Deerite
A valid IMA mineral species
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About Deerite
Formula:
(Fe,Mn)6(Fe,Al)3[Si6O17]O3(OH)5
Colour:
Black
Lustre:
Sub-Adamantine
Hardness:
6
Specific Gravity:
3.837
Crystal System:
Monoclinic
Member of:
Name:
Nemed in 1965 by Stuart Olof Agrell, Michael G. Brown, and Duncan McKie in honor of Professor William Alexander Deer [October 26, 1910 Manchester, England, United Kingdom - February 8, 2009 Cambridge, England, United Kingdom], mineralogist-petrologist, Cambridge University, Cambridge, England. Prof. Deer was one of the authors of the Rock-Forming Minerals book series (Deer, Howie and Zussman).
Unique Identifiers
Mindat ID:
1245
Long-form identifier:
mindat:1:1:1245:0
GUID
(UUID V4):
(UUID V4):
a170aad4-8ca2-4847-95ab-a5c3bbe5e800
IMA Classification of Deerite
Approved
IMA Formula:
Fe2+6Fe3+3(Si6O17)O3(OH)5
Approval year:
1964
Classification of Deerite
9.DH.60
9 : SILICATES (Germanates)
D : Inosilicates
H : Inosilicates with 4-periodic single chains, Si4O12
9 : SILICATES (Germanates)
D : Inosilicates
H : Inosilicates with 4-periodic single chains, Si4O12
69.2.3.3
69 : INOSILICATES Chains with Side Branches or Loops
2 : Chains with Side Branches or Loops with P>2
69 : INOSILICATES Chains with Side Branches or Loops
2 : Chains with Side Branches or Loops with P>2
14.18.33
14 : Silicates not Containing Aluminum
18 : Silicates of Mn and Na, K, Mg, Ca or Fe
14 : Silicates not Containing Aluminum
18 : Silicates of Mn and Na, K, Mg, Ca or Fe
Mineral Symbols
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.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference |
|---|---|---|
| Dee | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Dee | Siivolam & Schmid (2007) | Siivolam, J. and Schmid, R. (2007) Recommendations by the IUGS Subcommission on the Systematics of Metamorphic Rocks: List of mineral abbreviations. Web-version 01.02.07. IUGS Commission on the Systematics in Petrology. download |
| Dee | Whitney & 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 Deerite
Sub-Adamantine
Transparency:
Translucent
Colour:
Black
Streak:
Dark gray
Hardness:
6 on Mohs scale
Tenacity:
Brittle
Cleavage:
Distinct/Good
good on {110}
good on {110}
Density:
3.837 g/cm3 (Measured) 3.86 g/cm3 (Calculated)
Optical Data of Deerite
Type:
Biaxial
RI values:
nα = 1.840(1) nγ = 1.870(1)
Birefringence:
0.030
Max Birefringence:
δ = 0.030
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
relatively strong
Pleochroism:
Weak
Comments:
X = dark brown, Y = Z = very dark brown, Z || c
Chemistry of Deerite
Mindat Formula:
(Fe,Mn)6(Fe,Al)3[Si6O17]O3(OH)5
Common Impurities:
Mg
Crystallography of Deerite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/a
Cell Parameters:
a = 10.786(8) Å, b = 18.88(2) Å, c = 9.564(9) Å
β = 107.45(5)°
β = 107.45(5)°
Ratio:
a:b:c = 0.571 : 1 : 0.507
Unit Cell V:
1,857.98 ų (Calculated from Unit Cell)
Z:
4
Twinning:
[110] twin axis; submicroscopic, pervasive.
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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Big Balls | Small Balls | Just Balls | Spacefill
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Big Balls | Small Balls | Just Balls | Spacefill
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Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0000599 | Deerite | Fleet M E (1977) The crystal structure of deerite near Panoche, San Benito County, California, USA American Mineralogist 62 990-998 |  | 1977 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 9.03 Å | (100) |
| 3.01 Å | (70) |
| 2.64 Å | (55) |
| 2.54 Å | (25) |
| 3.22 Å | (20) |
| 2.37 Å | (20) |
| 9.45 Å | (16) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-𝑇 alteration and/or metamorphism | |
| 32 : Ba/Mn/Pb/Zn deposits, including metamorphic deposits | |
| Stage 5: Initiation of plate tectonics | <3.5-2.5 |
| 39 : High-𝑃 metamorphism (blueschist, eclogite, ultrahigh 𝑃 facies) |
Geological Setting:
Iron-rich metasediments from the blueschist facies of metamorphism.
Type Occurrence of Deerite
Place of Conservation of Type Material:
National Museum of Natural History, Washington, D.C., USA, 109455; The Natural History Museum, London, England, 1964,543.
Associated Minerals at Type Locality:
Reference:
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.
Synonyms of Deerite
Other Language Names for Deerite
Relationship of Deerite to other Species
Member of:
Other Members of this group:
| Howieite | Na(Fe,Mn)10(Fe,Al)2Si12O31(OH)13 | Tric. |
| Johninnesite | Na2Mn2+9Mg7(OH)8[AsO4]2[Si6O17]2 | Tric. |
| Taneyamalite | (Na,Ca)(Mn,Mg,Fe)12Si12(O,OH)44 | Tric. |
Common Associates
Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
| 9.DH. | Gageite-2M | (Mn,Mg,Zn)42Si16O54(OH)40 |
| 9.DH. | Bavsiite | Ba2V2O2[Si4O12] |
| 9.DH. | Devilliersite | Ca4Ca2Fe3+10O4[(Fe3+10Si2)O36] |
| 9.DH. | Yuzuxiangite | Sr3Fe3+(Si2O6)2(OH) · 3H2O |
| 9.DH. | Louisfuchsite | Ca2(Mg4Ti2)(Al4Si2)O20 |
| 9.DH.05 | Leucophanite | NaCaBeSi2O6F |
| 9.DH.10 | Ohmilite | Sr3(Ti,Fe3+)(Si4O12)(O,OH) · 2-3H2O |
| 9.DH.15 | Haradaite | SrVSi2O7 |
| 9.DH.15 | Suzukiite | BaVSi2O7 |
| 9.DH.20 | Batisite | BaNaNaTi2(Si4O12)O2 |
| 9.DH.20 | Shcherbakovite | (K,Ba)KNa(Ti,Nb)2(Si4O12)O2 |
| 9.DH.20 | Noonkanbahite | BaKNaTi2(Si4O12)O2 |
| 9.DH.25 | Taikanite | Sr3BaMn2+2(Si4O12)O2 |
| 9.DH.30 | Krauskopfite | BaSi2O5 · 3H2O |
| 9.DH.35 | Balangeroite | (Mg,Fe2+,Fe3+,Mn2+)42Si16O54(OH)40 |
| 9.DH.35 | Gageite | Mn21(Si4O12)2O3(OH)20 |
| 9.DH.40 | Aenigmatite | Na4[Fe2+10Ti2]O4[Si12O36] |
| 9.DH.40 | Dorrite | Ca4(Mg3Fe3+9)O4(Si3Al8Fe3+O36) |
| 9.DH.40 | Høgtuvaite | Ca4[Fe2+6Fe3+6]O4[Si8Be2Al2O36] |
| 9.DH.40 | Krinovite | Na2Mg4Cr3+2(Si6O18)O2 |
| 9.DH.40 | Makarochkinite | (Ca,Na)4[Fe2+8Fe3+2Ti2]O4[Si8Be2Al2O36] |
| 9.DH.40 | Rhönite | Ca4[Mg8Fe3+2Ti2]O4[Si6Al6O36] |
| 9.DH.40 | Serendibite | Ca4[Mg6Al6]O4[Si6B3Al3O36] |
| 9.DH.40 | Welshite | Ca4Mg9Sb3O4[Si6Be3AlFe2O36] |
| 9.DH.40 | Wilkinsonite | Na2Fe2+4Fe3+2(Si6O18)O2 |
| 9.DH.40 | Leucorhönite | Ca2(Mg,Fe3+,Al)6(Si,Al)6O20 |
| 9.DH.40 | Kuratite | Ca2(Fe2+5Ti)O2[Si4Al2O18] |
| 9.DH.40 | Khesinite | Ca4(Mg3Fe3+9)O4(Fe3+9Si3)O36 |
| 9.DH.40 | UM1991-29-SiO:FeMgNa | Na4(Mg5Fe3+7)O4[Si9Fe3+3O36] |
| 9.DH.45 | Sapphirine | Mg4(Mg3Al9)O4[Si3Al9O36] |
| 9.DH.50 | Khmaralite | (Mg,Al,Fe)16[(Al,Si,Be)12O36]O4 |
| 9.DH.55 | Surinamite | (Mg,Fe)3Al4BeSi3O16 |
| 9.DH.55 | UM1988-26-SiO:AlMg | Mg4Al2O[Si3Al2O15] |
| 9.DH.65 | Howieite | Na(Fe,Mn)10(Fe,Al)2Si12O31(OH)13 |
| 9.DH.65 | Taneyamalite | (Na,Ca)(Mn,Mg,Fe)12Si12(O,OH)44 |
| 9.DH.70 | Johninnesite | Na2Mn2+9Mg7(OH)8[AsO4]2[Si6O17]2 |
| 9.DH.75 | Agrellite | NaCa2Si4O10F |
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.
Internet Links for Deerite
mindat.org URL:
https://www.mindat.org/min-1245.html
Please feel free to link to this page.
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References for Deerite
Reference List:
Localities for Deerite
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
China | |
| Kaihui Yang (1998) |
| Feng Xiancan et al. (1986) |
| Lifei Zhang et al. (1999) |
Cuba | |
| Stanek et al. (2006) +1 other reference |
France | |
| R. Muir Wood (1979) |
| Audren et al. (1993) +1 other reference |
| R. Muir Wood (1979) |
| R. Muir Wood (1979) |
| R. Muir Wood (1979) | |
Greece | |
| Reinecke (1987) +1 other reference |
| Eur. J. Mineral. |
Italy | |
| Martin et al. (2004) |
| Martin et al. (1984) +3 other references |
| Piccoli et al. (2007) |
| Piccoli et al. (2007) |
| Piccoli et al. (2007) | |
| Piccoli et al. (2007) | |
| Piccoli et al. (2007) | |
Papua New Guinea | |
| Worthing (1987) |
| Worthing (1987) | |
Turkey | |
| R. Muir Wood (1979) |
USA | |
| R. Muir Wood (1979) |
| Agrell (1964) +2 other references |
| Anonymous (1964) +1 other reference |
| Wood (1979) |
| Panoche Pass +2 other references |
| Wood (1979) | |
| Van Nostrand Reinholt Press: 433 +1 other reference |
| Wood (1979) | |
| The Laytonville Quarry (Mendocino County California) +1 other reference |
| R. Muir Wood (1979) |
| R. Muir Wood (1979) |
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Laytonville, Coastal Range, Mendocino County, California, USA