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

Heidornite

This page is currently not sponsored. Click here to sponsor this page.
Hide all sections | Show all sections

About HeidorniteHide

Formula:
Na2Ca3B5O8(SO4)2Cl(OH)2
Colour:
Colorless
Lustre:
Vitreous
Hardness:
4 - 5
Specific Gravity:
2.753
Crystal System:
Monoclinic
Name:
Named in honour of Dr. Fritz Hans Otto Heidorn (1899 - ?), senior petroleum geologist for C. Deilmann Bergbau GmbH in Bentheim, Germany, for his scientific study of the Zechstein deposits.
This page provides mineralogical data about Heidornite.


Classification of HeidorniteHide

Approved, 'Grandfathered' (first described prior to 1959)
First Published:
1956
6.EC.30

6 : BORATES
E : Pentaborates
C : Phyllo-pentaborates
32.3.5.1

32 : COMPOUND SULFATES
3 : Anhydrous Compound Sulfates containing Hydroxyl or Halogen
10.3.2

10 : Borates with other anions
3 : Borates with sulphate

Physical Properties of HeidorniteHide

Vitreous
Transparency:
Transparent
Colour:
Colorless
Streak:
White
Hardness:
4 - 5 on Mohs scale
Cleavage:
Perfect
{001}
Density:
2.753(2) g/cm3 (Measured)    2.70 g/cm3 (Calculated)

Optical Data of HeidorniteHide

Type:
Biaxial (+)
RI values:
nα = 1.579 nβ = 1.588 nγ = 1.604
2V:
Measured: 63° to 77°, Calculated: 76°
Max Birefringence:
δ = 0.025
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
very weak

Chemical Properties of HeidorniteHide

Formula:
Na2Ca3B5O8(SO4)2Cl(OH)2
IMA Formula:
Na2Ca3B5O8(SO4)2(OH)2Cl

Crystallography of HeidorniteHide

Crystal System:
Monoclinic
Cell Parameters:
a = 10.19 Å, b = 7.76 Å, c = 18.81 Å
β = 93.33°
Ratio:
a:b:c = 1.313 : 1 : 2.424
Unit Cell V:
1,484.88 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Steeply dipyramidal showing {110{, {11-1}, {11-2}

Occurrences of HeidorniteHide

Paragenetic Mode(s):
•  Evaporite

Type Occurrence of HeidorniteHide

Place of Conservation of Type Material:
Natural History Museum, London, England, 1957,370.
Harvard University, Cambridge, Massachusetts, USA, 109587.
Geological Setting of Type Material:
Marine evaporite deposit
Associated Minerals at Type Locality:
Reference:
von Engelhardt, W., Füchtbauer, H., and Zemann, J. (1956) Heidornit Na2Ca3[Cl · (SO4)2 · B5O8(OH)2] ein neues Bormineral aus dem Zechsteinanhydrit - Mit einer röntgenographischen Untersuchung. Contributions to Mineralogy and Petrology: 5(3): 177-186.

Other Language Names for HeidorniteHide

Related Minerals - Nickel-Strunz GroupingHide

6.EC.05BiringucciteNa2B5O8(OH) · H2OMon.
6.EC.05NasiniteNa2[B5O8(OH)] · 2H2OOrth.
6.EC.10GoweriteCa[B5O8(OH)][B(OH)3] · 3H2OMon.
6.EC.15P-VeatchiteSr2B11O16(OH)5 · H2O
6.EC.15VeatchiteSr2B11O16(OH)5 · H2OMon. m : Bb
6.EC.20VolkovskiteKCa4[B5O8OH]4[B(OH)3]2Cl · 4H2OTric. 1 : P1
6.EC.25TuzlaiteNaCaB5O8(OH)2 · 3H2OMon. 2/m : P21/b
6.EC.35BrianroulstoniteCa3[B5O6(OH)6](OH)Cl2 · 8H2OMon.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

10.3.1SulfoboriteMg3[B(OH)4]2(SO4)(OH,F)2Orth. mm2
10.3.3CharlesiteCa6(Al,Si)2(SO4)2[B(OH)4](OH,O)12 · 26H2OTrig. 3m : P3 1c

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 HeidorniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
von Engelhardt, W., Füchtbauer, H., and Zemann, J. (1956) Heidornit Na2Ca3[Cl · (SO4)2 · B5O8(OH)2] ein neues Bormineral aus dem Zechsteinanhydrit - Mit einer röntgenographischen Untersuchung. Contributions to Mineralogy and Petrology: 5(3): 177-186 (in German).
American Mineralogist (1957): 42: 120.
Burzlaff, H. (1967): Die Struktur des Heidornit, Ca3Na2Cl(SO4)2B5O8(OH)2. Neues Jahrbuch für Mineralogie, Monatshefte: 1967: 157-169 (in German).
Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).

Internet Links for HeidorniteHide

Localities for HeidorniteHide

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.
Germany (TL)
 
  • Lower Saxony
    • Nordhorn
      • Frenswegen
von Engelhardt, W., Füchtbauer, H., and Zemann, J. (1956): Contributions to Mineralogy and Petrology 5(3), 177-186.
  • Thuringia
    • Harz
      • Nordhausen
        • Niedersachswerfen
Siemroth, J. (2008): Das Vorkommen von Boratmineralien im Werra-Anhydrit des Steinbruchs Kohnstein bei Niedersachswerfen am Südharz, Der Aufschluss, Vol. 59, 353-366
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 20, 2018 12:50:38 Page generated: October 9, 2018 11:05:49
Go to top of page