Where it forms, where it's found
- Geological setting
altered porphyritic rocks.
- Type locality
- Forra di Bulla (Puflerloch
- Pufler Loch
- Pufelserloch
- Pufelser Loch
- Bulla
- Pufels)
- Kastelruth (Castelrotto)
- Salten-Schlern (Salto-Sciliar)
- South Tyrol
- Trentino-Alto Adige/Südtirol
- Italy
46.5510°, 11.6308°
6recorded occurrences
Physical
- Hardness
- 1Talc
- 2Gypsum
- 3Calcite
- 4Fluorite
- 5Apatite
- 6Orthoclase
- 7Quartz
- 8Topaz
- 9Corundum
- 10Diamond
- Transparency
- Translucent
- Colour
- greenish black
- Density
- 3.25 g/cm³
Optical
- Optical type
- Biaxial
- Refractive index
- 1.713
- Surface relief
- High
- Principal indices
- nβ 1.713
Crystallography
- Cell parameters
- a = 8.8340 Å · b = 5.9528 Å · c = 19.1849 Å
- Cell angles
- β = 97.451 °
- Ratio a:b:c
- 1 : 0.674 : 2.172
- Z
- 4
- Comment
Non-standard space group A2/m (by analogy).
Chemical composition
Synonyms
- Pumpellyiet-(Fe3+)
In other languages
- German
- Pumpellyit-(Fe3+)
- Italian
- Pumpellyite- · Pumpellyite-(Fe+++) · Pumpellyite-(Fe3+)
Classification
Strunz
10th ed.9.BG.20
- 9SilicatesClass
- 9.BSorosilicatesDivision
- 9.BGSorosilicates with mixed SiO4 and Si2O7 groups; cations in octahedral [6] and greater coordinationGroup
- 9.BG.20Pumpellyite-(Fe3+)Species
Dana
8th ed.58.02.02.06
- 58Sorosilicates Insular, Mixed, Single, and Larger Tetrahedral GroupsClass
- 58.02Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)Type
- 58.02.02Pumpellyite groupGroup
- 58.02.02.06Pumpellyite-(Fe3+)Species
CIM
—16.21.8
- 16Silicates Containing Aluminum and other MetalsClass
- 16.21Aluminosilicates of Fe and CaGroup
- 16.21.8Pumpellyite-(Fe3+)Species
Group, growth & confusion
Literature, links & citation
Citations
- 1972Passaglia, E. (1972) Pumpellyite fortemente ferrifera rinvenuta a Bulla (Bolzano). Periodico di Mineralogia: 41: 273-280.
- 1973Passaglia, Elio, Gottardi, Glauco (1973) Crystal chemistry and nomenclature of pumpellyites and julgoldites. The Canadian Mineralogist, 12 (3) 219-223
- 2001(2001) Pumpellyite-(Fe3+). Handbook of Mineralogy. Mineralogical Society of America
Cite this entry
@misc{mineral2026,
author = {Mineral Index editorial board},
title = {Pumpellyite-(Fe3+) — Mineral Index},
year = {2026},
url = {https://mineralindex.org/minerals/pumpellyite-fe3-3308},
note = {Accessed 2026-05-11}
}