Peristerite

Where it forms, where it's found

45recorded occurrences

Source · OpenStreetMap

Varieties

Albite MoonstoneNa(AlSi₃O₈)
Variety
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Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
8OOxygen Oxygen 8 15.999 127.992
48.81%
14SiSilicon Silicon 3 28.085 84.255
32.13%
13AlAluminium Aluminium 1 26.982 26.982
10.29%
11NaSodium Sodium 1 22.990 22.990
8.77%
Total 262.219 100.00%
Mass share = atoms × atomic mass ÷ molar mass × 100
From Mindat formula

Mass composition breakdown
Element	Atoms	At. mass g/mol	Mass g/mol	Mass share
8OOxygen	Oxygen	8	15.999	127.992	48.81%
14SiSilicon	Silicon	3	28.085	84.255	32.13%
13AlAluminium	Aluminium	1	26.982	26.982	10.29%
11NaSodium	Sodium	1	22.990	22.990	8.77%
	Total	262.219	100.00%

Synonyms

Peristerit
Peristerita

Literature, links & citation

Citations

1962Ribbe, P. H.; VanCott, H. C. (1962) Unmixing in peristerite plagioclases observed by dark-field and phase-contrast microscopy. The Canadian Mineralogist, 7 (2). 278-290
1989Brown, William L. (1989) Glide twinning and pseudotwinning in peristerite: Si,Al diffusional stabilization and implications for the peristerite solvus. Contributions to Mineralogy and Petrology, 102 (3) 313-320 doi:10.1007/bf00373724DOI: 10.1007/bf00373724

Cite this entry

@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Peristerite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/peristerite-4520},
  note      = {Accessed 2026-05-11}
}