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CaAl2Si6O16 · 4H2O
Colourless, white, ...
Vitreous, Pearly
Member of:
Named after its discovery locality, Yugawara Hot Spring, Kanagawa Prefecture, Japan.

Classification of Yugawaralite

Approved, 'Grandfathered' (first described prior to 1959)

9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H2O; zeolite family
B : Chains of single connected 4-membered rings
Dana 7th ed.:

1 : Zeolite group - True zeolites

16 : Silicates Containing Aluminum and other Metals
9 : Aluminosilicates of Ca

Physical Properties of Yugawaralite

Vitreous, Pearly
Diaphaneity (Transparency):
Colourless, white, pinkish
Hardness (Mohs):
Indistinct on [010]

Optical Data of Yugawaralite

Biaxial (+)
RI values:
nα = 1.495 nβ = 1.497 nγ = 1.504
Measured: 78° , Calculated: 58°
Max Birefringence:
δ = 0.009
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:

Chemical Properties of Yugawaralite

CaAl2Si6O16 · 4H2O
IMA Formula:
Ca(Si6Al2)O16 · 4H2O
Elements listed in formula:
Common Impurities:

Crystallography of Yugawaralite

Crystal System:
Cell Parameters:
a = 6.72 Å, b = 13.98 Å, c = 10.05 Å
β = 111.52°
a:b:c = 0.481 : 1 : 0.719
Unit Cell Volume:
V 878.34 ų (Calculated from Unit Cell)
Crystals flat tabulkar parallel to {010}. Showing (100), (010), (001), (110), (120), (011) and (-111).
X-Ray Powder Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.
X-Ray Powder Diffraction Data:
3.057 (100)
4.672 (70)
4.652 (67)
5.81 (52)
7.01 (31)
3.237 (29)
4.295 (26)

Type Occurrence of Yugawaralite

General Appearance of Type Material:
A network of veins with well devloped crystals.
Place of Conservation of Type Material:
National Science Museum, Tokyo, Japan.
National School of Mines, Paris, France.
National Museum of Natural History, Washington, D.C., USA, 106164, 106931.
Geological Setting of Type Material:
Andesite tuff metamorphosed by hot spring action.
Associated Minerals at Type Locality:

Relationship of Yugawaralite to other Species

Member of:
Other Members of Group:
AlflarseniteNaCa2Be3Si4O13(OH) · 2H2O
AmiciteK2Na2Al4Si4O16 · 5H2O
AnalcimeNa(AlSi2O6) · H2O
Barrerite(Na,K,Ca0.5)2[Al2Si7O18] · 7H2O
Bellbergite(K,Ba,Sr)2Sr2Ca2(Ca,Na)4[Al3Si3O12]6 · 30H2O
BikitaiteLiAlSi2O6 · H2O
BoggsiteCa8Na3(Si,Al)96O192 · 70H2O
Brewsterite-Ba(Ba,Sr)[Al2Si6O16] · 5H2O
Brewsterite-Sr(Sr,Ba,Ca)[Al2Si6O16] · 5H2O
Chabazite-Levyne SubgroupA subgroup of the Zeolite Group.
ChiavenniteCaMnBe2Si5O13(OH)2 · 2H2O
ClinoptiloliteNote on the distinguishing differences between clinoptilolite and heulandite (hhttp://rruff.
CowlesiteCaAl2Si3O10 · 6H2O
Dachiardite-Ca(Ca,Na2,K2)5Al10Si38O96 · 25H2O
Dachiardite-Na(Na2,Ca,K2)5Al10Si38O96 · 25H2O
DirenzoiteNaK6MgCa2(Al13Si47O120) · 36H2O
EdingtoniteBa[Al2Si3O10] · 4H2O
EpistilbiteCaAl2Si6O16 · 5H2O
ErioniteThis name now refers to a group of related minerals.
Faujasite SubgroupA subgroup of the Zeolite Group.
FerrieriteZeolite Group.
FerrochiavenniteCa1-2Fe[(Si,Al,Be)5Be2O13(OH)2] · 2H2O
Flörkeite(K3Ca2Na)[Al8Si8O32] · 12H2O
Garronite-CaNa2Ca5Al12Si20O64 · 27H2O
GaultiteNa4Zn2Si7O18 · 5H2O
Gismondine-BaBa2Al4Si4O16 · 4-6H2O
Gismondine-CaCaAl2Si2O8 · 4H2O
GmeliniteIn 1997, gmelinite was split into Gmelinite-Ca, Gmelinite-Na and Gmelinite-K.
GobbinsiteNa5(Si11Al5)O32 · 11H2O
GoosecreekiteCa[Al2Si6O16] · 5H2O
GottardiiteNa3Mg3Ca5Al19Si117O272 · 93H2O
Harmotome(Ba0.5,Ca0.5,K,Na)5[Al5Si11O32] · 12H2O
HeulanditeNote on the distinguishing differences between heulandite and clinoptilolite (http://rruff.
LaumontiteCaAl2Si4O12 · 4H2O
LovdariteK2Na6Be4Si14O36 · 9H2O
MaricopaitePb7Ca2(Si,Al)48O100 · 32H2O
Mazzite-Mg(Mg,K,Ca)5(Si26Al10)O72 · 28H2O
Mazzite-NaNa8[Al4Si14O36]2 · 30H2O
Merlinoite(K,Na)5(Ca,Ba)2Al9Si23O64 · 23H2O
Montesommaite(K,Na)9Al9Si23O64 · 10H2O
Mordenite(Na2,Ca,K2)Al2Si10O24 · 7H2O
MutinaiteNa3Ca4Si85Al11O192 · 60H2O
NabesiteNa2BeSi4O10 · 4H2O
Natrolite SubgroupA subgroup of the Zeolite Group.
OffretiteKCaMg(Si13Al5)O36 · 15H2O
PahasapaiteLi8(Ca,Li,K)10.5Be24(PO4)24 · 38H2O
ParthéiteCa2(Si4Al4) O15 (OH)2•4H2O
Paulingite-Ca(Ca,K,Na,Ba,◻)10 (Si, Al)42O84•34H2O
Paulingite-K(K2,Ca,Na2,Ba)5[Al10Si35O90] · 45H2O
Paulingite-Na(Na2,K2,Ca,Ba)5[Al10Si35O90] · 45H2O
PerlialiteK9Na(Ca,Sr)[Al2Si4O12]6 · 15H2O
PhillipsiteZeolite Group.
Pollucite(Cs,Na)2(Al2Si4O12) · 2H2O
RoggianiteCa2Be(OH)2Al2Si4O13 · 2.5H2O
StelleriteCa4(Si28Al8)O72 · 28H2O
Stilbite-CaNaCa4[Al9Si27O72] · nH2O
Stilbite-Na(Na,Ca,K)6-7[Al8Si28O72] · nH2O
Terranovaite(Na,Ca)8(Si68Al12)O160 · 29H2O
Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
Thomsonite-SrNa(Sr,Ca)2[Al5Si5O20] · 7H2O
Tschernichite(Ca,Na2)[Al2Si4O12] · 4-8H2O
TschörtneriteCa4(Ca,Sr,K,Ba)3Cu3[(OH)2|Al3Si3O12]4 · nH2O
WairakiteCa(Al2Si4O12) · 2H2O
WeinebeneiteCaBe3(PO4)2(OH)2 · 4H2O
Wenkite(Ba,K)4(Ca,Na)6[(SO4)3|(Si,Al)20O39(OH)2] · 0.5H2O
WillhendersoniteKCa[Al3Si3O12] · 5H2O
9.GB.05AnalcimeNa(AlSi2O6) · H2O
9.GB.05LithositeK6Al4Si8O25 · 2H2O
9.GB.05Pollucite(Cs,Na)2(Al2Si4O12) · 2H2O
9.GB.05WairakiteCa(Al2Si4O12) · 2H2O
9.GB.10LaumontiteCaAl2Si4O12 · 4H2O
9.GB.20RoggianiteCa2Be(OH)2Al2Si4O13 · 2.5H2O
9.GB.25GoosecreekiteCa[Al2Si6O16] · 5H2O
9.GB.30Montesommaite(K,Na)9Al9Si23O64 · 10H2O
9.GB.35ParthéiteCa2(Si4Al4) O15 (OH)2•4H2O
16.9.18LawsoniteCaAl2(Si2O7)(OH)2 · H2O
16.9.19ParthéiteCa2(Si4Al4) O15 (OH)2•4H2O
16.9.20WairakiteCa(Al2Si4O12) · 2H2O
16.9.21VertumniteCa4Al4Si4O6(OH)24 · 3H2O
16.9.22ScoleciteCaAl2Si3O10 · 3H2O
16.9.23LaumontiteCaAl2Si4O12 · 4H2O
16.9.25Gismondine-CaCaAl2Si2O8 · 4H2O
16.9.26EpistilbiteCaAl2Si6O16 · 5H2O
16.9.27GoosecreekiteCa[Al2Si6O16] · 5H2O
16.9.28CowlesiteCaAl2Si3O10 · 6H2O
16.9.30StelleriteCa4(Si28Al8)O72 · 28H2O
16.9.31SträtlingiteCa2Al2SiO7 · 8H2O
16.9.32AmstalliteCaAl(Si,Al)4O8(OH)4 · (H2O,Cl),Sr)[Al2Si6O16] · 5H2O

Other Names for Yugawaralite

Name in Other Languages:

Other Information

Other Information:
Not attacked by hot or cold hydrochloric acid.
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 Yugawaralite

Reference List:
Sakurai, K., Hayashi, A. (1952) “Yugawaralite”, a new zeolite. Science Reports of the Yokohama National University: 1: 69-77.

Fleischer, M. (1953) New mineral names. American Mineralogist: 38: 426-426.

Leimer, H.W., Slaughter, M. (1969) The determination and refinement of the crystal structure of yugawaralite. Zeitschrift für Kristallographie: 130: 88-111.

Eberlein, G.D., Erd, R.C., Weber, F., Beatty, L.B. (1971) New occurrence of yugawaralite from the Chena Hot Springs area, Alaska. American Mineralogist: 56: 1699-1717.

Pongiluppi, D. (1977) A new occurrence of yugawaralite at Osilo, Sardinia. The Canadian Mineralogist: 15: 113-114.

Wise, W.S. (1978) Yugawaralite from Bombay, India. Mineralogical Record: 9: 296.

Akizuki, M. (1987) An explanation of the optical variation in yugawaralite. Mineralogical Magazine: 51: 615-620.

Kvick, Å., Artioli, G., Smith, J.V. (1986) Neutron diffraction study of the zeolite yugawaralite at 13 K. Zeitschrift für Kristallographie: 174: 265-281.

Coombs, D.S., Alberti, A., Armbruster, T., Artioli, G., Colella, C., Galli, E., Grice, J.D., Liebau, F., Mandarino, J.A., Minato, H., Nickel, E.H., Passaglia, E., Peacor, D.R., Quartieri, S., Rinaldi, R., Ross, M., Sheppard, R.A., Tillmanns, E., Vezzalini, G. (1997) Recommended nomenclature for zeolite minerals: report of the Subcommittee on Zeolites of the International Mineralogical Association, Commission on New Minerals and Mineral Names. The Canadian Mineralogist: 35: 1571-1606.

Mandarino, J.A. (1999) The Zeolite Group. Mineralogical Record: 30: 5-6.

Weisenberger, T., Selbekk, R.S. (2009) Multi stage zeolite facies mineralization in the Hvalfjordur area, Iceland. International Journal of Earth Sciences: 98(5): 985-999.

Tanaka, T., Kimura, R., Akizuki, M., Kudoh, Y. (2002) Origin of low-symmetry growth sectors in edingtonite and yugawaralite, and crystal structure of the k{011} and v{120} sectors of yugawaralite. Mineralogical Magazine: 66: 409-420.

Fois, E., Gamba, A., Tabacchi, G., Arletti, R., Quartieri, S., Vezzalini, G. (2005) The "template" effect of the extra-framework content on zeolite compression: the case of yugawaralite. American Mineralogist: 90: 28-35.

Internet Links for Yugawaralite URL:
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Localities for Yugawaralite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
  • Neuquén
    • Huiliches department
R. S. Bowman and S. E. Delap (Eds.) Zeolite ’06—7th International Conference on the Occurrence, Properties, and Utilization of Natural Zeolites Socorro, New Mexico USA, 16–21 July 2006 p. 242
    • Lácar department
      • Caleufú
Pablo Rodrigo Leal, María Elena Vattuone, and Carlos Oscar Latorre (2011) Zeolite assemblages from Northern Patagonian Andes, Argentina: A review. Revista Mexicana de Ciencias Geológicas, v.28, núm. 2, 2011, p. 212-225
  • Salta
    • Los Andes department
      • El Quevar mining district
ROBL, Klaus; BRODTKORB, Milka and AMETRANO, Silvia. The Miocene epithermal mineralization of the Quevar Stratovolcan Complex, Salta. Rev. Asoc. Geol. Argent. [online]. 2009, vol.64, n.3, pp. 525-539.
  • British Columbia
    • Osoyoos Mining Division
      • Olalla
Tschernich, R. (1992): Zeolites of the World, p.51,524
  • Csongrád Co.
    • Great Hungarian Plain
      • Üllés
  • Capital Region
[MinRec 17:340, 18:437-438]
Weisenberger, T. & Selbekk, R.S. (2009): Multi stage zeolite facies mineralization in the Hvalfjordur area, Iceland. International Journal of Earth Sciences. 98 (5), 985-999
Multi-stage zeolite facies mineralization in the Hvalfjo¨rdur area,
  • Western Region
    • Hvalfjordur
Tschernich, R. W. (1992): Zeolites of the world. Geoscience Press, Phoenix, Arizona. [p.524]
    • Mýrasýsla
      • Norðurárdalur
        • Haugar
Self collected by Jamison Turnbull
Personal collection of Jamison K Turnbull.
[MinRec 12:21]
  • Maharashtra
    • Mumbai District (Bombay District)
Rob Lavinsky
      • Mumbai (Bombay)
        • Ward 38
          • Malad
Mineralogical Record, 9:296
Wise, W.S. (1978): Yugawaralite from Bombay, India. Mineralogical Record 9 (5): 296; No reference listed
    • Nashik District (Nasik District)
      • Sinnar
Collection Elmar Lackner (and many others).
  • Lombardy
    • Sondrio Province
      • Valchiavenna
        • Novate Mezzola
          • Codera Valley
Ghizzoni, S. & Mazzoleni, G. (2005): Itinerari mineralogici in val Codera. Geologia Insubrica, Ed., Milano, 316 pp.
Ghizzoni, S. & Mazzoleni, G. (2005): Itinerari mineralogici in val Codera. Geologia Insubrica, Ed., Milano, 316 pp.
  • Sardinia
    • Sassari Province
      • Osilo
Gelosa, M. & Mameli, P. (1999): I minerali delle cave di Osilo: località mineralogiche della Sardegna. Rivista Mineralogica Italiana, 2/1999, 92-96.
  • Veneto
    • Verona province
      • Vestenanuova
M.Mattioli, M.Cenni, G.Raffaelli (2008): I Minerali del Veronese - Le mineralizzazioni secondarie delle rocce vulcaniche dei Monti Lessini. Memorie del Museo Civico di Storia Naturale di Verona, II° serie - sezione Scienze della Terra 7 - 2008, 196
  • Hokkaido
    • Tokachi Province
      • Obihiro City
Hiroshi KONNO and Morihiro AOKI (1977): Yugawaralite from Nukabira, Hokkaido. Mineralogical Journal, 8, 456-462.
  • Honshu Island
    • Chubu Region
      • Shizuoka Prefecture
        • Toi-cho
[MinRec 8:517]; Yamada, S. (2004) Nihonsan-koubutsu Gojuon-hairetsu Sanchi-ichiranhyou (111 pp.)
    • Kanto Region
      • Kanagawa Prefecture
        • Yugawara
Sci.Rep. Yokohama Nat.Univ.(1952) sect. 2, no. 1, 69-77
    • Tohoku Region
      • Aomori Prefecture
        • Kuroishi City
Onuki et al (1988) Journal of Mineralogy, Petrology and Economic Geology, 83, 311-317.
      • Miyagi Prefecture
Seki, Y. and Okumura, K. (1968) Yugawaralite from Onikobe active geothermal area, Northeast Japan. Jour. Japan. Assoc. Min. Pet. Economic Geology, 60, #1, 27-33.; Yotaro Seki (1973) Distribution and Modes of Occurrence of Wairakites in the Japanese Island Arc The Journal of the Geological Society of Japan 79:521-527
  • Irbid
Khoury, H. N., Salameh, E., & Abdul-Jaber, Q. (1985). Characteristics of an unusual highly alkaline water from the Maqarin area, northern Jordan. Journal of Hydrology, 81(1), 79-91.
New Zealand
  • South Island
    • Southland
Railton, G.L. et al (1990)
Réunion Island
  • Piton des Neiges Massif
DE ASCENCAO GUEDES R. (2004) A vos loupes n°2 : la yugawaralite, Le Règne minéral, 59, 42-45. (in French)
      • Cilaos
Serge Lavarde Collection
  • Crimea Oblast'
World of Stones v.9
Tischenko A. data
  • Alaska
    • Aleutians East Borough
      • Unalaska Island
    • Fairbanks North Star Borough
      • Chena River
Tom Moore, "What's New in Minerals: Tuscon Show 2000" Mineralogical Record, May/June 2000.
Eberling, G. D., R. C. Erd, Florence Weber, and L. B. Beatty. "New Occurrence of Yugawaralite From the Chena Hot Springs Area, Alaska." The American Mineralogist 56 (1971): 1699-1715. 31 Dec. 2007.
  • Washington
    • Cowlitz Co.
      • Wolf Point
Micro Probe Vol. 7 No. 10
Micro Probe; Volume 1X, Number 1, pgs 2-6
  • Wyoming
    • Park Co.
Bargar, K.E.; Beeson, M.H. & Keith, T.E.C. (1981): Zeolites in Yellowstone National Park. Mineralogical Record 12, 29-38
[MinRec 12:34-35]
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