Kristjánite
A valid IMA mineral species
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Formula:
KNa2H(SO4)2
the structural formula may be given as KNa2(SO4HSO4), to reflect the presence of the unique (SO4-H-SO4)3- anion
Crystal System:
Monoclinic
Name:
named the new mineral after Kristján Jónasson, Geologist, Curator of Mineralogy and Petrology at Icelandic Institute of Natural History.
Unique Identifiers
Mindat ID:
470777
Long-form identifier:
mindat:1:1:470777:2
IMA Classification of Kristjánite
Approved
Approval year:
2023
Approval history:
IMA no. 2022-131
Classification of Kristjánite
7.AD.
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
A : Sulfates (selenates, etc.) without additional anions, without H2O
D : With only large cations
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
A : Sulfates (selenates, etc.) without additional anions, without H2O
D : With only large cations
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Kjn | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Chemistry of Kristjánite
Mindat Formula:
KNa2H(SO4)2
the structural formula may be given as KNa2(SO4HSO4), to reflect the presence of the unique (SO4-H-SO4)3- anion
the structural formula may be given as KNa2(SO4HSO4), to reflect the presence of the unique (SO4-H-SO4)3- anion
Element Weights:
Crystallography of Kristjánite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 6.9625(1) Å, b = 9.9953(1) Å, c = 11.0928(2) Å
β = 105.637(2)°
β = 105.637(2)°
Ratio:
a:b:c = 0.697 : 1 : 1.11
Unit Cell V:
743.40 ų (Calculated from Unit Cell)
Z:
4
Comment:
the space group is P21/n
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.37 Å | (59) |
| 3.65 Å | (32) |
| 3.48 Å | (78) |
| 3.36 Å | (100) |
| 3.18 Å | (76) |
| 2.85 Å | (28) |
| 2.83 Å | (43) |
| 2.73 Å | (38) |
Type Occurrence of Kristjánite
General Appearance of Type Material:
crystals up to about 100 μm in size in compact
aggregates
grows in white globules of smaller grains on
their surface
aggregates
grows in white globules of smaller grains on
their surface
Place of Conservation of Type Material:
collections of the Icelandic Institute of Natural History, Urriðaholtsstræti 6–8, 210 Garðabær, Iceland, catalogue number 24468
Geological Setting of Type Material:
high-temperature fumarole collection spot at 670° C.
Associated Minerals at Type Locality:
Synonyms of Kristjánite
Other Language Names for Kristjánite
Dutch:Kristjániet
German:Kristjánit
Related Minerals - Strunz-mindat Grouping
| 7.AD. | Bubnovaite | K2Na8Ca(SO4)6 |
| 7.AD. | Dobrovolskyite | Na4Ca(SO4)3 |
| 7.AD. | Calciolangbeinite | K2Ca2(SO4)3 |
| 7.AD. | Murphyite | Pb(Te6+O4) |
| 7.AD. | Cuprodobrovolskyite | Na4Cu(SO4)3 |
| 7.AD.05 | Mascagnite | (NH4)2SO4 |
| 7.AD.05 | Arcanite | K2SO4 |
| 7.AD.10 | Mercallite | KHSO4 |
| 7.AD.15 | Misenite | K8H6(SO4)7 |
| 7.AD.20 | Letovicite | (NH4)3H(SO4)2 |
| 7.AD.25 | Thénardite | Na2SO4 |
| 7.AD.25 | Glauberite | Na2Ca(SO4)2 |
| 7.AD.30 | Metathénardite | Na2SO4 |
| 7.AD.30 | Anhydrite | CaSO4 |
| 7.AD.35 | Baryte | BaSO4 |
| 7.AD.35 | Celestine | SrSO4 |
| 7.AD.35 | Olsacherite | Pb2(Se6+O4)(SO4) |
| 7.AD.35 | Anglesite | PbSO4 |
| 7.AD.40 | Kalistrontite | K2Sr(SO4)2 |
| 7.AD.40 | Palmierite | K2Pb(SO4)2 |
| 7.AD.45 | Ivsite | Na3H(SO4)2 |
| 7.AD.55 | Markhininite | TlBi(SO4)2 |
Radioactivity
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Kristjánite
mindat.org URL:
https://www.mindat.org/min-470777.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
References for Kristjánite
Localities for Kristjánite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and 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).
All localities listed without proper references should be considered as questionable.
Iceland (TL) | |
| Bosi et al. (2023) +1 other reference |