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Clino-ferri-holmquistite

A valid IMA mineral species

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Edit Clino-ferri-holmquistite Add Synonym Edit CIF structures Clear Cache

Formula:

◻Li₂(Mg₃Fe³⁺₂)(Si₈O₂₂)(OH)₂

The clino-holmquistite group minerals are monoclinic lithium amphiboles defined with:
^A(Na+K+2Ca)< 0.5 apfu,
^CLi < 0,5 apfu

Clino-ferri-holmquistite is defined with
C²⁺ position: Mg dominant
C³⁺ position: Fe dominant
W position: (OH) dominant

Colour:

Black

Lustre:

Vitreous

Hardness:

Specific Gravity:

3.19

Crystal System:

Monoclinic

Member of:

Clino-holmquistite Root Name Group > Lithium Amphibole Subgroup > w(OH,F,Cl)-dominant Amphibole Group > Amphibole Supergroup

Name:

The original material used to describe clino-ferri-holmquistite (IMA1995-045) by Caballero et al (1998) (originally named by them as "ferri-clinoholmquistite") was renamed "sodic-ferri-clinoholmquistite" and finally became Clino-ferro-ferri-holmquistite, its current valid name.

The mineral now named clino-ferri-holmquistite was originally published as ferri-ottoliniite (IMA2001-067) in 2001. In the 2012 amphibole nomenclature, its composition was considered intermediate between clino-ferri-holmquistite and magnesio-riebeckite, and the ottoliniite root name is discredited.

The clino-ferri-holmquistite holotype material empirical formula is A(K0.07Na0.38)B(Na0.70Li1.24Ca0.06)C(Mg1.35Fe2+0.92Mn2+0.13 Zn0.31Fe3+1.71Al0.10Ti0.06Li0.42) Si8 O22 (OH1.51F0.47). As Li>Na in the B position the mineral is considered a clino-ferri-holmquistite, which was approved in september 2014 (Proposal 14-G ).

This page provides mineralogical data about Clino-ferri-holmquistite.

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Unique IdentifiersHide

Mindat ID:

6928

Long-form identifier:

mindat:1:1:6928:7

Similar NamesHide

Clinoferroholmquistit	A synonym of Clino-holmquistite Root Name Group
Clinoferroholmquistite		◻Li₂[Fe₃²⁺Al₂]Si₈O₂₂(OH,F)₂

IMA Classification of Clino-ferri-holmquistiteHide

IMA status:

Approved

IMA Formula:

◻Li₂(Mg₃Fe³⁺₂)Si₈O₂₂(OH)₂

Approval year:

2014

Classification of Clino-ferri-holmquistiteHide

Strunz-mindat (2026):

9.00.

9 : SILICATES (Germanates)
0 :
0 :

Mineral SymbolsHide

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

Symbol	Source	Reference for Standard
Cfhlm	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 Clino-ferri-holmquistiteHide

Lustre:

Vitreous

Transparency:

Translucent

Colour:

Black

Streak:

Grey

Hardness:

6 on Mohs scale

Tenacity:

Brittle

Cleavage:

Perfect
{110}

Parting:

a (001) parting

Fracture:

Splintery

Density:

3.19 g/cm³ (Measured) 3.25 g/cm³ (Calculated)

Optical Data of Clino-ferri-holmquistiteHide

Type:

Biaxial (+)

RI values:

n_α = 1.699(2) n_β = 1.703(2) n_γ = 1.708(2)

2V:

Measured: 72° (7), Calculated: 83°

Max. Birefringence:

δ = 0.009
Based on recorded range of RI values above.

Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.

Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.

Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.

Thickness: 30 µm Order divisions

Rotation:

Surface Relief:

Very High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).

This shows the grain boundary and Becke line effect under plane-polarised light, based on the contrast between this mineral's average refractive index and the mounting medium. It does not take into account mineral colouration.

Focus:

In focus

Interference Figure:

This shows the idealized biaxial acute bisectrix (Bxa) interference figure - the conoscopic view for a grain cut perpendicular to the acute bisectrix, using this mineral's 2V. The two small white dots mark the melatopes - the points where the two optic axes emerge - and are shown only when they fall within the field of view. The coloured bands are isochromatics, and the dark bands are isogyres.

Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.

Thickness: 30 µm

Stage rotation: 0°

Dispersion:

relatively strong

Pleochroism:

Strong

Comments:

X = yellow green, Y = indigo blue and Z = green blue

Comments:

shows anomalous indigo and brown interference colors.

Chemistry of Clino-ferri-holmquistiteHide

Mindat Formula:

◻Li₂(Mg₃Fe³⁺₂)(Si₈O₂₂)(OH)₂

The clino-holmquistite group minerals are monoclinic lithium amphiboles defined with:
^A(Na+K+2Ca)< 0.5 apfu,
^CLi < 0,5 apfu

Clino-ferri-holmquistite is defined with
C²⁺ position: Mg dominant
C³⁺ position: Fe dominant
W position: (OH) dominant

Element Weights:

Element	% weight
O	47.454 %
Si	27.767 %
Fe	13.803 %
Mg	9.011 %
Li	1.716 %
H	0.249 %

Calculated from ideal end-member formula.

Elements listed:

Fe, H, Li, Mg, O, Si - search for minerals with similar chemistry

Crystallography of Clino-ferri-holmquistiteHide

Crystal System:

Monoclinic

Class (H-M):

2/m - Prismatic

Space Group:

B2/m

Setting:

C2/m

Cell Parameters:

a = 9.48 Å, b = 17.845 Å, c = 5.283 Å
β = 102.03°

Ratio:

a:b:c = 0.531 : 1 : 0.296

Unit Cell V:

874.10 Å³ (Calculated from Unit Cell)

Crystal StructureHide

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Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4

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CIF File Best | x | y | z | a | b | c

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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)
0020050	Clino-ferri-holmquistite	Oberti R, Camara F, Caballero J M (2004) Ferri-ottoliniite and ferriwhittakerite, two new end-members of the new Group 5 for monoclinic amphiboles American Mineralogist 89 888-893		2004	Pedriza massif, Sierra de Guadarrama, Spain	0	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Clino-ferri-holmquistite'
loop_
_publ_author_name
'Oberti R'
'Camara F'
'Caballero J M'
_journal_name_full 'American Mineralogist'
_journal_volume 89 
_journal_year 2004
_journal_page_first 888
_journal_page_last 893
_publ_section_title
;
 Ferri-ottoliniite and ferriwhittakerite, two new end-members of the new
 Group 5 for monoclinic amphiboles
 Note: this is the previously named ferri-ottoliniite
;
_database_code_amcsd 0020050
_chemical_compound_source 'Pedriza massif, Sierra de Guadarrama, Spain'
_chemical_formula_sum 'Na1.376 K.125 Mg1.35 Fe2.63 Zn.31 Al.1 Ti.06 Li1.66 Mn.13 Ca.06 Si8 H1.51 O23.51 F.47'
_cell_length_a 9.535
_cell_length_b 17.876
_cell_length_c 5.294
_cell_angle_alpha 90
_cell_angle_beta 102.54
_cell_angle_gamma 90
_cell_volume 880.824
_exptl_crystal_density_diffrn      3.297
_symmetry_space_group_name_H-M 'C 1 2/m 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,z'
  'x,-y,z'
  '1/2+x,1/2-y,z'
  '-x,y,-z'
  '1/2-x,1/2+y,-z'
  '-x,-y,-z'
  '1/2-x,1/2-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_U_iso_or_equiv
NaA   0.00000   0.50000   0.00000   0.08000   0.00203
KA   0.00000   0.50000   0.00000   0.01500   0.00203
NaAm   0.06700   0.50000   0.13600   0.29800   0.03470
KAm   0.06700   0.50000   0.13600   0.05500   0.03470
MgM1   0.00000   0.08820   0.50000   0.60500   0.01064
FeM1   0.00000   0.08820   0.50000   0.27500   0.01064
ZnM1   0.00000   0.08820   0.50000   0.12000   0.01064
FeM2   0.00000   0.18130   0.00000   0.85500   0.00861
AlM2   0.00000   0.18130   0.00000   0.05000   0.00861
TiM2   0.00000   0.18130   0.00000   0.03000   0.00861
ZnM2   0.00000   0.18130   0.00000   0.03500   0.00861
MgM2   0.00000   0.18130   0.00000   0.03000   0.00861
LiM3   0.00000   0.00000   0.00000   0.42000   0.01165
MnM3   0.00000   0.00000   0.00000   0.13000   0.01165
FeM3   0.00000   0.00000   0.00000   0.37000   0.01165
MgM3   0.00000   0.00000   0.00000   0.08000   0.01165
LiM4   0.00000   0.27430   0.50000   0.46000   0.03318
CaM4   0.00000   0.27430   0.50000   0.02000   0.03318
NaM4   0.00000   0.27430   0.50000   0.26000   0.03318
LiM4*   0.00000   0.24770   0.50000   0.16000   0.02432
CaM4*   0.00000   0.24770   0.50000   0.01000   0.02432
NaM4*   0.00000   0.24770   0.50000   0.09000   0.02432
SiT1   0.28560   0.08600   0.28060   1.00000   0.00963
SiT2   0.29570   0.17070   0.78950   1.00000   0.00912
H   0.20400   0.00000   0.77100   0.75500   0.00646
O1   0.11260   0.09070   0.20630   1.00000   0.01089
O2   0.12130   0.17260   0.73260   1.00000   0.01165
O3   0.11410   0.00000   0.70130   0.75500   0.01558
F3   0.11410   0.00000   0.70130   0.23500   0.01558
O4   0.37270   0.25020   0.78680   1.00000   0.01406
O5   0.35440   0.12940   0.06760   1.00000   0.01216
O6   0.34540   0.12040   0.56580   1.00000   0.01267
O7   0.33800   0.00000   0.28390   1.00000   0.01355
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
NaAm 0.04345 0.02752 0.04221 0.00000 0.02900 0.00000
KAm 0.04345 0.02752 0.04221 0.00000 0.02900 0.00000
MgM1 0.01668 0.00648 0.00866 0.00000 0.00341 0.00000
FeM1 0.01668 0.00648 0.00866 0.00000 0.00341 0.00000
ZnM1 0.01668 0.00648 0.00866 0.00000 0.00341 0.00000
FeM2 0.01273 0.00648 0.00758 0.00000 0.00292 0.00000
AlM2 0.01273 0.00648 0.00758 0.00000 0.00292 0.00000
TiM2 0.01273 0.00648 0.00758 0.00000 0.00292 0.00000
ZnM2 0.01273 0.00648 0.00758 0.00000 0.00292 0.00000
MgM2 0.01273 0.00648 0.00758 0.00000 0.00292 0.00000
LiM3 0.01580 0.00971 0.00988 0.00000 0.00268 0.00000
MnM3 0.01580 0.00971 0.00988 0.00000 0.00268 0.00000
FeM3 0.01580 0.00971 0.00988 0.00000 0.00268 0.00000
MgM3 0.01580 0.00971 0.00988 0.00000 0.00268 0.00000
LiM4 0.04872 0.02590 0.02828 0.00000 0.01511 0.00000
CaM4 0.04872 0.02590 0.02828 0.00000 0.01511 0.00000
NaM4 0.04872 0.02590 0.02828 0.00000 0.01511 0.00000
SiT1 0.01317 0.00648 0.00934 0.00000 0.00171 -0.00047
SiT2 0.01404 0.00486 0.00798 -0.00084 0.00146 0.00000
O1 0.01404 0.00648 0.01191 -0.00084 0.00292 0.00094
O2 0.01536 0.01133 0.00893 0.00084 0.00341 -0.00187
O3 0.01975 0.00971 0.01637 0.00000 0.00366 0.00000
F3 0.01975 0.00971 0.01637 0.00000 0.00366 0.00000
O4 0.02150 0.00648 0.01312 -0.00506 0.00122 0.00094
O5 0.01668 0.01295 0.00690 -0.00253 0.00390 0.00374
O6 0.01580 0.01457 0.00798 0.00253 0.00219 -0.00562
O7 0.01843 0.00648 0.01786 0.00000 0.00828 0.00000

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
Near-surface Processes
22 : Hydration and low-? subsurface aqueous alteration (see also #23)
Stage 4b: Highly evolved igneous rocks	>3.0
34 : Complex granite pegmatites

Synonyms of Clino-ferri-holmquistiteHide

IMA2001-067

IMA2001-067a

Other Language Names for Clino-ferri-holmquistiteHide

Dutch:Clino-ferri-holmquistiet

German:Klino-Ferri-Holmquistit

Japanese:第二鉄単斜ホルムクヴィスト閃石

Russian:Ферриклинохолмквистит

Relationship of Clino-ferri-holmquistite to other SpeciesHide

Member of:

Clino-holmquistite Root Name Group > Lithium Amphibole Subgroup > w(OH,F,Cl)-dominant Amphibole Group > Amphibole Supergroup

Other Members of Clino-holmquistite Root Name Group:

Clino-ferro-ferri-holmquistite

◻Li₂(Fe²⁺₃Fe³⁺₂)(Si₈O₂₂)(OH)₂

Mon. 2/m : B2/m

Related Minerals - Strunz-mindat Grouping Hide

9.00.	Mendigite	Mn₂Mn₂MnCa(Si₃O₉)₂	Tric. 1 : P1
9.00.	Alflarsenite	NaCa₂Be₃Si₄O₁₃(OH) · 2H₂O	Mon. 2 : P2₁
9.00.	Bridgmanite Subgroup	ABSiO₃
9.00.	Ferroericssonite	BaFe²⁺₂ Fe³⁺(Si₂O₇)O(OH)	Mon. 2/m : B2/m
9.00.	Zvyaginite	NaZnNb₂Ti[Si₂O₇]₂(OH,F)₃(H₂O)_4+x (x < 1)	Tric. 1 : P1
9.00.	Burnettite	CaVAlSiO₆	Mon. 2/m : B2/b
9.00.	Ferrisepiolite	(Fe³⁺,Fe²⁺,Mg)₄((Si,Fe³⁺)₆O₁₅)(O,OH)₂ · 6H₂O	Orth. mmm(2/m2/m2/m)
9.00.	Yegorovite	Na₄[Si₄O₈(OH)₄] · 7H₂O	Mon. 2/m : P2₁/b
9.00.	Chrysotile	Mg₃(Si₂O₅)(OH)₄	Mon. m : Bb
9.00.	'Shkatulkalita'
9.00.15 va	'Chromoamesite'	Mg₂(Al,Cr)(AlSiO₅)(OH)₄
9.00.50	Thornasite	Na₁₂Th⁴⁺₃(Si₈O₁₉)₄ · 18H₂O	Trig. 3m : R3m

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 Clino-ferri-holmquistiteHide

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https://www.mindat.org/min-6928.html
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External Links:

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Raman and XRD data at RRUFF project

References and PDF downloads at RRUFF project

American Mineralogist Crystal Structure Database

Mineral Dealers:

Buy from D. Joyce minerals

References for Clino-ferri-holmquistiteHide

Reference List:

Caballero, Jose M., Monge, Angeles, La Iglesia, Angel, Tornos, Fernando (1998) Ferri-clinoholmquistite, Li₂(Fe²⁺,Mg)₃Fe³⁺₂Si₈O₂₂(OH)₂, a new ^BLi clinoamphibole from the Pedriza Massif, Sierra de Guadarrama, Spanish Central System. American Mineralogist, 83 (1) 167-171 doi:10.2138/am-1998-1-217

Oberti, Roberta, Cámara, Fernando, Caballero, José Maria (2004) Ferri-ottoliniite and ferriwhittakerite, two new end-members of the new Group 5 for monoclinic amphiboles. American Mineralogist, 89 (5) 888-893 doi:10.2138/am-2004-5-624

Iezzi, G., Cámara, F., Oberti, R., Ventura, G. Della, Pedrazzi, G., Robert, J.-L. (2004) Synthesis, crystal structure and crystal chemistry of ferri-clinoholmquistite, □Li₂Mg₃Fe³⁺₂Si₈O₂₂(OH)₂. Physics and Chemistry of Minerals, 31 (6) doi:10.1007/s00269-004-0402-2

Hawthorne, F. C., Oberti, R. (2006) On the classification of amphiboles. The Canadian Mineralogist, 44 (1) 1-21 doi:10.2113/gscanmin.44.1.1

Hawthorne, F. C., Oberti, R., Harlow, G. E., Maresch, W. V., Martin, R. F., Schumacher, J. C., Welch, M. D. (2012) Nomenclature of the amphibole supergroup. American Mineralogist, 97 (11) 2031-2048 doi:10.2138/am.2012.4276

Localities for Clino-ferri-holmquistiteHide

Showing 1 localities.

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.

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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.

Spain

Community of Madrid

Manzanares el Real

ⓘ ~~Arroyo de la Yedra~~

Oberti et al. (2004)

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Clino-ferri-holmquistite

Unique IdentifiersHide

Similar NamesHide

IMA Classification of Clino-ferri-holmquistiteHide

Classification of Clino-ferri-holmquistiteHide

Mineral SymbolsHide

Physical Properties of Clino-ferri-holmquistiteHide

Optical Data of Clino-ferri-holmquistiteHide

Chemistry of Clino-ferri-holmquistiteHide

Crystallography of Clino-ferri-holmquistiteHide

Crystal StructureHide

Geological EnvironmentHide

Synonyms of Clino-ferri-holmquistiteHide

Other Language Names for Clino-ferri-holmquistiteHide

Relationship of Clino-ferri-holmquistite to other SpeciesHide

Related Minerals - Strunz-mindat GroupingHide

Other InformationHide

Internet Links for Clino-ferri-holmquistiteHide

References for Clino-ferri-holmquistiteHide

Localities for Clino-ferri-holmquistiteHide

Locality ListHide

Related Minerals - Strunz-mindat Grouping Hide