Gatedalite
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About Gatedalite
Formula:
ZrMn2+2Mn3+4SiO12
Colour:
grey
Lustre:
Sub-Metallic
Specific Gravity:
4.783 (Calculated)
Crystal System:
Tetragonal
Member of:
Name:
Named by U. Hålenius and F. Bosi in 2013 in honor of amateur mineralogist Kjell Gatedal (b. 1947) from Nora, Örebro, Sweden, for his contributions to the mineralogy of Långban-type deposits.
Type Locality:
This page provides mineralogical data about Gatedalite.
Classification of Gatedalite
Approved
Approval Year:
2013
Physical Properties of Gatedalite
Optical Data of Gatedalite
Type:
Anisotropic
Anisotropism:
weak
Comments:
reflectivity in air varying between 17.1 and 20.8% in the visible spectral range
Chemical Properties of Gatedalite
Formula:
ZrMn2+2Mn3+4SiO12
IMA Formula:
ZrMn2+2Mn3+4O8(SiO4)
Elements listed:
Crystallography of Gatedalite
Crystal System:
Tetragonal
Class (H-M):
4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:
I41/acd
Setting:
I41/acd
Cell Parameters:
a = 9.4668(6) Å, c = 18.8701(14) Å
Ratio:
a:c = 1 : 1.993
Unit Cell V:
1,691.14 ų (Calculated from Unit Cell)
Z:
8
Comment:
I41/acd
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.730 | (100) |
| 2.367 | (12) |
| 2.359 | (6) |
| 1.6735 | (12) |
| 1.671 | (29) |
| 1.427 | (16) |
| 1.423 | (10) |
Comments:
From Type Description.
Type Occurrence of Gatedalite
General Appearance of Type Material:
small (⩽60 μm), grey, submetallic, irregularly rounded anhedral grains.
Place of Conservation of Type Material:
Type material is deposited in the collections of the Swedish Museum of Natural History, Stockholm, Sweden, registration number 20130001
Geological Setting of Type Material:
hausmannite-impregnated skarn
Associated Minerals at Type Locality:
Synonyms of Gatedalite
Relationship of Gatedalite to other Species
Member of:
Other Members of this group:
| Abswurmbachite | CuMn3+6(SiO4)O8 | Tet. 4/mmm (4/m 2/m 2/m) : I41/acd |
| Braunite | Mn2+Mn3+6(SiO4)O8 | Tet. 4/mmm (4/m 2/m 2/m) : I41/acd |
| Braunite-II | CaMn3+14(SiO4)O20 | Tet. 4/mmm (4/m 2/m 2/m) : I41/acd |
| Neltnerite | CaMn3+6(SiO4)O8 | Tet. 4/mmm (4/m 2/m 2/m) : I41/acd |
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.
References for Gatedalite
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Hålenius, U., Bosi, F. (2013) Gatedalite, IMA 2013-091. CNMNC Newsletter No. 18, December 2013, page 3256. Mineralogical Magazine: 77: 3249-3258.
Hålenius, U., Bosi, F. (2014) Gatedalite, a new Zr-rich braunite group mineral from Långban, Sweden. 21st General Meeting of the IMA (IMA2014), Gauteng, South Africa, September 1-5; Abstract Volume, 373.
Hålenius, U., Bosi, F. (2015) Gatedalite, Zr(Mn2+2Mn3+4)SiO12, a new mineral species of the braunite group from Långban, Sweden. Mineralogical Magazine: 79(3): 625-634.
Internet Links for Gatedalite
mindat.org URL:
https://www.mindat.org/min-46003.html
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Localities for Gatedalite
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Sweden (TL) | |
| Hålenius, U. and Bosi, F. (2013) Gatedalite, IMA 2013-091. CNMNC Newsletter No. 18, December 2013, page 3256; Mineralogical Magazine, 77, 3249-3258. |
Långban, Filipstad, Värmland, Sweden