Kumdykolite

Na(AlSi3O8)
IMA status
  • Approved
IMA symbol
Kdy
IMA approved
2007
Also known as
  • IMA2007-049
  • Kumdykoliet

Where it forms, where it's found

Geological setting

eclogite from ultrahigh-pressure massif

Also found as product of crystallization of a silicate melt in polycrystalline inclusions (nanogranitoids) and as stepdaughter mineral, resulting from fluid-host interaction in hornblende.

Type locality
Lake Kumdikol diamond deposit
  1. Lake Kumdikol (Lake Kumdykol'
  2. Ozero Kumdykol')
  3. Prirechnoye
  4. Zerendi District
  5. Akmola Region
  6. Kazakhstan
12recorded occurrences
Source · OpenStreetMap

Crystallography

Crystal system
Orthorhombic
Space group
#73
Cell parameters
a = 8.24(1) Å · b = 8.68(1) Å · c = 4.84(1) Å
Ratio a:b:c
1 : 1.053 : 0.587
Unit cell volume
346.17 ų
Z
2
Type-locality form

micrometer-size crystals in multiphase inclusions in omphacite

Chemical composition

Constituent elements
Mass composition breakdown
ElementAtoms At. mass g/mol Mass g/molMass share
8OOxygenOxygen815.999127.992
48.81%
14SiSiliconSilicon328.08584.255
32.13%
13AlAluminiumAluminium126.98226.982
10.29%
11NaSodiumSodium122.99022.990
8.77%
Total262.219100.00%

Mass share = atoms × atomic mass ÷ molar mass × 100

From IMA formula

Synonyms

  • IMA2007-049
  • Kumdykoliet

In other languages

German
IMA 2007-049 · Kumdykolit
Italian
kumdykolite

Classification

Strunz
10th ed.

9.FA.45

  • 9SilicatesClass
  • 9.FTektosilicates without zeolitic H2ODivision
  • 9.FATektosilicates without additional non-tetrahedral anionsGroup
  • 9.FA.45KumdykoliteSpecies

Group, growth & confusion

In the same group
9 members
Commonly confused with
2 minerals

Literature, links & citation

Citations
  1. 2010Hwang, Shyh-Lung Shen, Chu, Hao-Tsu Yui, Sobolev, Nikolay V. (2010) Kumdykolite, an orthorhombic polymorph of albite, from the Kokchetav ultrahigh-pressure massif, Kazakhstan. European Journal of Mineralogy, 21 (6) 1325-1334 doi:10.1127/0935-1221/2009/0021-1970DOI: 10.1127/0935-1221/2009/0021-1970
  2. 2013Nemeth, P., Lehner, S. W., Petaev, M. I., Buseck, P. R. (2013) Kumdykolite, a high-temperature feldspar from an enstatite chondrite. American Mineralogist, 98 (5) 1070-1073 doi:10.2138/am.2013.4459DOI: 10.2138/am.2013.4459
  3. 2014Perraki, Maria, Faryad, Shah Wali (2014) First finding of microdiamond, coesite and other UHP phases in felsic granulites in the Moldanubian Zone: Implications for deep subduction and a revised geodynamic model for Variscan Orogeny in the Bohemian Massif. Lithos, 202. 157-166 doi:10.1016/j.lithos.2014.05.025DOI: 10.1016/j.lithos.2014.05.025
  4. 2014Kotková, J.; Škoda, R.; Machovič, V. (2014) Kumdykolite from the ultrahigh-pressure granulite of the Bohemian Massif. American Mineralogist, 99 (8-9). 1798-1801 doi:10.2138/am.2014.4889DOI: 10.2138/am.2014.4889
  5. 2015(2015) Kumdykolite. Handbook of Mineralogy. Mineralogical Society of America
Cite this entry
@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Kumdykolite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/kumdykolite-35578},
  note      = {Accessed 2026-05-11}
}