Where it forms, where it's found
- Geological setting
Supergene mineral.
- Type locality
- Block 14 opencut
- Broken Hill
- Broken Hill district
- Yancowinna Co.
- New South Wales
- Australia
-31.9591°, 141.4751°
2recorded occurrences
Safety & handling
Physical
Optical
- Notes
β ~1.70, measured using Cargille immersion liquids. Other refractive indices could not be measured.
Crystallography
- Space group
- C2/c
- Cell parameters
- a = 18.062(4) Å · b = 9.341(19) Å · c = 9.844(2) Å
- Cell angles
- β = 96.17(3) °
- Ratio a:b:c
- 1 : 0.517 : 0.545
- Morphology
White globules, tufted aggregates of fibrous crystals and radiating hemispheres of thin, colourless, bladed crystals.
- Type-locality form
White globules, tufted aggregates of fibrous crystals and radiating hemispheres of thin, colourless, bladed crystals.
- Comment
Crystal data from measurement at 123 K.
Crystal structure
Chemical composition
Synonyms
- IMA2008-047
- Nyholmiet
In other languages
- German
- IMA 2008-047 · Nyholmit
- Italian
- nyholmite
Classification
Strunz
10th ed.8.CB.10
- 8Phosphates, Arsenates, VanadatesClass
- 8.CPhosphates without additional anions, with H2ODivision
- 8.CBWith only medium-sized cations, RO4:H2O = 1:1Group
- 8.CB.10NyholmiteSpecies
Dana
8th ed.39.02.01.06
- 39Hydrated Acid Phosphates, Arsenates and VanadatesClass
- 39.02(AB)5[HXO4]2[XO4]2.xH2OType
- 39.02.01Hureaulite GroupGroup
- 39.02.01.06NyholmiteSpecies
Group, growth & confusion
Literature, links & citation
Citations
- 2008Williams, P.A., Hatert, F., Pasero, M. (2008) New minerals approved in 2008. in International Mineralogical Association: 1-13.
- 2009Elliott, P., Turner, P., Jensen, P., Kolitsch, U., Pring, A. (2009) Description and crystal structure of nyholmite, a new mineral related to hureaulite, from Broken Hill, New South Wales, Australia. Mineralogical Magazine, 73 (5) 723-735 doi:10.1180/minmag.2009.073.5.723 DOI: 10.1180/minmag.2009.073.5.723
- 2010Piilonen, P. C., Poirier, G. (2010) New Mineral Names. American Mineralogist, 95 (8) 1357-1361 doi:10.2138/am.2010.565DOI: 10.2138/am.2010.565
- 2011(2011) Nyholmite. Handbook of Mineralogy. Mineralogical Society of America
- 2011Piilonen, P. C., Rowe, R., Poirier, G., Tait, K. T. (2011) New Mineral Names. American Mineralogist, 96 (10) 1654-1661 doi:10.2138/am.2011.579DOI: 10.2138/am.2011.579
Cite this entry
@misc{mineral2026,
author = {Mineral Index editorial board},
title = {Nyholmite — Mineral Index},
year = {2026},
url = {https://mineralindex.org/minerals/nyholmite-39210},
note = {Accessed 2026-05-11}
}