IMPORTANT MESSAGE. We need your support now to keep mindat.org running. Click here to find out why.
Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for Educators
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
StatisticsThe ElementsUsersBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Nyholmite

This page is currently not sponsored. Click here to sponsor this page.
Formula:
Cd3Zn2(AsO4)2(HAsO4)2 · 4H2O
Colour:
Colourless, white
Lustre:
Vitreous
Hardness:
3 - 3½
Specific Gravity:
4.23 (Calculated)
Crystal System:
Monoclinic
Name:
Named for Sir Ronald Sydney Nyholm (1917-1971), born at Broken Hill, New South Wales, and chair and professor of Chemistry at University College, London from 1955 to 1971. The name recognises his numerous contributions to inorganic chemistry, in particular the coordination chemistry of the transition metals, and also recognises his Broken Hill roots.
Hide all sections | Show all sections

Classification of NyholmiteHide

Approved
Approval Year:
2008
8.CB.10

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
B : With only medium-sized cations, RO4:H2O = 1:1
39.2.1.6

39 : HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES
2 : (AB)5[HXO4]2[XO4]2.xH2O

Physical Properties of NyholmiteHide

Vitreous
Transparency:
Transparent, Translucent
Colour:
Colourless, white
Hardness:
3 - 3½ on Mohs scale
Hardness Data:
Measured
Tenacity:
Brittle
Density:
4.23 g/cm3 (Calculated)
Comment:
for empirical formula

Chemical Properties of NyholmiteHide

Formula:
Cd3Zn2(AsO4)2(HAsO4)2 · 4H2O
IMA Formula:
Cd3Zn2(AsO3OH)2(AsO4)2 · 4H2O

Crystallography of NyholmiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Setting:
C2/c
Cell Parameters:
a = 18.062(4) Å, b = 9.341(19) Å, c = 9.844(2) Å
β = 96.17(3)°
Ratio:
a:b:c = 1.934 : 1 : 1.054
Unit Cell V:
1,651.23 ų (Calculated from Unit Cell)
Morphology:
White globules, tufted aggregates of fibrous crystals and radiating hemispheres of thin, colourless, bladed crystals.
Comment:
Crystal data from measurement at 123 K.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
8.985 (35)
8.283 (100)
6.481 (18)
6.169 (29)
4.878 (29)
4.656 (18)
4.491 (12)
4.296 (12)

Type Occurrence of NyholmiteHide

General Appearance of Type Material:
White globules, tufted aggregates of fibrous crystals and radiating hemispheres of thin, colourless, bladed crystals.
Geological Setting of Type Material:
Supergene mineral.
Associated Minerals at Type Locality:

Synonyms of NyholmiteHide

Relationship of Nyholmite to other SpeciesHide

Other Members of this group:
ChongiteCa3Mg2(AsO4)2(AsO3OH)2·4H2OMon. 2/m : B2/b
GiftgrubeiteCaMn2Ca2(AsO4)2(AsO3OH)2·4H2OMon. 2/m : B2/b
Hureaulite(Mn,Fe)5(PO4)2(HPO4)2 · 4H2OMon. 2/m : B2/b
MiguelromeroiteMnMn2Mn2(AsO4)2(HAsO4)2 · 4H2OMon. 2/m : B2/b
SainfelditeCa5(AsO4)2(AsO3OH)2 · 4H2OMon. 2/m : B2/b
VillyaelleniteMnMn2Ca2(AsO4)2(HAsO4)2 · 4H2OMon. 2/m : B2/b

Related Minerals - Nickel-Strunz GroupingHide

8.CB.05SerrabrancaiteMnPO4 · H2OMon. 2/m : B2/b
8.CB.10Hureaulite(Mn,Fe)5(PO4)2(HPO4)2 · 4H2OMon. 2/m : B2/b
8.CB.10SainfelditeCa5(AsO4)2(AsO3OH)2 · 4H2OMon. 2/m : B2/b
8.CB.10VillyaelleniteMnMn2Ca2(AsO4)2(HAsO4)2 · 4H2OMon. 2/m : B2/b
8.CB.10UM1997-09-AsO:CaHMgZn(Mg,Ca,Zn)5(AsO4)2(HAsO4)2 · 4H2OMon.
8.CB.10MiguelromeroiteMnMn2Mn2(AsO4)2(HAsO4)2 · 4H2OMon. 2/m : B2/b
8.CB.15FluckiteCaMn2+(HAsO4)2 · 2H2OTric. 1 : P1
8.CB.15KrautiteMn(HAsO4) · H2OMon. 2 : P21
8.CB.20Cobaltkoritnigite(Co,Zn)(HAsO4) · H2OTric. 1 : P1
8.CB.20KoritnigiteZn(HAsO4) · H2OTric. 1 : P1
8.CB.25YvoniteCu(HAsO4) · 2H2OTric.
8.CB.30GeminiteCu(HAsO4) · H2OTric.
8.CB.35SchubneliteFe3+VO4 · H2OTric.
8.CB.40RadovaniteCu2Fe3+(AsO4)(HAs3+O3)2 · H2OOrth. mmm (2/m 2/m 2/m) : Pnma
8.CB.45KazakhstaniteFe3+5V4+3V5+12O39(OH)9 · 9H2OMon.
8.CB.50KolovratiteNixZny(VO4)0.67(x+y) · nH2O
8.CB.55IrhtemiteCa4Mg(AsO4)2(HAsO4)2 · 4H2OMon.
8.CB.60BurgessiteCo2(H2O)4[AsO3(OH)]2(H2O)Mon. 2/m

Related Minerals - Dana Grouping (8th Ed.)Hide

39.2.1.1Hureaulite(Mn,Fe)5(PO4)2(HPO4)2 · 4H2OMon. 2/m : B2/b
39.2.1.2SainfelditeCa5(AsO4)2(AsO3OH)2 · 4H2OMon. 2/m : B2/b
39.2.1.3VillyaelleniteMnMn2Ca2(AsO4)2(HAsO4)2 · 4H2OMon. 2/m : B2/b
39.2.1.4UM1997-09-AsO:CaHMgZn(Mg,Ca,Zn)5(AsO4)2(HAsO4)2 · 4H2OMon.
39.2.1.4MiguelromeroiteMnMn2Mn2(AsO4)2(HAsO4)2 · 4H2OMon. 2/m : B2/b

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for NyholmiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Elliott, 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, 723-735.

Internet Links for NyholmiteHide

Localities for NyholmiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Australia (TL)
 
  • New South Wales
    • Yancowinna Co.
      • Broken Hill district
        • Broken Hill
Elliott, 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, 723-735.
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2018, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: October 19, 2018 16:27:39 Page generated: September 18, 2018 05:21:43
Go to top of page