Log InRegister
Quick Links : The Mindat ManualThe Rock H. Currier Digital LibraryMindat Newsletter [Free Download]
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsThe Rock H. Currier Digital LibraryGeologic Time
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsClubs & OrganizationsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral Quiz
Photo SearchPhoto GalleriesSearch by ColorNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Howieite

A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
Hide all sections | Show all sections

About HowieiteHide

Formula:
Na(Fe,Mn)10(Fe,Al)2Si12O31(OH)13
Colour:
Dark green to black.
Lustre:
Greasy
Specific Gravity:
3.378
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.


Unique IdentifiersHide

Mindat ID:
1935
Long-form identifier:
mindat:1:1:1935:0
GUID
(UUID V4):
352027fa-1900-4e02-8536-df3d8f8a31c4

IMA Classification of HowieiteHide

Classification of HowieiteHide

9.DH.65

9 : SILICATES (Germanates)
D : Inosilicates
H : Inosilicates with 4-periodic single chains, Si4O12
69.2.3.1

69 : INOSILICATES Chains with Side Branches or Loops
2 : Chains with Side Branches or Loops with P>2
16.16.13

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

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

SymbolSourceReference
HwIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
HwWhitney & Evans (2010)Whitney, D.L. and Evans, B.W. (2010) Abbreviations for names of rock-forming minerals. American Mineralogist, 95, 185–187 doi:10.2138/am.2010.3371

Physical Properties of HowieiteHide

Greasy
Transparency:
Transparent, Translucent
Colour:
Dark green to black.
Cleavage:
Distinct/Good
Good on {010}, fair on {100}, poor on {210}.
Density:
3.378 g/cm3 (Measured)    3.34 g/cm3 (Calculated)

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
Pleochroism:
Visible
Comments:
X = golden; Y = dark lilac gray; Z = green.

Chemistry of HowieiteHide

Mindat Formula:
Na(Fe,Mn)10(Fe,Al)2Si12O31(OH)13
Common Impurities:
Ca,Mg,Ti

Crystallography of HowieiteHide

Crystal System:
Triclinic
Cell Parameters:
a = 10.170(4) Å, b = 9.774(4) Å, c = 9.589(4) Å
α = 91.225°, β = 70.765°, γ = 108.09(5)°
Ratio:
a:b:c = 1.041 : 1 : 0.981
Unit Cell V:
851.98 ų (Calculated from Unit Cell)
Z:
1
Morphology:
bladed crystals, to 1 cm; in plumose aggregates and rosettes
Comment:
Point Group: 1 or 1; Space Group: P1 or P1.

Crystal StructureHide

Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File    Best | x | y | z | a | b | c
Rotation
Stop | Start
Labels
Console Off | On | Grey | Yellow
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

Image Loading

Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.
Powder Diffraction Data:
d-spacingIntensity
9.18 Å(100)
7.91 Å(80)
3.25 Å(65)
2.62 Å(60)
2.68 Å(45)
2.78 Å(40)
3.06 Å(35)

Geological EnvironmentHide

Paragenetic Mode(s):
Geological Setting:
Iron-rich metasediments from the blueschist facies of metamorphism.

Type Occurrence of HowieiteHide

Place of Conservation of Type Material:
National Museum of Natural History, Washington, D.C., USA, 109453, 144184; The Natural History Museum, London, England, 1964,544.
Associated Minerals at Type Locality:
Reference:
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.

Synonyms of HowieiteHide

Other Language Names for HowieiteHide

German:Howieit
Russian:Хауиит
Spanish:Howieita

Relationship of Howieite to other SpeciesHide

Other Members of this group:
Deerite(Fe,Mn)6(Fe,Al)3[Si6O17]O3(OH)5Mon. 2/m : P21/b
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 SpessartineMn2+3Al2(SiO4)3
1 photo of Howieite associated with Pumpellyite-(Mg)Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
1 photo of Howieite associated with PyriteFeS2
1 photo of Howieite associated with Riebeckite◻[Na2][Fe2+3Fe3+2]Si8O22(OH)2
1 photo of Howieite associated with Stilpnomelane(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O

Related Minerals - Strunz-mindat GroupingHide

9.DH.Gageite-2M(Mn,Mg,Zn)42Si16O54(OH)40Mon. 2/m
9.DH.BavsiiteBa2V2O2[Si4O12]Tet. 4/m : I4/m
9.DH.DevilliersiteCa4Ca2Fe3+10O4[(Fe3+10Si2)O36]Tric. 1 : P1
9.DH.YuzuxiangiteSr3Fe3+(Si2O6)2(OH) · 3H2OMon. 2/m : P21/m
9.DH.LouisfuchsiteCa2(Mg4Ti2)(Al4Si2)O20Tric. 1 : P1
9.DH.05LeucophaniteNaCaBeSi2O6FOrth. 2 2 2 : P21 21 21
9.DH.10OhmiliteSr3(Ti,Fe3+)(Si4O12)(O,OH) · 2-3H2OMon. 2/m : P21/m
9.DH.15HaradaiteSrVSi2O7Orth. mmm (2/m 2/m 2/m)
9.DH.15SuzukiiteBaVSi2O7Orth.
9.DH.20BatisiteBaNaNaTi2(Si4O12)O2Orth. mmm (2/m 2/m 2/m) : Imma
9.DH.20Shcherbakovite(K,Ba)KNa(Ti,Nb)2(Si4O12)O2Orth. mmm (2/m 2/m 2/m) : Imma
9.DH.20NoonkanbahiteBaKNaTi2(Si4O12)O2Orth. mmm (2/m 2/m 2/m) : Imma
9.DH.25TaikaniteSr3BaMn2+2(Si4O12)O2Mon. 2 : B2
9.DH.30KrauskopfiteBaSi2O5 · 3H2OMon. 2/m : P21/b
9.DH.35Balangeroite(Mg,Fe2+,Fe3+,Mn2+)42Si16O54(OH)40Mon. 2/m
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. 1 : P1
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.40LeucorhöniteCa2(Mg,Fe3+,Al)6(Si,Al)6O20Tric.
9.DH.40KuratiteCa2(Fe2+5Ti)O2[Si4Al2O18]Tric. 1 : P1
9.DH.40KhesiniteCa4(Mg3Fe3+9)O4(Fe3+9Si3)O36Tric. 1 : P1
9.DH.40UM1991-29-SiO:FeMgNaNa4(Mg5Fe3+7)O4[Si9Fe3+3O36]
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. 2/m
9.DH.55UM1988-26-SiO:AlMgMg4Al2O[Si3Al2O15]
9.DH.60Deerite(Fe,Mn)6(Fe,Al)3[Si6O17]O3(OH)5Mon. 2/m : P21/b
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. 1 : P1

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.

Internet Links for HowieiteHide

References 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 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). 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Canada
 
  • British Columbia
    • Omineca Mining Division
      • Pinchi Lake
Ghent et al. (1990)
Japan
 
  • Kochi Prefecture
    • Agawa District
      • Ino
Royal Ontario Museum specimen +1 other reference
    • Kochi City
Matsubara et al. (1989)
  • Kumamoto Prefecture
    • Yatsushiro City
      • Toyo
from: Aoki et al. (1968) +1 other reference
Kosovo
 
  • Ferizaj District
    • Štrpce (Shtërpcë)
Wood (1979)
USA (TL)
 
  • California
    • Mendocino County
      • Coastal Range
        • Laytonville
Agrell (1964) +4 other references
        • Longvale
          • North of Longvale
RRUFF specimen
Anonymous (1964) +1 other reference
        • Round Valley
Wood (1979)
    • Merced County
Wood (1979)
    • San Benito County
Wood (1979)
    • Santa Clara County
      • Black Wonder Mining District
        • Sugarloaf Mountain
Van Nostrand Reinholt Press: 414. +2 other references
Wood (1979)
    • Sonoma County
      • Coast Range
        • Cazadero
Van Nostrand Reinholt Press: 433 +1 other reference
Wood (1979)
        • Russian River Mining District
Wood (1979)
  • Oregon
    • Coos County
Mineralogical Society of America - ... +2 other references
 
Mineral and/or Locality  
Mindat Discussions Facebook Logo Instagram Logo Discord Logo
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2024, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: March 29, 2024 01:11:45 Page updated: March 7, 2024 12:23:02
Go to top of page