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Howieite

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01414440014948833004771.jpg
Howieite

New Covelo Road roadcuts, North of Longvale, Longvale, Coastal Range, Mendocino Co., California, USA
04821430014977223226594.jpg
Howieite

Laytonville, Coastal Range, Mendocino Co., California, USA
06300970014976787018570.jpg
Howieite

Laytonville, Coastal Range, Mendocino Co., California, USA
01414440014948833004771.jpg
Howieite

New Covelo Road roadcuts, North of Longvale, Longvale, Coastal Range, Mendocino Co., California, USA
06691200014948315444372.jpg
Howieite

Laytonville, Coastal Range, Mendocino Co., California, USA
08924680014961070135775.jpg
Howieite

Laytonville, Coastal Range, Mendocino Co., California, USA
01414440014948833004771.jpg
Howieite

New Covelo Road roadcuts, North of Longvale, Longvale, Coastal Range, Mendocino Co., California, USA
04821430014977223226594.jpg
Howieite

Laytonville, Coastal Range, Mendocino Co., California, USA
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About HowieiteHide

Formula:
Na(Fe,Mn)10(Fe,Al)2Si12O31(OH)13
Crystal System:
Triclinic
Name:
Named by Stewart Olof Agrell, Michael G. Bown, and Duncan McKie in 1964 in honour of Prof. Robert Andrew Howie (4 June 1923, Olney, Buckinghamshire, England, UK - 10 March 2012, Derby, England, UK), British petrologist and mineralogist of King's College, London University, United Kingdom. Prof. Howie was one of the authors of the Rock-Forming Minerals book series (Deer, Howie and Zussman).
This page provides mineralogical data about Howieite.


Classification of HowieiteHide

IMA status:
Approved
Approval year:
1964
Strunz 8th ed.:
8/F.16-20
Nickel-Strunz 10th (pending) ed.:
9.DH.65

9 : SILICATES (Germanates)
D : Inosilicates
H : Inosilicates with 4-periodic single chains, Si4O12
Dana 8th ed.:
69.2.3.1

69 : INOSILICATES Chains with Side Branches or Loops
2 : Chains with Side Branches or Loops with P>2
Hey's CIM Ref.:
16.16.13

16 : Silicates Containing Aluminum and other Metals
16 : Aluminosilicates of Mn

Optical Data of HowieiteHide

Type:
Biaxial (-)
RI values:
nα = 1.701 nβ = 1.720 nγ = 1.734
2V:
Measured: 65° , Calculated: 80°
Max Birefringence:
δ = 0.033
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
weak

Chemical Properties of HowieiteHide

Formula:
Na(Fe,Mn)10(Fe,Al)2Si12O31(OH)13
IMA Formula:
Na(Fe2+,Fe3+,Al,Mg)12(Si6O17)2(O,OH)10
Elements listed:
Al, Fe, H, Mg, Na, O, Si - search for minerals with similar chemistry
Common Impurities:
Ca,Mg,Ti

Crystallography of HowieiteHide

Crystal System:
Triclinic
Cell Parameters:
a = 10.17 Å, b = 9.72 Å, c = 9.56 Å
α = 91.3°, β = 70.7°, γ = 109°
Ratio:
a:b:c = 1.046 : 1 : 0.984
Unit Cell V:
839.50 ų (Calculated from Unit Cell)

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0000396HowieiteWenk H R (1974) Howieite, a new type of chain silicate American Mineralogist 59 86-9719740293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

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Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Geological EnvironmentHide

Geological Setting:
Iron-rich metasediments from the blueschist facies of metamorphism.

Type Occurrence of HowieiteHide

Synonyms of HowieiteHide

Other Language Names for HowieiteHide

German:Howieit
Russian:Хауиит
Spanish:Howieita

Relationship of Howieite to other SpeciesHide

Member of:
Deerite-Howieite Group
Other Members of this group:
Deerite(Fe,Mn)6(Fe,Al)3[Si6O17]O3(OH)5Mon.
JohninnesiteNa2Mn2+9Mg7(OH)8[AsO4]2[Si6O17]2Tric.
Taneyamalite(Na,Ca)(Mn,Mg,Fe)12Si12(O,OH)44Tric.

Common AssociatesHide

Associated Minerals Based on Photo Data:
2 photos of Howieite associated with ZussmaniteK(Fe,Mg,Mn)13(Si,Al)18O42(OH)14
1 photo of Howieite associated with Pumpellyite-(Mg)Ca2MgAl2[Si2O6OH][SiO4](OH)2(OH)

Related Minerals - Nickel-Strunz GroupingHide

9.DH.BavsiiteBa2V2O2[Si4O12]Tet. 4/m : I4/m
9.DH.05LeucophaniteNaCaBeSi2O6FOrth. 2 2 2 : P21 21 21
9.DH.10OhmiliteSr3(Ti,Fe3+)(Si4O12)(O,OH) · 2-3H2OMon.
9.DH.15HaradaiteSrVSi2O7Orth.
9.DH.15SuzukiiteBaVSi2O7Orth.
9.DH.20BatisiteBaNaNaTi2(Si4O12)O2Orth.
9.DH.20Shcherbakovite(K,Ba)KNa(Ti,Nb)2(Si4O12)O2Orth.
9.DH.25TaikaniteSr3BaMn2+2(Si4O12)O2Mon.
9.DH.30KrauskopfiteBaSi2O5 · 3H2OMon.
9.DH.35Balangeroite(Mg,Fe2+,Fe3+,Mn2+)42Si16O54(OH)40Mon.
9.DH.35GageiteMn21(Si4O12)2O3(OH)20Mon. 2/m
9.DH.40AenigmatiteNa4[Fe2+10Ti2]O4[Si12O36]Tric. 1 : P1
9.DH.40DorriteCa4(Mg3Fe3+9)O4(Si3Al8Fe3+O36)Tric.
9.DH.40HøgtuvaiteCa4[Fe2+6Fe3+6]O4[Si8Be2Al2O36]Tric. 1 : P1
9.DH.40KrinoviteNa2Mg4Cr3+2(Si6O18)O2Tric.
9.DH.40Makarochkinite(Ca,Na)4[Fe2+8Fe3+2Ti2]O4[Si8Be2Al2O36]Tric. 1 : P1
9.DH.40RhöniteCa4[Mg8Fe3+2Ti2]O4[Si6Al6O36]Tric. 1 : P1
9.DH.40SerendibiteCa4[Mg6Al6]O4[Si6B3Al3O36]Tric. 1 : P1
9.DH.40WelshiteCa4Mg9Sb3O4[Si6Be3AlFe2O36]Tric. 1 : P1
9.DH.40WilkinsoniteNa2Fe2+4Fe3+2(Si6O18)O2Tric. 1 : P1
9.DH.45SapphirineMg4(Mg3Al9)O4[Si3Al9O36]Mon. 2/m : P21/b
9.DH.50Khmaralite(Mg,Al,Fe)16[(Al,Si,Be)12O36]O4Mon. 2/m : P21/b
9.DH.55Surinamite(Mg,Fe)3Al4BeSi3O16Mon.
9.DH.60Deerite(Fe,Mn)6(Fe,Al)3[Si6O17]O3(OH)5Mon.
9.DH.65Taneyamalite(Na,Ca)(Mn,Mg,Fe)12Si12(O,OH)44Tric.
9.DH.70JohninnesiteNa2Mn2+9Mg7(OH)8[AsO4]2[Si6O17]2Tric.
9.DH.75AgrelliteNaCa2Si4O10FTric.

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

69.2.3.2Taneyamalite(Na,Ca)(Mn,Mg,Fe)12Si12(O,OH)44Tric.
69.2.3.3Deerite(Fe,Mn)6(Fe,Al)3[Si6O17]O3(OH)5Mon.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

16.16.1KanonaiteMn3+Al(SiO4)OOrth. mmm (2/m 2/m 2/m) : Pnnm
16.16.2SpessartineMn2+3Al2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
16.16.3DavreuxiteMnAl6Si4O17(OH)2Mon.
16.16.4SursassiteMn2+2Al3(SiO4)(Si2O7)(OH)3Mon. 2/m : P21/m
16.16.5CarpholiteMn2+Al2(Si2O6)(OH)4Orth.
16.16.6KellyiteMn2+2Al(AlSiO5)(OH)4Hex. 6 : P63
16.16.7PennantiteMn2+5Al(AlSi3O10)(OH)8Tric.
16.16.8AkatoreiteMn2+9Al2Si8O24(OH)8Tric.
16.16.9Ganophyllite(K,Na,Ca)2Mn8(Si,Al)12(O,OH)32 · 8H2OMon.
16.16.10Mangano-ferri-eckermannite{Na}{Na2}{Mn2+4Fe3+}Si8O22(OH)2Mon.
16.16.11Masutomilite(K,Rb)(Li,Mn3+,Al)3(AlSi3O10)(F,OH)2Mon.
16.16.14Eggletonite(Na,K,Ca)2(Mn,Fe)8(Si,Al)12O29(OH)7 · 11H2OMon.
16.16.15Bannisterite(Ca,K,Na)(Mn2+,Fe2+)10(Si,Al)16O38(OH)8 · nH2OMon. 2/m : B2/b
16.16.16Taneyamalite(Na,Ca)(Mn,Mg,Fe)12Si12(O,OH)44Tric.
16.16.17ZussmaniteK(Fe,Mg,Mn)13(Si,Al)18O42(OH)14Trig. 3 : R3
16.16.18CoombsiteKMn2+13(Si,Al)18O42(OH)14Trig.
16.16.19HenritermieriteCa3Mn3+2(SiO4)2[◻(OH)4]Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
16.16.20MacfalliteCa2Mn3+3(SiO4)(Si2O7)(OH)3Mon.
16.16.21Ottrélite(Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2Mon.
16.16.22Piemontite{Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
16.16.23OkhotskiteCa2Mn2+Mn3+2[Si2O6OH][SiO4](OH)2(OH)Mon.
16.16.24Pumpellyite-(Mn2+)Ca2Mn2+Al2[Si2O6OH][SiO4](OH)2(OH)Mon.
16.16.25Piemontite-(Sr){CaSr}{Al2Mn3+}(Si2O7)(SiO4)O(OH)Mon.

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 HowieiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Agrell, S.O. (1964) Deerite, howieite, and zussmanite, three new minerals from the Franciscan of the Laytonville district, Mendocino County, California (title only): American Mineralogist: 49.
Agrell, S.O., M.G. Bown & McKie (1965), Deerite, howieite and zussmanite, three new minerals from the Franciscan of the Laytonville district, Mendocino County, California: American Mineralogist: 50: 278.
Boerner, U. (1969), Deerit, Howieit und Zussmanit, neue seltene Mineralien von einen Steinbruch bei Laytonville in Nord-Kalifornien: Aufschluss: 20: 338-341.
Wenk, H.R. (1974) Howieite, a new type of chain silicate. American Mineralogist: 59: 86-97.

Internet Links for HowieiteHide

Localities for HowieiteHide

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
 
  • British Columbia
    • Omineca Mining Division
      • Pinchi Lake
Ghent, E.D., Stout, M.Z., erdmer, P. (1990) Howieite in blueschists, Pinchi Lake, British Columbia. Canadian Mineralogist, 28, 855-858.
Japan
 
  • Kochi Prefecture
    • Agawa District
      • Ino
Royal Ontario Museum specimen; Yamada, S. (2004) Nihonsan-koubutsu Gojuon-hairetsu Sanchi-ichiranhyou (111 pp.)
    • Kochi City
Matsubara, S. & Kato, A. (1989) Manganbabingtonite from Mitani, Kochi City, Japan. Bulletin of the National Science Museum (Tokyo), 15, #3, 81-89.
  • Kumamoto Prefecture
    • Yatsushiro City
      • Toyo
Wood, R. W. (1979) The iron-rich blueschist facies minerals: 2. Howieite. Mineralogical Magazine 43:363-370; from: Aoki, Y. and Isono K., (1968) J. Geol. Soc. Jap. 74, 136.
Kosovo
 
  • Ferizaj District
    • Štrpce (Shtërpcë)
 Wood, R. W. (1979) The iron-rich blueschist facies minerals: 2. Howieite. Mineralogical Magazine 43:363-370.
USA (TL)
 
  • California
    • Mendocino Co.
      • Coastal Range
        • Laytonville
Agrell, S.O. (1964), Deerite, howieite, and zussmanite, three new minerals from the Franciscan of the Laytonville district, Mendocino County, California (title only), Am.Min.: 49; CM 28 (1990), 855; HB2/1 (1995); Wood, R. W. (1979) The iron-rich blueschist facies minerals: 2. Howieite. Mineralogical Magazine 43:363-370.; Robert Muir Wood (1982) The Laytonville Quarry (Mendocino County California) Exotic Block: Iron-rich Blueschist-Facies Subduction-Zone Metamorphism. Mineralogical Magazine 45:87-99.
        • Longvale
          • North of Longvale
RRUFF specimen
Anonymous (1964), Three new minerals from California (deerite, howieite, and zussmanite): California Division of Mines and Geology, Mineral Information Service: 17: 138; USGS MRDS database (2005), loc. file ID #10286314 & 10031493.
        • Round Valley
Wood, R. W. (1979) The iron-rich blueschist facies minerals: 2. Howieite. Mineralogical Magazine 43:363-370.
    • Merced Co.
 Wood, R. W. (1979) The iron-rich blueschist facies minerals: 2. Howieite. Mineralogical Magazine 43:363-370.
    • San Benito Co.
 Wood, R. W. (1979) The iron-rich blueschist facies minerals: 2. Howieite. Mineralogical Magazine 43:363-370.
    • Santa Clara Co.
      • Black Wonder Mining District
        • Sugarloaf Mountain
Erd, R.C. and Y. Ohashi (1981) Santaclaraite, a new manganese silicate from California, American Mineralogist; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 414; American Mineralogist (1984): 69: 200-206.
Wood, R. W. (1979) The iron-rich blueschist facies minerals: 2. Howieite. Mineralogical Magazine 43:363-370.
    • Sonoma Co.
      • Coast Range
        • Cazadero
Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 433, 493.
Wood, R. W. (1979) The iron-rich blueschist facies minerals: 2. Howieite. Mineralogical Magazine 43:363-370.
        • Russian River Mining District
Wood, R. W. (1979) The iron-rich blueschist facies minerals: 2. Howieite. Mineralogical Magazine 43:363-370.
  • Oregon
    • Coos Co.
Handbook of Mineralogy; Wood, R. W. (1979) The iron-rich blueschist facies minerals: 2. Howieite. Mineralogical Magazine 43:363-370.; Robert Muir Wood (1982) The Laytonville Quarry (Mendocino County California) Exotic Block: Iron-rich Blueschist-Facies Subduction-Zone Metamorphism. Mineralogical Magazine 45:87-99.
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