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Slawsonite

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About SlawsoniteHide

04159360014949338888454.jpg
Chester Baker Slawson
Formula:
Sr(Al2Si2O8)
Colour:
Colourless, gray
Lustre:
Vitreous
Hardness:
5½ - 6½
Crystal System:
Monoclinic
Member of:
Name:
Named by Dana T. Griffin, Paul H. Ribbe, and Gerald V. Gibbs in 1977 in honor of Chester "Chet" Baker Slawson [April 21, 1898 Greenville, Michigan, USA - March 12, 1964 Ann Arbor, Michigan, USA], Professor of Mineralogy, University of Michigan at Ann Arbor.
Feldspar Group.

May form in course of heating of its monoclinic polymorph, UM1995-41-SiO:AlSr.


Classification of SlawsoniteHide

Approved
9.FA.50

9 : SILICATES (Germanates)
F : Tektosilicates without zeolitic H2O
A : Tektosilicates without additional non-tetrahedral anions
76.1.5.2

76 : TECTOSILICATES Al-Si Framework
1 : Al-Si Framework with Al-Si frameworks
16.12.2

16 : Silicates Containing Aluminum and other Metals
12 : Aluminosilicates of Sr, Ba and Zn

Physical Properties of SlawsoniteHide

Vitreous
Transparency:
Transparent
Colour:
Colourless, gray
Hardness:
5½ - 6½ on Mohs scale

Optical Data of SlawsoniteHide

Type:
Biaxial (-)
RI values:
nα = 1.570 - 1.573 nβ = 1.581 - 1.582 nγ = 1.585 - 1.586
2V:
Measured: 55° to 82°, Calculated: 60° to 66°
Max Birefringence:
δ = 0.015
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r < v medium

Chemical Properties of SlawsoniteHide

Formula:
Sr(Al2Si2O8)
Idealised Formula:
(Sr,Ca)Al2Si2O8
Common Impurities:
Ti,Fe,Mg,Na,K,H2O

Crystallography of SlawsoniteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/a
Cell Parameters:
a = 8.89 Å, b = 9.35 Å, c = 8.33 Å
Ratio:
a:b:c = 0.951 : 1 : 0.891
Unit Cell V:
0.00 ų (Calculated from Unit Cell)

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0000553SlawsoniteGriffen D T, Ribbe P H, Gibbs G V (1977) The structure of slawsonite, a strontium analog of paracelsian American Mineralogist 62 31-3519770293
0002652SlawsoniteBenna P, Bruno E (2001) Single-crystal in situ high-temperature structural investigation on strontium feldspar American Mineralogist 86 690-6962001synthetic0293
0002653SlawsoniteBenna P, Bruno E (2001) Single-crystal in situ high-temperature structural investigation on strontium feldspar American Mineralogist 86 690-6962001synthetic0433
0002654SlawsoniteBenna P, Bruno E (2001) Single-crystal in situ high-temperature structural investigation on strontium feldspar American Mineralogist 86 690-6962001synthetic0603
0002655SlawsoniteBenna P, Bruno E (2001) Single-crystal in situ high-temperature structural investigation on strontium feldspar American Mineralogist 86 690-6962001synthetic0783
0002656SlawsoniteBenna P, Bruno E (2001) Single-crystal in situ high-temperature structural investigation on strontium feldspar American Mineralogist 86 690-6962001synthetic0943
0004407SlawsoniteBenna P, Nestola F, Ballaran T B, Balic-Zunic T, Lundegaard L F, Bruno E (2007) The high-pressure structural configurations of Ca0.2Sr0.8Al2Si2O8 feldspar: The I-1-I2/c and I2/c-P2_1/c phase transitions American Mineralogist 92 1190-11992007synthetic0.0001293
0004408SlawsoniteBenna P, Nestola F, Ballaran T B, Balic-Zunic T, Lundegaard L F, Bruno E (2007) The high-pressure structural configurations of Ca0.2Sr0.8Al2Si2O8 feldspar: The I-1-I2/c and I2/c-P2_1/c phase transitions American Mineralogist 92 1190-11992007synthetic3.2293
0004409SlawsoniteBenna P, Nestola F, Ballaran T B, Balic-Zunic T, Lundegaard L F, Bruno E (2007) The high-pressure structural configurations of Ca0.2Sr0.8Al2Si2O8 feldspar: The I-1-I2/c and I2/c-P2_1/c phase transitions American Mineralogist 92 1190-11992007synthetic4.4293
0004410SlawsoniteBenna P, Nestola F, Ballaran T B, Balic-Zunic T, Lundegaard L F, Bruno E (2007) The high-pressure structural configurations of Ca0.2Sr0.8Al2Si2O8 feldspar: The I-1-I2/c and I2/c-P2_1/c phase transitions American Mineralogist 92 1190-11992007synthetic6.2293
0004411SlawsoniteBenna P, Nestola F, Ballaran T B, Balic-Zunic T, Lundegaard L F, Bruno E (2007) The high-pressure structural configurations of Ca0.2Sr0.8Al2Si2O8 feldspar: The I-1-I2/c and I2/c-P2_1/c phase transitions American Mineralogist 92 1190-11992007synthetic7.4293
CIF Raw Data - click here to close

Type Occurrence of SlawsoniteHide

Synonyms of SlawsoniteHide

Other Language Names for SlawsoniteHide

Relationship of Slawsonite to other SpeciesHide

Member of:
Other Members of this group:
AlbiteNa(AlSi3O8)Tric. 1
AmazoniteK(AlSi3O8)
Andesine(Na,Ca)[Al(Si,Al)Si2O8]Tric.
AnorthiteCa(Al2Si2O8)Tric. 1 : P1
Anorthoclase(Na,K)AlSi3O8Tric.
BanalsiteNa2BaAl4Si4O16Orth. mm2 : Iba2
Buddingtonite(NH4)(AlSi3)O8Mon. 2 : P21
Bytownite(Ca,Na)[Al(Al,Si)Si2O8]Tric.
CelsianBa(Al2Si2O8)Mon. 2/m
DmisteinbergiteCa(Al2Si2O8)Trig. 3 2 : P3 1 2
FerrisanidineK[Fe3+Si3O8]Mon. 2/m : B2/m
FilatoviteK(Al,Zn)2(As,Si)2O8Mon. 2/m
HexacelsianBaAl2Si2O8Hex. 6/mmm (6/m 2/m 2/m) : P63/mcm
Hyalophane(K,Ba)[Al(Si,Al)Si2O8]Mon.
KokchetaviteK(AlSi3O8)Hex. 6/mmm (6/m 2/m 2/m) : P6/mmm
KumdykoliteNa(AlSi3O8)Orth. mmm (2/m 2/m 2/m) : Pnnm
Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
MicroclineK(AlSi3O8)Tric. 1
Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
OrthoclaseK(AlSi3O8)Mon. 2/m : B2/m
ParacelsianBa(Al2Si2O8)Mon.
ReedmergneriteNaBSi3O8Tric.
RubiclineRb(AlSi3O8)Tric.
SanidineK(AlSi3O8)Mon. 2/m : B2/m
StronalsiteNa2SrAl4Si4O16Orth.
SunstoneA variety of feldspar (microcline or oligoclase, more rarely labradorite) that has schiller, ...
SvyatoslaviteCa(Al2Si2O8)Orth.
Unnamed (New Ordered Member of the Alkali Feldspar Series)KNa(Si6Al2)O16Mon. m

Related Minerals - Nickel-Strunz GroupingHide

9.FA.05KaliophiliteKAlSiO4Hex.
9.FA.05KalsiliteKAlSiO4Hex. 6 2 2 : P63 2 2
9.FA.05NephelineNa3K(Al4Si4O16)Hex. 6 : P63
9.FA.05Panunzite(K,Na)AlSiO4Hex. 6 : P63
9.FA.05Trikalsilite(K,Na)AlSiO4Hex.
9.FA.05Yoshiokaite(Ca,Na)[Al(Al,Si)O4]Trig. 3 : P3
9.FA.05MegakalsiliteKAlSiO4Hex. 6 : P63
9.FA.10MalinkoiteNaBSiO4Hex. 6 : P63
9.FA.15VirgiliteLiAlSi2O6Hex. 6 2 2 : P62 2 2
9.FA.25LisitsyniteKBSi2O6Orth. 2 2 2 : P2 2 2
9.FA.30AdulariaKAlSi3O8Mon.
9.FA.30Anorthoclase(Na,K)AlSi3O8Tric.
9.FA.30Buddingtonite(NH4)(AlSi3)O8Mon. 2 : P21
9.FA.30CelsianBa(Al2Si2O8)Mon. 2/m
9.FA.30Hyalophane(K,Ba)[Al(Si,Al)Si2O8]Mon.
9.FA.30MicroclineK(AlSi3O8)Tric. 1
9.FA.30OrthoclaseK(AlSi3O8)Mon. 2/m : B2/m
9.FA.30SanidineK(AlSi3O8)Mon. 2/m : B2/m
9.FA.30RubiclineRb(AlSi3O8)Tric.
9.FA.30MonalbiteNaAlSi3O8Mon. 2/m : B2/m
9.FA.35AlbiteNa(AlSi3O8)Tric. 1
9.FA.35Andesine(Na,Ca)[Al(Si,Al)Si2O8]Tric.
9.FA.35AnorthiteCa(Al2Si2O8)Tric. 1 : P1
9.FA.35Bytownite(Ca,Na)[Al(Al,Si)Si2O8]Tric.
9.FA.35Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
9.FA.35Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
9.FA.35ReedmergneriteNaBSi3O8Tric.
9.FA.40ParacelsianBa(Al2Si2O8)Mon.
9.FA.45SvyatoslaviteCa(Al2Si2O8)Orth.
9.FA.45KumdykoliteNa(AlSi3O8)Orth. mmm (2/m 2/m 2/m) : Pnnm
9.FA.55LisetiteCaNa2Al4Si4O16Orth.
9.FA.60BanalsiteNa2BaAl4Si4O16Orth. mm2 : Iba2
9.FA.60StronalsiteNa2SrAl4Si4O16Orth.
9.FA.65DanburiteCaB2Si2O8Orth. mmm (2/m 2/m 2/m)
9.FA.65MaleeviteBaB2Si2O8Orth. mmm (2/m 2/m 2/m) : Pnma
9.FA.65PekoviteSrB2Si2O8Orth. mmm (2/m 2/m 2/m) : Pnma
9.FA.70Lingunite(Na,Ca)AlSi3O8Tet. 4/m : I4/m
9.FA.75KokchetaviteK(AlSi3O8)Hex. 6/mmm (6/m 2/m 2/m) : P6/mmm

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

76.1.5.1ParacelsianBa(Al2Si2O8)Mon.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

16.12.1StronalsiteNa2SrAl4Si4O16Orth.
16.12.3BrewsteriteMon.
16.12.4CelsianBa(Al2Si2O8)Mon. 2/m
16.12.5ParacelsianBa(Al2Si2O8)Mon.
16.12.6CymriteBaAl2Si2(O,OH)8 · H2OMon.
16.12.7EdingtoniteBa[Al2Si3O10] · 4H2OOrth. 2 2 2 : P21 21 21
16.12.8BanalsiteNa2BaAl4Si4O16Orth. mm2 : Iba2
16.12.9Harmotome(Ba0.5,Ca0.5,K,Na)5[Al5Si11O32] · 12H2OMon. 2/m : P21/m
16.12.10Hyalophane(K,Ba)[Al(Si,Al)Si2O8]Mon.
16.12.11BalipholiteBaLiMg2Al3(Si2O6)2(OH)4Orth.
16.12.12ArmeniteBaCa2Al6Si9O30 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pnna
16.12.13Wellsite(K,Ba,Ca,K2)Al2Si6O16 · 6H2OMon. 2/m : P21/m
16.12.14Merlinoite(K,Na)5(Ca,Ba)2Al9Si23O64 · 23H2OOrth.
16.12.15Anandite(Ba,K)(Fe2+,Mg)3((Si,Al,Fe)4O10)(S,OH)2Mon. 2/m : B2/b
16.12.16Fraipontite(Zn,Al)3((Si,Al)2O5)(OH)4Mon.
16.12.17SauconiteNa0.3Zn3((Si,Al)4O10)(OH)2 · 4H2OMon.
16.12.18Minehillite(K,Na)2-3Ca28Zn4Al4Si40O112(OH)16Hex.
16.12.19HendricksiteKZn3(Si3Al)O10(OH)2Mon. 2/m : B2/m
16.12.20Baileychlore(Zn,Fe2+,Al,Mg)6(Si,Al)4O10(OH)8Tric. 1

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 SlawsoniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Griffen D T, Ribbe P H, Gibbs G V (1977) The structure of slawsonite, a strontium analog of paracelsian. American Mineralogist 62:31-35
Hawthorne F C, Bladh K W, Burke E A J, Grew E S, Langley R H, Puciewicz J, Roberts A C, Schedler R A, Shigley J E, Vanko D A (1987) New mineral names. American Mineralogist 72: 225-226.
Tagai T, Hoshi T, Suzuki M, Kato A, Matsbara S (1995) A new modification of slawsonite, SrAl2Si2O8: its structure and phase transition. Zeitschrift für Kristallographie 210, 741-745

Internet Links for SlawsoniteHide

Localities for SlawsoniteHide

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.
Canada
 
  • Ontario
    • Thunder Bay District
      • Killala Lake Area
The Canadian Mineralogist Vol. 44, pp. 929-942 (2006)
Czech Republic
 
  • Central Bohemian Region
    • Beroun District
Tasáryová, Z., Frýda, J., Janoušek, V., & Racek, M. (2014). Slawsonite-celsian-hyalophane assemblage from a picrite sill (Prague Basin, Czech Republic). American Mineralogist, 99(11-12), 2272-2279.
  • Moravian-Silesian Region
    • Frýdek-Místek District
Matýsek, D. & Jirásek, J. (2016): Occurrences of Slawsonite In Rocks of the Teschenite Association In the Podbeskydí Piedmont Area (Czech Republic) and Their Petrological Significance. Canadian Mineralogist, 54, 1129-1146.
Matýsek, D. & Jirásek, J. (2016): Occurrences of Slawsonite In Rocks of the Teschenite Association In the Podbeskydí Piedmont Area (Czech Republic) and Their Petrological Significance. Canadian Mineralogist, 54, 1129-1146
    • Nový Jičín District
      • Bludovice
Matýsek, D. & Jirásek, J. (2016): Occurrences of Slawsonite In Rocks of the Teschenite Association In the Podbeskydí Piedmont Area (Czech Republic) and Their Petrological Significance. Canadian Mineralogist, 54, 1129-1146
Japan
 
  • Kochi Prefecture
    • Kochi City
      • Engyouji (Engyoji)
Komuro Minerals specimen; Yamada, S. (2004) Nihonsan-koubutsu Gojuon-hairetsu Sanchi-ichiranhyou (111 pp.)
      • Rendai
Mineralogical Journal Vol. 13 (1986) , No. 6 pp368-375
    • Konan City
Matsubara, S. (1985) Bulletin of the National Science Museum, 11, 37-95; Kato, A., & Matsubara, S. (1986) Slawsonite from Sarusaka, Kagami, Kochi Prefecture, Japan. Crystal Chemistry of Minerals. In Proc. 13th General Meeting of Intern. Assoc., Varna (pp. 595-605).
  • Niigata Prefecture
Miyajima, H. et al., abstract J038-003, in www-jm.eps.s.u-tokyo.ac.jp/ 2002cd-rom/pdf/j038/j038-003_e.pdf; Miyajima H (2014) Jadeitite from Itoigawa, Niigata Prefecture, central Japan. 21 st meeting of the International Mineralogical Association. p 200
Spain
 
  • Canary Islands
    • Las Palmas Province
Ковальчук, Н. С., & Шумилова, Т. Г. (2014). Редкоземельная и циРконий-ниобиевая минеРализация в алмазсодеРжащих каРбонатитах о. ФуэРтевентуРа (испания). Вестник института геологии Коми научного центра Уральского отделения РАН, (10 (238)).
USA
 
  • North Carolina
    • Alleghany Co.
      • Sparta
RocK H. Currier systematic species collection, donated to RRUFF.
  • Oregon
    • Wallowa Co.
Am Min 62:31-35; Hawthorne F C, Bladh K W, Burke E A J, Grew E S, Langley R H, Puciewicz J, Roberts A C, Schedler R A, Shigley J E, Vanko D A (1987) New mineral names. American Mineralogist 72, 222-230
  • Wyoming
    • Park Co.
      • Grand Canyon of the Yellowstone
Phillips, A. R., Larson, P. B., John, D. A., & Pauley, B. M. (2008, December). Hydrothermal Quartz Oxygen Isotope Ratios in Altered Post-Collapse Rhyolite at Sevenmile Hole, Grand Canyon of the Yellowstone River, Yellowstone National Park, WY. In AGU Fall Meeting Abstracts.
 
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