Hydroxylclinohumite (original) (raw)
A valid IMA mineral species
About HydroxylclinohumiteHide
This section is currently hidden. Click the show button to view.
a n=4 member of the humite polysomatic series
Colour:
Pale yellow to orange-yellow, almost colourless.
Crystal System:
Monoclinic
Name:
In allusion to its chemical composition and crystal structure as the HYDROXYL-dominant, monoCLINic member of the group and its relationship to humite which was named after Sir Abraham Hume (1749-1838), English connoisseur and collector of gems, minerals and artwork.
Isostructural with:
Alleghanyite, Chegemite, Chondrodite, Edgrewite, Hydroxylchondrodite, Jerrygibbsite, Kumtyubeite, Leucophoenicite, Manganhumite, Norbergite, Reinhardbraunsite, Ribbeite, Sonolite
Hydroxylclinohumite is a monoclinic member of the humite group. It forms a continuous series towards clinohumite. The name "clinohumite" has commonly been used as a default when the F/OH ratio has not been determined. Since hydroxylclinohumite was approved as a separate mineral (1998), it has become apparent that hydroxylclinohumite is much more common than indicated in the literature and locality entries in Mindat. It should also be noted that some of the published analyses (Luc Yen, Vietnam and Kukh-i-Lal,Tajikistan) are very close to the borderline between the two minerals, and both of these minerals are probably present at many localities.
Hydroxylclinohumite often contain some Ti and the varietal name titanoclinohumite (older literature uses the name "titanolivine" for this variety) is commonly used. Zambonini (1919) came to the conclusion that "titanolivine" from Ala Valley (Piedmont, Italy) is a titanian clinohumite very rich in OH and pratically F-free; therefore, he proposed, unsuccessfully, to substitute the name "titanolivine" with "titanhydroclinohumite" or "hydroclinohumite titanifère" (the species hydroxylclinohumite has been instituted in 1998 only). Humite group minerals found in metamorphosed serpentinites are often hydroxylclinohumite.
It is difficult to distinguish minerals in the humite group, as they largely occur in the same environments and localities. Their physical and optical appearances are also similar, as is the occurrence as rounded crystals or anhedral grains. A quantitative chemical analysis (electron microprobe) combined with structural analyses (XRD) seem to be required to identify individual humite-group species with absolute certainty. It is therefore quite possible that some of the locality entries and photos may be incorrectly identified as hydroxylclinohumite.
Unique IdentifiersHide
This section is currently hidden. Click the show button to view.
Long-form identifier:
mindat:1:1:7729:9
48173bbd-652c-4867-a6ea-feed0ac923f3
IMA Classification of HydroxylclinohumiteHide
This section is currently hidden. Click the show button to view.
Type description reference:
Classification of HydroxylclinohumiteHide
This section is currently hidden. Click the show button to view.
9.AF.55
9 : SILICATES (Germanates)
A : Nesosilicates
F : Nesosilicates with additional anions; cations in [4], [5] and/or only [6] coordination
Mineral SymbolsHide
This section is currently hidden. Click the show button to view.
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Hchu | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of HydroxylclinohumiteHide
This section is currently hidden. Click the show button to view.
Transparency:
Transparent, Translucent
Colour:
Pale yellow to orange-yellow, almost colourless.
Hardness:
VHN60=732 - 747 kg/mm2 - Vickers
Cleavage:
None Observed
None
Fracture:
Irregular/Uneven, Conchoidal
Density:
3.13 g/cm3 (Measured) 3.14 g/cm3 (Calculated)
Optical Data of HydroxylclinohumiteHide
This section is currently hidden. Click the show button to view.
RI values:
_n_α = 1.631 _n_β = 1.641 _n_γ = 1.664
2V:
Measured: 70° , Calculated: 68°
δ = 0.033
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Comments:
X = yellow, Z = colorless.
Chemistry of HydroxylclinohumiteHide
This section is currently hidden. Click the show button to view.
Mindat Formula:
Mg9(SiO4)4(OH)2
a n=4 member of the humite polysomatic series
Chemical AnalysisHide
This section is currently hidden. Click the show button to view.
Empirical formulas:
| Sample ID | Empirical Formula |
|---|---|
| 1 | Mg8.58Fe0.24 Mn0.03 B0.14 Zn0.02Ti0.04(Si0.99O4)4O0.16F0.04(OH)1.80. |
| 2 | (Mg0.69Ti0.29Fe0.02)?1.00Mg7.91(SiO4)4.08[(OH)1.10F0.53O0.37]?2.00; ideal formula: (Mg0.7Ti0.3)?1Mg8.0(SiO4)4[(OH)1.2F0.5O0.3]2) |
Sample references:
Crystallography of HydroxylclinohumiteHide
This section is currently hidden. Click the show button to view.
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 13.6894(3) Å, b = 4.748(1) Å, c = 10.273(2) Å
β = 100.63°
Ratio:
a:b:c = 2.883 : 1 : 2.164
Twinning:
[Not reported, but clinohumite showns twinning on {100}.]
Crystal StructureHide
This section is currently hidden. Click the show button to view.
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
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0000301 | Hydroxylclinohumite | Robinson K, Gibbs G V, Ribbe P H (1973) The crystal structures of the humite minerals. IV. Clinohumite and titanclinohumite American Mineralogist 58 43-49 |  |
1973 | 0 | 293 | |
| 0000302 | Hydroxylclinohumite | Robinson K, Gibbs G V, Ribbe P H (1973) The crystal structures of the humite minerals. IV. Clinohumite and titanoclinohumite American Mineralogist 58 43-49 | |
1973 | 0 | 293 | |
| 0000668 | Hydroxylclinohumite | Fujino K, Takeuchi Y (1978) Crystal chemistry of titanian chondrodite and titanian clinohumite of high-pressure origin American Mineralogist 63 535-543 | |
1978 | 0 | 293 | |
| 0002626 | Hydroxylclinohumite | Berry A J, James M (2001) Refinement of hydrogen positions in synthetic hydroxyl-clinohumite by powder neutron diffraction American Mineralogist 86 181-184 | |
2001 | 0 | 293 | |
| 0002660 | Hydroxylclinohumite | Friedrich A, Lager G A, Kunz M, Chakoumakos B C, Smyth J R, Schultz A J (2001) Temperature-dependent single-crystal neutron diffraction study of natural chondrodite and clinohumite American Mineralogist 86 981-989 | |
2001 | 0 | 295 | |
| 0002661 | Hydroxylclinohumite | Friedrich A, Lager G A, Kunz M, Chakoumakos B C, Smyth J R, Schultz A J (2001) Temperature-dependent single-crystal neutron diffraction study of natural chondrodite and clinohumite American Mineralogist 86 981-989 | |
2001 | 0 | 100 | |
| 0002662 | Hydroxylclinohumite | Friedrich A, Lager G A, Kunz M, Chakoumakos B C, Smyth J R, Schultz A J (2001) Temperature-dependent single-crystal neutron diffraction study of natural chondrodite and clinohumite American Mineralogist 86 981-989 | |
2001 | 0 | 20 | |
| 0005091 | Hydroxylclinohumite | Kocman V, Rucklidge J C (1973) The crystal structure of a titaniferous clinohumite The Canadian Mineralogist 12 39-45 | |
1973 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder DiffractionHide
This section is currently hidden. Click the show button to view.
Image Loading
Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 13.9 Å | (10) |
| 6.73 Å | (6) |
| 5.05 Å | (70) |
| 4.49 Å | (5) |
| 4.46 Å | (52) |
| 4.29 Å | (11) |
| 4.18 Å | (11) |
| 3.88 Å | (31) |
| 3.78 Å | (8) |
| 3.72 Å | (95) |
| 3.67 Å | (8) |
| 3.50 Å | (28) |
| 3.46 Å | (33) |
| 3.35 Å | (64) |
| 3.23 Å | (30) |
| 3.03 Å | (18) |
| 2.922 Å | (11) |
| 2.772 Å | (91) |
| 2.754 Å | (60) |
| 2.748 Å | (50) |
| 2.690 Å | (17) |
| 2.612 Å | (39) |
| 2.551 Å | (80) |
| 2.516 Å | (93) |
| 2.414 Å | (38) |
| 2.398 Å | (25) |
| 2.365 Å | (50) |
| 2.311 Å | (15) |
| 2.295 Å | (8) |
| 2.269 Å | (100) |
| 2.259 Å | (95) |
| 2.224 Å | (5) |
| 2.215 Å | (8) |
| 2.200 Å | (15) |
| 2.155 Å | (12) |
| 2.092 Å | (9) |
| 1.884 Å | (9) |
| 1.878 Å | (6) |
| 1.779 Å | (10) |
| 1.747 Å | (79) |
| 1.687 Å | (20) |
| 1.632 Å | (22) |
| 1.620 Å | (20) |
| 1.548 Å | (8) |
| 1.512 Å | (7) |
| 1.495 Å | (37) |
| 1.485 Å | (51) |
| 1.402 Å | (20) |
| 1.398 Å | (12) |
| 1.351 Å | (15) |
| 1.348 Å | (18) |
Comments:
УДК549.621+522.161(470.5)ЗВМО.М5.1999г.Proc.RМS.N5.1999@В.М.ГЕКИМЯНЦ.*Е.В.СОКОЛОВА,*Э.М.СПИРИДОНОВ.*ДЖ.ФЕРРАРИС.**Н.В.ЧУКАНОВ.***М.ПРЕНЧИПЕ.**В.Н.АВДОНИН,****Ю.А.ПОЛЕНОВ****ГИДРОКСИЛКЛИНОГУМИТM~(Si04MOH,F)z-НОВЫЙМИНЕРАЛИЗГРУППЫГУМИТА\v.М.GEK1MYANTS.Е.У.SOKOLOVA.Е.М.SPlR1DONOV,О.FERRARlS.N.У.CHUКANOV,М.PRENC1PE.У.N.А VDON1N.Уи.А.POLENOV.HYDROXYLCLINOHUMlТE Mg9(Si04)4(OH,F)2 - А NEW MINERAL ОF ТНЕ HUMIТE GROUP
Geological EnvironmentHide
This section is currently hidden. Click the show button to view.
Type Occurrence of HydroxylclinohumiteHide
This section is currently hidden. Click the show button to view.
General Appearance of Type Material:
Oval, elongate grains to 3 mm in diameter, and as aggregates to 2 cm associated with spinel as inclusions in calcite. Without crystal faces.
Place of Conservation of Type Material:
- Mining Geological Museum at Ekaterinburg, Russia.
- Mineralogy Museum of Saint Petersburg University, Russia.
Geological Setting of Type Material:
In Mg-skarn (calciphyric) rims around dolomitic marble xenoliths in gabbroic rocks.
Associated Minerals at Type Locality:
Reference:
Gekimyants, V.M., Sokolova, E.V., Spiridonov, E.M., Ferraris, G., Chukanov, N.V., Prencipe, M., Avdonin, V.N., Polenov, Yu.A. (1999): Hydroxylclinohumite Mg9(SiO4)4(OH,F)2 - a new mineral of the humite group. Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 128(5): 64-70.
Synonyms of HydroxylclinohumiteHide
This section is currently hidden. Click the show button to view.
Other Language Names for HydroxylclinohumiteHide
This section is currently hidden. Click the show button to view.
Varieties of HydroxylclinohumiteHide
This section is currently hidden. Click the show button to view.
| Titanclinohumite | A Ti-bearing variety of both Clinohumite and Hydroxylclinohumite.The varietal name titanoclinohumite (older literature uses the name "titanolivine" for this variety) is commonly used to indicate Ti-bearing hydroxylclinohumite found in metamorphosed serp... |
|---|
Relationship of Hydroxylclinohumite to other SpeciesHide
This section is currently hidden. Click the show button to view.
Other Members of this group:
Common AssociatesHide
This section is currently hidden. Click the show button to view.
Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat GroupingHide
This section is currently hidden. Click the show button to view.
| 9.AF. | Chegemite | Ca7(SiO4)3(OH)2 | Orth. m m m _(_2/_m_2/_m_2/m ) |
|---|---|---|---|
| 9.AF. | Jingwenite-(Y) | YAlV4+(SiO4)O2(OH)2 | Mon. 2/m |
| 9.AF. | Barwoodite | Mn2+6Nb5+(SiO4)2O3(OH)3 | Trig. 3 : _P_3 |
| 9.AF.05 | Sillimanite | Al2(SiO4)O | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 9.AF.05 | Xenolite | Al10Si8O31 | |
| 9.AF.10 | Kanonaite | Mn3+Al(SiO4)O | Orth. m m m _(_2/_m_2/_m_2/m ) : P n n m |
| 9.AF.10 | Andalusite | Al2(SiO4)O | Orth. m m m _(_2/_m_2/_m_2/m ) : P n n m |
| 9.AF.15 | Kyanite | Al2(SiO4)O | Tric. 1 : _P_1 |
| 9.AF.20 | Krieselite | Al2(GeO4)F2 | Orth. m m m _(_2/_m_2/_m_2/m ) : P n m a |
| 9.AF.20 | Mullite | Al4+2xSi2-2xO10-x | Orth. m m m _(_2/_m_2/_m_2/m ) : P b a m |
| 9.AF.23 | Boromullite | Al9BSi2O19 | Orth. m _m_2 : C m _c_21 |
| 9.AF.25 | Yoderite | Mg(Al,Fe3+)3(SiO4)2O(OH) | Mon. 2/m : _P_21/m |
| 9.AF.30 | Zincostaurolite | Zn2Al9Si4O23(OH) | Mon. 2/m : _B_2/m |
| 9.AF.30 | Staurolite | Fe2+2Al9Si4O23(OH) | Mon. 2/m : _B_2/m |
| 9.AF.30 | Magnesiostaurolite | Mg(Mg,Li)3(Al,Mg)18Si8O44(OH)4 | Mon. 2/m : _B_2/m |
| 9.AF.35 | Topaz | Al2(SiO4)(F,OH)2 | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 9.AF.40 | Norbergite | Mg3(SiO4)F2 | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 9.AF.45 | Chondrodite | Mg5(SiO4)2F2 | Mon. 2/m : _P_21/b |
| 9.AF.45 | Kumtyubeite | Ca5(SiO4)2F2 | Mon. 2/m : _P_21/b |
| 9.AF.45 | Reinhardbraunsite | Ca5(SiO4)2(OH,F)2 | Mon. 2/m : _P_21/b |
| 9.AF.45 | Hydroxylchondrodite | Mg5(SiO4)2(OH)2 | Mon. 2/m : _P_21/b |
| 9.AF.45 | Alleghanyite | Mn2+5(SiO4)2(OH)2 | Mon. 2/m : _P_21/b |
| 9.AF.50 | Unnamed (Ca-analogue of Humite) | Ca7(SiO4)4F2 | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 9.AF.50 | Humite | Mg7(SiO4)3F2 | Orth. m m m _(_2/_m_2/_m_2/m ) : P n m a |
| 9.AF.50 | Manganhumite | (Mn2+,Mg)7(SiO4)3(OH)2 | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 9.AF.50 | Unnamed (OH-analogue of humite) | Mg7(SiO4)3(OH)2 | Orth. |
| 9.AF.50 | Fluorchegemite | Ca7(SiO4)3F2 | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 9.AF.55 | Clinohumite | Mg9(SiO4)4F2 | Mon. 2/m : _P_21/b |
| 9.AF.55 | Sonolite | Mn2+9(SiO4)4(OH)2 | Mon. 2/m : _P_21/b |
| 9.AF.60 | Leucophoenicite | Mn2+7(SiO4)3(OH)2 | Mon. 2/m : _P_21/b |
| 9.AF.65 | Ribbeite | Mn2+5(SiO4)2(OH)2 | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 9.AF.70 | Jerrygibbsite | Mn2+9(SiO4)4(OH)2 | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c n |
| 9.AF.75 | Franciscanite | Mn2+6(V5+,◻)2(SiO4)2(O,OH)6 | Trig. 3 : _P_3 |
| 9.AF.75 | Scorticoite | Mn6(Sb,◻)Σ2(SiO4)2O3(OH)3 | Trig. 3 : _P_3 |
| 9.AF.75 | Welinite | Mn2+6(W6+,Mg)2(SiO4)2(O,OH)6 | Trig. 3 : _P_3 |
| 9.AF.75 | Örebroite | Mn2+3(Sb5+,Fe3+)(SiO4)(O,OH)3 | Trig. 3 : _P_3 |
| 9.AF.80 | Ellenbergerite | Mg6(Mg,Ti,Zr,◻)2(Al,Mg)6Si8O28(OH)10 | Hex. 6 : _P_63 |
| 9.AF.85 | Magnesiochloritoid | MgAl2O(SiO4)(OH)2 | Mon. 2/m : _B_2/b |
| 9.AF.85 | Ottrélite | Mn2+Al2O(SiO4)(OH)2 | Mon. |
| 9.AF.85 | Chloritoid | Fe2+Al2O(SiO4)(OH)2 | Mon. 2/m : _B_2/b |
| 9.AF.90 | Olmiite | CaMn2+[SiO3(OH)](OH) | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c a |
| 9.AF.90 | Poldervaartite | CaCa[SiO3(OH)](OH) | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c a |
| 9.AF.95 | Pilawite-(Y) | Ca2Y2Al4(SiO4)4O2(OH)2 | Mon. 2/m : _P_21/b |
Other InformationHide
This section is currently hidden. Click the show button to view.
IR Spectrum:
Strong absorption bands at 987, 960, 724, 610, and 530 cm–1, plus 3560, 3580, and 3385 cm–1.
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 HydroxylclinohumiteHide
This section is currently hidden. Click the show button to view.
References for HydroxylclinohumiteHide
This section is currently hidden. Click the show button to view.
Reference List:
Ferraris, Giovanni, Prencipe, M., Sokolova, E., Gekimyants, V.M., Spiridonov, E.M. (2000) Hydroxylclinohumite, a new member of the humite group: Twinning, crystal structure and crystal chemistry of the clinohumite subgroup. Zeitschrift für Kristallographie - Crystalline Materials, 215 (3). 169-173 doi:10.1524/zkri.2000.215.3.169
Friedrich, Alexandra, Lager, George A., Kunz, Martin, Chakoumakos, Bryan C., Smyth, Joseph R., Schultz, Arthur J. (2001) Temperature-dependent single-crystal neutron diffraction study of natural chondrodite and clinohumites. American Mineralogist, 86 (9) 981-989 doi:10.2138/am-2001-8-904
Krivovichev, Vladimir G., Kuksa, Katherine A., Sokolov, Pavel B., Panikorovskii, Taras L., Bocharov, Vladimir N., Gussiås, Geir Atle (2023) First Occurrence of Titanian Hydroxylclinohumite in Marble-Hosting Gem Spinel Deposits, Luc Yen, Vietnam. Minerals, 13 (7) 901 doi:10.3390/min13070901
Localities for HydroxylclinohumiteHide
This section is currently hidden. Click the show button to view.
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 section is currently hidden. Click the show button to view.
- 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.