Hydroxylchondrodite (original) (raw)

A valid IMA mineral species

About HydroxylchondroditeHide

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An n=2 member of the humite polysomatic series.

Lustre:

Vitreous, Sub-Vitreous

Crystal System:

Monoclinic

Name:

Named for being the hydroxyl analogue of chondrodite.

Isostructural with:

Alleghanyite, Chegemite, Chondrodite, Edgrewite, Hydroxylclinohumite, Jerrygibbsite, Kumtyubeite, Leucophoenicite, Manganhumite, Norbergite, Reinhardbraunsite, Ribbeite, Sonolite

Hydroxyl analogue of chondrodite. Very rare.
The type material consists of reddish-brown translucent to cloudy grains.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:40274:5

b360d07a-66cf-4e72-b3e5-19e3d08a158a

IMA Classification of HydroxylchondroditeHide

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Type description reference:

Pekov, I. V., Gerasimova, E. I., Chukanov, N. V., Kabalov, Yu. K., Zubkova, N. V., Zadov, A. E., Yapaskurt, V. O., Gekimyants, V. M., Pushcharovskii, D. Yu. (2011) Hydroxylchondrodite Mg5(SiO4)2(OH)2: A new mineral of the humite group and its crystal structure. Doklady Earth Sciences, 436 (2) 230-236 doi:10.1134/s1028334x11020073

Classification of HydroxylchondroditeHide

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9.AF.45

9 : SILICATES (Germanates)
A : Nesosilicates
F : Nesosilicates with additional anions; cations in [4], [5] and/or only [6] coordination

52.3.3.6

52 : NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
3 : Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] coordination only

Mineral SymbolsHide

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

Physical Properties of HydroxylchondroditeHide

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Streak:

Pale-reddish brown to white

Fracture:

Irregular/Uneven

Density:

3.21 g/cm3 (Measured) 3.183 g/cm3 (Calculated)

Optical Data of HydroxylchondroditeHide

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RI values:

_n_α = 1.662(3) _n_β = 1.669(2) _n_γ = 1.688(2)

2V:

Measured: 80° , Calculated: 63°

δ = 0.026

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Comments:

X = brown; Y = light brown with grayish green tint; Z = pale grayish greenish brown.

Comments:

Absorption: X > Y > Z.

Chemistry of HydroxylchondroditeHide

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Mindat Formula:

Mg5(SiO4)2(OH)2

An n=2 member of the humite polysomatic series.

Crystallography of HydroxylchondroditeHide

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Crystal System:

Monoclinic

Class (H-M):

2/m - Prismatic

Cell Parameters:

a = 7.8847(12) Å, b = 4.7235(8) Å, c = 10.2869(5) Å
β = 109.19(1)°

Ratio:

a:b:c = 1.669 : 1 : 2.178

Unit Cell V:

361.83 ų (Calculated from Unit Cell)

Morphology:

As coarse tabular or lens-like crystals and in aggregates.

Twinning:

Thin polysynthetic on {001}.

Crystal StructureHide

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X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Geological EnvironmentHide

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Geological Setting:

In the contact zone between magnesium skarn and marble.

Type Occurrence of HydroxylchondroditeHide

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General Appearance of Type Material:

Coarsely formed tabular or lens-like crystals with sizes up to 0.5 × 1.5 × 1.5 cm and their intergrowths up to 2 cm.

Place of Conservation of Type Material:

Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow, Russia, no.3986/1

Geological Setting of Type Material:

Contact zone between magnesium skarn and host marble.

Associated Minerals at Type Locality:

Reference:

Pekov, I.V., Gerasimova, E.I., Chukanov, N.V., Kabalov, Y.K., Zubkova, N.V., Zadov, A.E., Yapaskurt, V.O., Gekimyants, V.M., Pushcharovskii, D.Y. (2011) Hydroxylchondrodite Mg5(SiO4)2(OH)2: a new mineral of the humite group and its crystal structure [in English]. Doklady Earth Sciences, 436, 230-236.

Synonyms of HydroxylchondroditeHide

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Other Language Names for HydroxylchondroditeHide

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Relationship of Hydroxylchondrodite to other SpeciesHide

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Other Members of this group:

Common AssociatesHide

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Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

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Fluorescence of HydroxylchondroditeHide

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Other InformationHide

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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 HydroxylchondroditeHide

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References for HydroxylchondroditeHide

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Reference List:

Pekov, I. V., Gerasimova, E. I., Chukanov, N. V., Kabalov, Yu. K., Zubkova, N. V., Zadov, A. E., Yapaskurt, V. O., Gekimyants, V. M., Pushcharovskii, D. Yu. (2011) Hydroxylchondrodite Mg5(SiO4)2(OH)2: A new mineral of the humite group and its crystal structure. Doklady Earth Sciences, 436 (2) 230-236 doi:10.1134/s1028334x11020073

Localities for HydroxylchondroditeHide

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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

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- 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.