Inesite
A valid IMA mineral species - grandfathered
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About Inesite
Formula:
Ca2(Mn,Fe)7Si10O28(OH)2 · 5H2O
Colour:
Rose-red, pink, orange-pink, orange-red-brown
Lustre:
Vitreous, Silky
Hardness:
5½ - 6
Specific Gravity:
3.03 - 3.04
Crystal System:
Triclinic
Name:
Named by Adolf Schneider in 1887 from the Greek Ίνες (ines), 'flesh fibers', in allusion to its color and habit.
This page provides mineralogical data about Inesite.
Unique Identifiers
Mindat ID:
2031
Long-form identifier:
mindat:1:1:2031:8
GUID
(UUID V4):
(UUID V4):
fd732a2b-a916-4edf-8b2a-24ac112c1b26
IMA Classification of Inesite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
Ca2Mn2+7Si10O28(OH)2 · 5H2O
First published:
1887
Classification of Inesite
9.DL.05
9 : SILICATES (Germanates)
D : Inosilicates
L : Inosilicates with 5-periodic double chains, Si10O28
9 : SILICATES (Germanates)
D : Inosilicates
L : Inosilicates with 5-periodic double chains, Si10O28
66.3.3.1
66 : INOSILICATES Double-Width,Unbranched Chains,(W=2)
3 : Amphiboles - Ca-Na subgroup
66 : INOSILICATES Double-Width,Unbranched Chains,(W=2)
3 : Amphiboles - Ca-Na subgroup
14.18.21
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 |
|---|---|---|
| Ins | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Ins | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Physical Properties of Inesite
Vitreous, Silky
Transparency:
Translucent
Colour:
Rose-red, pink, orange-pink, orange-red-brown
Comment:
Weathers to ginger brown
Streak:
White
Hardness:
5½ - 6 on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
Perfect on {010}
Good on {100}
Perfect on {010}
Good on {100}
Fracture:
Irregular/Uneven
Density:
3.03 - 3.04 g/cm3 (Measured) 3.03 g/cm3 (Calculated)
Optical Data of Inesite
Type:
Biaxial (-)
RI values:
nα = 1.609 nβ = 1.636 nγ = 1.644
2V:
Measured: 60° , Calculated: 56°
Max Birefringence:
δ = 0.035
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:
r > v distinct
Optical Extinction:
X ∧ c = 74°; Y ∧ c = 32°; Z ∧ c = 62°.
Chemistry of Inesite
Mindat Formula:
Ca2(Mn,Fe)7Si10O28(OH)2 · 5H2O
Common Impurities:
Fe,Al,Mg,K
Crystallography of Inesite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 8.889(2) Å, b = 9.247(2) Å, c = 11.975(3) Å
α = 91.8°, β = 132.58°, γ = 94.37°
α = 91.8°, β = 132.58°, γ = 94.37°
Ratio:
a:b:c = 0.961 : 1 : 1.295
Unit Cell V:
718.04 ų (Calculated from Unit Cell)
Z:
1
Morphology:
Slender laths, chisel shaped, fan shaped clusters, fiberous, massive.
Known forms include c{001}, b{010}, a{100}, f{210}, m{110}, M110}, d{011}, g{201}, j{301}, h{311}, e{101}, l{101}, n{301}, o{532}, i{747}, s{946}.
Known forms include c{001}, b{010}, a{100}, f{210}, m{110}, M110}, d{011}, g{201}, j{301}, h{311}, e{101}, l{101}, n{301}, o{532}, i{747}, s{946}.
Crystal Structure
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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) |
|---|---|---|---|---|---|---|---|
| 0000669 | Inesite | Wan C, Ghose S (1978) Inesite, a hydrated calcium manganese silicate with five-tetrahedral-repeat double chains American Mineralogist 63 563-571 |  | 1978 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 9.16 Å | (100) |
| 2.92 Å | (80) |
| 2.84 Å | (80) |
| 2.73 Å | (70) |
| 2.19 Å | (60) |
| 4.59 Å | (50) |
| 4.01 Å | (50) |
Comments:
Broken Hill, Australia. Data from Ryall and Threadgold (1968).
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 22 : Hydration and low-𝑇 subsurface aqueous alteration (see also #23) |
Geological Setting:
Late stage hydrothermal mineral in manganese deposits.
Type Occurrence of Inesite
General Appearance of Type Material:
Radial aggregates of pink-red crystals up to 2 cm long by 1.5 mm.
Place of Conservation of Type Material:
Mineralogisches Museum, Philipps Universität Marburg, Germany, number MMM K35/14 (holotype).
Associated Minerals at Type Locality:
Reference:
Schneider, A. (1887) Verhandlungen der Gesellschaft. Protokoll der November - Sitzung. Über neue manganerze aus dem Dillenburgischen. Zeitschrift der Deutschen Geologischen Gesellschaft: 39: 829-834.
Synonyms of Inesite
Other Language Names for Inesite
Common Associates
Associated Minerals Based on Photo Data:
| 207 photos of Inesite associated with Hubeite | Ca2Mn2+Fe3+Si4O12(OH) · 2H2O |
| 115 photos of Inesite associated with Calcite | CaCO3 |
| 88 photos of Inesite associated with Quartz | SiO2 |
| 61 photos of Inesite associated with Apophyllite Group | AB4[Si8O22]X · 8H2O |
| 40 photos of Inesite associated with Fluorapophyllite-(K) | KCa4(Si8O20)(F,OH) · 8H2O |
| 37 photos of Inesite associated with Natrolite | Na2Al2Si3O10 · 2H2O |
| 29 photos of Inesite associated with Xonotlite | Ca6(Si6O17)(OH)2 |
| 27 photos of Inesite associated with Hydroxyapophyllite-(K) | KCa4(Si8O20)(OH,F) · 8H2O |
| 26 photos of Inesite associated with Prehnite | Ca2Al2Si3O10(OH)2 |
| 25 photos of Inesite associated with Orlymanite | Ca4Mn3Si8O20(OH)6 · 2H2O |
Related Minerals - Strunz-mindat Grouping
| 9.DL.10 | Piergorite-(Ce) | Ca8(Ce,Th,La,Nd)2(Al0.5Fe3+0.5)(◻,Li,Be)2Si6B8O36(OH,F)2 |
Other Information
Thermal Behaviour:
In a closed tube, gives off water and turns brown.
Notes:
Soluble in acids.
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 Inesite
mindat.org URL:
https://www.mindat.org/min-2031.html
Please feel free to link to this page.
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References for Inesite
Reference List:
Ito, Kenzo (1961) Thermal transformation of inesite. The Journal of the Japanese Association of Mineralogists, Petrologists and Economic Geologists, 46 (3) 65-72 doi:10.2465/ganko1941.46.65
Ryall, William R., Threadgold, Ian M. (1966) Evidence for [(SiO3)5]∞ type chains in inesite as shown by x-ray and infrared absorption studies. American Mineralogist, 51 (5-6) 754-761
Ryall, William R., Threadgold, Ian M. (1968) Inesite from the Broken Hill lode, New South Wales, Australia. American Mineralogist, 53 (9-10) 1614-1634
Wan, Che'ng, Ghose, Subrata (1975) Inesite, Ca2Mn7Si10O28(OH)2·5H2O: A new chain silicate with "Fünferdoppelketten". Die Naturwissenschaften, 62 (2) 96 doi:10.1007/bf00592183
Wan, Che'ng, Ghose, Subrata (1978) Inesite, a hydrated calcium manganese silicate with five-tetrahedral-repeat double chains. American Mineralogist, 63 (5-6) 563-571
Clifford, Janet H. (2011) Connoisseur's Choice: Inesite, Wessels Mine, Northwest of Kuruman, Kalahari Manganese District, Cape Province, South Africa. Rocks & Minerals, 86 (3) 250-260 doi:10.1080/00357529.2011.568351
Localities for Inesite
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.
Australia | |
| McQueen +2 other references |
| Ryall et al. (1968) |
| Ryall et al. (1968) | |
| Ryall et al. (1968) +1 other reference | |
| Ryall et al. (1968) +1 other reference | |
| Fred Rose (employee of drilling company during exploration and original owner of 50 specimens collected from this time) +1 other reference |
| Kim Macdonald |
China | |
| Hawthorne et al. (2002) +1 other reference |
Germany | |
| Glass et al. (1939) |
| Jahrb.Preuss.Geol.Landesanst. (1887) |
Hungary | |
| Koch: Minerals of Hungary |
Indonesia | |
| Canadian Mineralogist 38: 1125-1136 (2000) |
| Barton et al. (1978) |
Italy | |
| Balestra (2016) |
| Pipino (1984) |
| Borgo et al. (1988) +1 other reference |
| Ghizzoni et al. (2005) |
Japan | |
| J. Kitahara analysis +1 other reference |
| Kenji Togari (1986) +2 other references |
| Janet Clifford (2011) |
| Introduction to Japanese Minerals (Geological Survey of Japan, 1970) |
| Janet Clifford (2011) |
| Dr. Matsuo Nambu collection (curated at Geological Survey of Japan) |
| Yoshimura et al. (1960) |
| Janet Clifford (2011) |
| Dr. Kameki Kinoshita collection (curated at Geological Survey of Japan) |
| Dr. Matsuo Nambu collection (curated at Geological Survey of Japan) |
| - (Masutomi Museum specimen, Kyoto) +2 other references |
Mexico | |
| Farrington (1900) +1 other reference |
New Zealand | |
| R.L. Brathwaite and K. Faure +1 other reference |
Norway | |
| Neumann et al. (1980) |
Romania | |
| Hîrtopanu P. et al. (2022) |
| Hîrtopanu (1997) +1 other reference |
Slovakia | |
| Clark (1993) |
| Kodě +1 other reference |
South Africa | |
| Rock Currier photo |
| Mineralogical Record (2001) | |
| Cairncross et al. (1995) | |
| Gutzmer et al. (1993) +1 other reference | |
Spain | |
| Calvo (2018) |
| Joan Rosell specimen | |
Sweden | |
| Grensman et al. (2001) |
| |
| Natural History Museum Stockholm ... +1 other reference |
| Gatedal (n.d.) +1 other reference |
| GFF 15 +1 other reference |
| Palache et al. (1951) |
USA | |
| Murdoch (1966) |
| - (2005) |
| Murdoch (1966) |
| Murdoch (1966) | |
| Van Nostrand Reinholt Press: 414. +2 other references |
| Murdoch (1966) |
| Murdoch (1966) |
| Van Nostrand Reinholt Press: 414. +6 other references |
| |
| Van Nostrand Reinholt Press: 414. +2 other references | |
| Van Nostrand Reinholt Press: 414. +6 other references |
| Foley +4 other references |
| Cannon (1975) |
| Glass et al. (1939) |
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Fengjiashan Mine, Daye Co., Huangshi, Hubei, China