ty to form com­pounds with unique physic­o­chem­i­cal prop­er­ties. The range of lithi­um appli­ca­tions is rapid­ly expand­ing, and glob­al demand is grow­ing, pri­mar­i­ly due to the devel­op­ment of elec­tric trans­port, renew­able ener­gy, and portable elec­tron­ics. Lithi­um ores, as the main source of this met­al, are gain­ing increas­ing eco­nom­ic and strate­gic impor­tance.

Lithi­um ores is includ­ed in the list of min­er­als of nation­al impor­tance, approved by Res­o­lu­tion of the Cab­i­net of Min­is­ters of Ukraine No. 827 of Decem­ber 12, 1994, as ores of rare met­als.

Physical and mechanical properties

Lithi­um is the light­est of all met­als, with a den­si­ty of only 0.534 g/cm³, which is near­ly half the den­si­ty of water. The met­al has a sil­very-white col­or with a slight metal­lic lus­ter that quick­ly tar­nish­es in air due to the for­ma­tion of an oxide film. Lithi­um is soft—it can be cut with a knife, and its hard­ness on the Mohs scale is about 0.6. Its melt­ing point is 180.5 °C, and its boil­ing point is 1342 °C.

Mechan­i­cal­ly, lithi­um is a duc­tile and mal­leable met­al that can be eas­i­ly rolled and pressed. It has high ther­mal con­duc­tiv­i­ty and sig­nif­i­cant elec­tri­cal con­duc­tiv­i­ty, although these prop­er­ties are low­er than those of oth­er alka­li met­als. Lithi­um read­i­ly reacts with oxy­gen, nitro­gen, atmos­pher­ic mois­ture, many non­metals, and both organ­ic and inor­gan­ic acids, form­ing salts, among which lithi­um car­bon­ate and lithi­um hydrox­ide are the most impor­tant.

An impor­tant fea­ture of lithi­um is its abil­i­ty to form sta­ble alloys with many met­als, includ­ing alu­minum, mag­ne­sium, and cop­per, which deter­mines its wide use in met­al­lur­gy. In com­pounds, lithi­um often acts as a strong reduc­ing agent, mak­ing it indis­pens­able in a num­ber of chem­i­cal tech­nolo­gies.

Mineralogical composition and associated components

The main lithi­um-bear­ing min­er­als are spo­dumene, petal­ite, and lep­i­do­lite, which belong to the sil­i­cate class. Lithi­um may also occur in tour­ma­line and ambly­go­nite. Dur­ing deposit for­ma­tion, these min­er­als are often asso­ci­at­ed with oth­er valu­able ele­ments such as beryl­li­um, tan­ta­lum, nio­bi­um, cesium, as well as cop­per, nick­el, lead-zinc, molyb­de­num, zir­co­ni­um, anti­mo­ny, bis­muth, and flu­o­rite min­er­al­iza­tion. The pres­ence of such asso­ci­at­ed com­po­nents makes lithi­um deposits poten­tial com­plex sources of strate­gic and rare met­als. On the one hand, this com­pli­cates ben­e­fi­ci­a­tion and pro­cess­ing tech­nolo­gies; on the oth­er hand, it increas­es the over­all eco­nom­ic via­bil­i­ty of their devel­op­ment.

Global lithium reserves

Glob­al lithi­um resources are main­ly con­cen­trat­ed in two prin­ci­pal types of deposits—salars (brine deposits) and peg­matites. Salar deposits, or lithi­um-bear­ing brines, form in arid inter­mon­tane basins where salts accu­mu­late over thou­sands of years due to the evap­o­ra­tion of sur­face and ground­wa­ter. The largest deposits of this type are locat­ed in the so-called “Lithi­um Tri­an­gle” of South Amer­i­ca (Bolivia, Chile, Argenti­na), which togeth­er accounts for more than half of glob­al pro­duc­tion. In these regions, lithi­um is extract­ed from con­cen­trat­ed brines through evap­o­ra­tion in arti­fi­cial ponds, after which lithi­um car­bon­ate or hydrox­ide is pro­duced from the con­cen­trate.

Peg­matite deposits con­tain­ing lithi­um sil­i­cates (pri­mar­i­ly spo­dumene, petal­ite, and lep­i­do­lite) are the main source of lithi­um in Aus­tralia, Cana­da, Chi­na, Zim­bab­we, and sev­er­al oth­er coun­tries. These deposits formed dur­ing the final stages of crys­tal­liza­tion of mag­mat­ic melts asso­ci­at­ed with granitic intru­sions and are char­ac­ter­ized by rel­a­tive­ly sta­ble met­al con­tent. Aus­tralia is the glob­al leader in lithi­um pro­duc­tion from hard-rock ores, sup­ply­ing a sig­nif­i­cant share of the world’s spo­dumene con­cen­trate.

In addi­tion to these main types, less com­mon lithi­um sources include clay deposits, lithi­um-bear­ing geot­her­mal brines, and sea­wa­ter. Although their indus­tri­al devel­op­ment is cur­rent­ly lim­it­ed due to high pro­cess­ing costs, advances in extrac­tion tech­nolo­gies may sig­nif­i­cant­ly expand the glob­al resource base in the future.

Uses of lithium

The lead­ing appli­ca­tion of lithi­um is in the pro­duc­tion of lithi­um-ion bat­ter­ies used in elec­tric vehi­cles, ener­gy stor­age sys­tems, and portable elec­tron­ics. In met­al­lur­gy, lithi­um is added to alu­minum and mag­ne­sium alloys to reduce weight and increase strength, which is espe­cial­ly valu­able in space engi­neer­ing.

In the glass and ceram­ics indus­try, lithi­um com­pounds are used to pro­duce heat-resis­tant and ther­mal shock-resis­tant mate­ri­als. In the chem­i­cal indus­try, lithi­um serves as a cat­a­lyst and reagent in organ­ic syn­the­sis, as well as a com­po­nent of lubri­cants designed for high-tem­per­a­ture con­di­tions.

Lithium ore deposits in Ukraine

Lithi­um resources in Ukraine are main­ly con­cen­trat­ed with­in the Ukrain­ian Shield — a Pre­cam­bri­an crys­talline base­ment com­posed of Archean and Pro­tero­zoic rocks. The most promis­ing are peg­matite deposits formed dur­ing the late Pro­tero­zoic under deep-seat­ed intru­sive process­es. These deposits are char­ac­ter­ized by a sta­ble min­er­al com­po­si­tion and high lithi­um con­cen­tra­tions, pri­mar­i­ly in the form of spo­dumene, lep­i­do­lite, and petal­ite.

The Kirovohrad lithi­um belt is the country’s main lithi­um province. With­in it are the most stud­ied deposits:

• The Shevchenkivske deposit is one of the largest in Ukraine, rep­re­sent­ed by mas­sive zones of spo­dumene peg­matites. It also con­tains tan­ta­lum, nio­bi­um, cesium, rubid­i­um and beryl­li­um, which makes it an object of com­plex devel­op­ment. Lithi­um reserves are esti­mat­ed here as strate­gic for the coun­try.
• Polokhivske deposit — char­ac­ter­ized by a high con­tent of petal­ite and lep­i­do­lite. Along with lithi­um, indus­tri­al con­cen­tra­tions of cesium and rubid­i­um are present, as well as beryl­li­um min­er­als.

Dnipropetro­vsk block — is the sec­ond most impor­tant lithi­um min­er­al­iza­tion region. Here the most promis­ing are:

• Dobra deposit — has a com­plex struc­ture with sev­er­al zones of peg­matite bod­ies rich in spo­dumene. In addi­tion to lithi­um, ele­vat­ed con­tents of tan­ta­lum, nio­bi­um, and phos­pho­rus (in phos­phate min­er­als) are record­ed.
• Kru­ta Bal­ka — known for its thick lithi­um-bear­ing peg­matites enriched in lep­i­do­lite and petal­ite. Asso­ci­at­ed min­er­al­iza­tion includes molyb­de­num, zir­co­ni­um, and rare earth ele­ments.

Promis­ing areas for fur­ther explo­ration also include parts of the Azov megablock and the Inhul megablock of the Ukrain­ian Shield, where local occur­rences of lithi­um-bear­ing peg­matites have been iden­ti­fied, though their indus­tri­al poten­tial still requires con­fir­ma­tion. The eco­nom­ic impor­tance of Ukrain­ian deposits lies not only in their abil­i­ty to meet domes­tic lithi­um demand but also in their export poten­tial, espe­cial­ly giv­en the rapid rise in glob­al lithi­um prices. More­over, the com­plex com­po­si­tion of the ores allows for the recov­ery of addi­tion­al valu­able products—tantalum, nio­bi­um, cesium, beryl­li­um, and rare earth ele­ments, which increas­es the over­all effi­cien­cy of min­ing.

Lithi­um ores are a key raw mate­r­i­al for strate­gi­cal­ly impor­tant sec­tors of the glob­al econ­o­my. Their com­plex com­po­si­tion, the pres­ence of asso­ci­at­ed rare met­als, and the grow­ing demand for lithi­um make these deposits high­ly promis­ing for indus­tri­al devel­op­ment. Expand­ing lithi­um pro­duc­tion in Ukraine could not only sat­is­fy domes­tic needs but also strength­en the country’s posi­tion in the glob­al mar­ket of strate­gic met­als.

The geo­log­i­cal diver­si­ty of deposits—from large mag­mat­ic bod­ies to sed­i­men­ta­ry and meta­mor­phogenic formations—determines a wide range of approach­es to extrac­tion and pro­cess­ing of lithi­um-bear­ing raw mate­ri­als. Glob­al expe­ri­ence shows that the eco­nom­ic effi­cien­cy of such deposits increas­es sig­nif­i­cant­ly when asso­ci­at­ed com­po­nents are extract­ed in an inte­grat­ed man­ner.