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Tremolite

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Formula:
☐{Ca2}{Mg5}(Si8O22)(OH)2
The tremolite-actinolite series are defined as calcium amphiboles with A(Na+K+ 2Ca)<0,5 apfu and with C(Al+Fe3++2Ti)<0,5 apfu. The W position may contain (OH), F or Cl.

Tremolite is defined with
C2+ position: Mg>4.5 apfu
W position: (OH) dominant.

Tremolite is one of the few amphiboles that has not been redefined or renamed in any of the amphibole nomenclature reports.
Colour:
White, brown, colourless, grey, light green, green, light yellow, pink-violet
Lustre:
Vitreous, Silky
Hardness:
5 - 6
Specific Gravity:
2.99 - 3.03
Crystal System:
Monoclinic
Name:
Named in 1789 by Johann Georg Albrecht Höpfner for the Tremola Valley (Val Tremola), Central St Gotthard Massif, Tessin, Switzerland, where the type material supposedly came from, according to the dealer from whom he had acquired the specimens. However, modern investigations of what is considered the type material, conserved at Geneva, revealed that the true type locality is Campolungo, Tessin. (Val Tremola which lies north of the isograd delineating the first appearance of tremolite). This mineral was earlier (1782) called Säulenspath and Sternspath by Johann Ehrenreich von Fichtel for material from Sebeşu de Jos, Transylvania, Romania (Roth, 2006).
Tremolite forms a continuous series with the other minerals in the tremolite-actinolite series. It also forms a continuous series with edenite and richterite. At elevated PT conditions (upper amphibolite - granulite facies), the tremolite-actinolite series minerals also form a continuous series with the hornblende root name group minerals. Intermadiate compositions between cummingtonite and tremolite are also known. Tremolite is one of the few amphiboles that can be identified by EDS with reasonable certainty.

Fibrous habit.
Byssolite habit
Star and fan formed aggregates
single crystal
Pseudomorph after diopside
Fibrous habit.
Byssolite habit
Star and fan formed aggregates
single crystal
Pseudomorph after diopside
Fibrous habit.
Byssolite habit
Star and fan formed aggregates
single crystal
Pseudomorph after diopside

Tremolite is an important rock-forming mineral and occurs most commonly as a white to light green, granular to fibrous component of metamorphosed carbonate rocks, especially skarns and dolomite marbles, where the crystals and aggregates can become quite large. Any light colored amphibole in a marble will normally be tremolite. Large isolated and well-terminated crystals are rare. In this environment, it commonly forms as pseudomorphs of tremolite after diopside, but can also be primary. Tremolite is also common in many metamorphosed mafic and ultramafic rocks such as amphibolites and metabasalts although actinolite and other iron-rich amphiboles usually dominate there. Fibrous (asbestiform) tremolite veins are common in many metamorphic rock types, especially where they are carbonate-bearing. In meta-igneous rocks, cummingtonite and anthophyllite can be difficult to distinguish from tremolite, but these are more restricted to metamorphosed Ca-poor ultramafic rocks like serpentinites.

dark brown tremolite
green tremolite, colored by Fe
var. hexagonite, colored by Mn
var chrome-tremolite colored by Cr and/or V
dark brown tremolite
green tremolite, colored by Fe
var. hexagonite, colored by Mn
var chrome-tremolite colored by Cr and/or V
dark brown tremolite
green tremolite, colored by Fe
var. hexagonite, colored by Mn
var chrome-tremolite colored by Cr and/or V

Although the most common color of tremolite is white or other pale colors, it may also be brown, greenish (coloured by Fe), grass green (colored by Cr and/or V) or purple (coloured by Mn).

Tremolite colored by Chrome is often called chrome-tremolite, whereas the purple variety is called hexagonite.

The amphibole varieties byssolite (hair-like fibres), and nephrite can consist, fully or partly, of tremolite.

Tremolite may be highly fibrous to asbestiform, and can then be included in the group of materials called asbestos, though it was rarely used commercially. As with all asbestiform minerals, this fibrous variety is considered carcinogenic if ground into fine dust and inhaled in large amounts, so people should use care in its handling.

For further information, see the tremolite best minerals article, see link: http://www.mindat.org/mesg-86-198178.html

Visit gemdat.org for gemological information about Tremolite.


Hide all sections | Show all sections

Classification of TremoliteHide

Approved, 'Grandfathered' (first described prior to 1959)
9.DE.10

9 : SILICATES (Germanates)
D : Inosilicates
E : Inosilicates with 2-periodic double chains, Si4O11; Clinoamphiboles
66.1.3a.1

66 : INOSILICATES Double-Width,Unbranched Chains,(W=2)
1 : Amphiboles - Mg-Fe-Mn-Li subgroup
14.6.13

14 : Silicates not Containing Aluminum
6 : Silicates of Ca with alkali or Mg or both

Physical Properties of TremoliteHide

Vitreous, Silky
Transparency:
Transparent, Translucent
Colour:
White, brown, colourless, grey, light green, green, light yellow, pink-violet
Streak:
White
Hardness:
5 - 6 on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
on {110}
Parting:
on {010} {100}
Fracture:
Splintery
Density:
2.99 - 3.03 g/cm3 (Measured)    2.964 g/cm3 (Calculated)

Optical Data of TremoliteHide

Type:
Biaxial (-)
RI values:
nα = 1.599 - 1.612 nβ = 1.613 - 1.626 nγ = 1.625 - 1.637
2V:
Measured: 88° to 80°, Calculated: 82° to 84°
Max Birefringence:
δ = 0.026
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r < v weak

Chemical Properties of TremoliteHide

Formula:
☐{Ca2}{Mg5}(Si8O22)(OH)2

The tremolite-actinolite series are defined as calcium amphiboles with A(Na+K+ 2Ca)<0,5 apfu and with C(Al+Fe3++2Ti)<0,5 apfu. The W position may contain (OH), F or Cl.

Tremolite is defined with
C2+ position: Mg>4.5 apfu
W position: (OH) dominant.

Tremolite is one of the few amphiboles that has not been redefined or renamed in any of the amphibole nomenclature reports.
IMA Formula:
◻Ca2Mg5Si8O22(OH)2
Common Impurities:
Ti,Mn,Al,Na,K,F,Cl,H2O

Crystallography of TremoliteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Cell Parameters:
a = 9.84 Å, b = 18.02 Å, c = 5.27 Å
β = 104.95°
Ratio:
a:b:c = 0.546 : 1 : 0.292
Unit Cell V:
902.83 ų (Calculated from Unit Cell)
Morphology:
Elongated, stout prismatic, bladed, fibrous, granular, columnar crystals and aggregates.

Twinning:
Simple or multiple: common parallel to {100}, rarely parallel to {001}

X-Ray Powder DiffractionHide

Image Loading

Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.
Powder Diffraction Data:
d-spacingIntensity
3.12 (100)
8.38 (100)
2.71 (90)

Type Occurrence of TremoliteHide

Synonyms of TremoliteHide

Other Language Names for TremoliteHide

Varieties of TremoliteHide

Chrome-TremoliteA Cr-bearing tremolite.
Chromian tremolite
HexagoniteSupposedly a hexagonal form of tremolite, but shown to be monoclinic. A manganoan variety distinguished by its pale lilac to purplish color.

Relationship of Tremolite to other SpeciesHide

Other Members of this group:
Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2Mon. 2/m : B2/m
Ferro-actinolite☐{Ca2}{Fe2+5}(Si8O22)(OH)2Mon.
Ferro-fluoro-actinolite☐{Ca2}{Fe5}(Si8O22)F2
Fluoro-tremolite☐{Ca2}{Mg5}(Si8O22)F2Mon. 2/m : B2/m
Forms a series with:

Common AssociatesHide

CalciteCaCO3
DiopsideCaMgSi2O6
DolomiteCaMg(CO3)2
Associated Minerals Based on Photo Data:
Quartz41 photos of Tremolite associated with Quartz on mindat.org.
Calcite39 photos of Tremolite associated with Calcite on mindat.org.
Pyrite30 photos of Tremolite associated with Pyrite on mindat.org.
Fluor-uvite29 photos of Tremolite associated with Fluor-uvite on mindat.org.
Diopside23 photos of Tremolite associated with Diopside on mindat.org.
Manganocummingtonite14 photos of Tremolite associated with Manganocummingtonite on mindat.org.
Talc13 photos of Tremolite associated with Talc on mindat.org.
Scapolite12 photos of Tremolite associated with Scapolite on mindat.org.
Epidote11 photos of Tremolite associated with Epidote on mindat.org.
Magnetite11 photos of Tremolite associated with Magnetite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.DE.05Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2Orth. mmm (2/m 2/m 2/m) : Pnma
9.DE.05Cummingtonite☐{Mg2}{Mg5}(Si8O22)(OH)2Mon.
9.DE.05Clino-holmquistite Root Name☐{Li2}{Z2+3Z3+2}(Si8O22)(OH,F,Cl)2Mon.
9.DE.05Grunerite☐{Fe2+2}{Fe2+5}(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.05Manganocummingtonite☐{Mn2+2}{Mg5}(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.05Manganogrunerite☐{Mn2+2}{Fe2+5}(Si8O22)(OH)2Mon.
9.DE.05Permanganogrunerite☐{Mn2+2}{Mn2+5}(Si8O22)(OH)2Mon.
9.DE.05Ferro-fluoro-pedrizite{Na}{Li2}{Fe2Al2Li}(Al2Si6O22)F2Mon. 2/m : B2/m
9.DE.05Ferri-fluoro-leakeite{Na}{Na2}{Mg2Fe3+2Li}(Si8O22)F2Mon. 2/m : B2/m
9.DE.10Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.10Ferri-tschermakite☐{Ca2}{Mg3Fe3+2}(Al2Si6O22)(OH)2Mon.
9.DE.10Ferro-actinolite☐{Ca2}{Fe2+5}(Si8O22)(OH)2Mon.
9.DE.10Ferro-hornblende☐{Ca2}{Fe2+4Al}(AlSi7O22)(OH)2Mon.
9.DE.10Ferro-tschermakite☐{Ca2}{Fe2+3Al2}(Al2Si6O22)(OH)2Mon. 2/m : B2/m
9.DE.10Joesmithite{Pb}{Ca2}{Mg3Fe3+2}(Be2Si6O22)(OH)2Mon.
9.DE.10Magnesio-hornblende☐{Ca2}{Mg4Al}(AlSi7O22)(OH)2Mon.
9.DE.10Tschermakite☐(Ca2)(Mg3Al2)(Al2Si6O22)(OH)2Mon. 2/m : B2/m
9.DE.10CannilloiteCa(Ca2)(Mg4Al)(Al3Si5O22)(OH)2Mon.
9.DE.10Fluoro-cannilloite{Ca}{Ca2}{Mg4Al}(Al3Si5O22)(F,OH)2Mon.
9.DE.10Parvo-manganotremolite☐{CaMn2+}{Mg5}(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.10Fluoro-tremolite☐{Ca2}{Mg5}(Si8O22)F2Mon. 2/m : B2/m
9.DE.10Potassic-fluoro-pargasite{K}{Ca2}{Mg4Al}(Al2Si6O22)F2Mon. 2/m : B2/m
9.DE.15Edenite{Na}{Ca2}{Mg5}(AlSi7O22)(OH)2Mon.
9.DE.15Ferro-edenite{Na}{Ca2}{Fe2+5}(AlSi7O22)(OH)2Mon.
9.DE.15Ferro-kaersutite{Na}{Ca2}{Fe2+3AlTi}(Al2Si6O22)O2Mon.
9.DE.15Ferro-pargasite{Na}{Ca2}{Fe2+4Al}(Al2Si6O22)(OH)2Mon.
9.DE.15Hastingsite{Na}{Ca2}{Fe2+4Fe3+}(Al2Si6O22)(OH)2Mon.
9.DE.15Kaersutite{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2 Mon.
9.DE.15Magnesio-hastingsite{Na}{Ca2}{Mg4Fe3+}(Al2Si6O22)(OH)2Mon.
9.DE.15Pargasite{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2Mon.
9.DE.15Sadanagaite{Na}{Ca2}{Mg3Al2}(Si5Al3O22)(OH)2Mon.
9.DE.15Fluoro-edenite{Na}{Ca2}{Mg5}(AlSi7O22)(F,OH)2Mon. 2/m : P2/m
9.DE.15Potassic-ferro-ferri-sadanagaite{K}{Ca2}{Fe2+3Fe3+2}(Al3Si5O22)(OH)2Mon.
9.DE.15Potassic-sadanagaite{K}{Ca2}{Mg3Al2}(Al3Si5O22)(OH)2Mon.
9.DE.15Potassic-pargasite{K}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2Mon.
9.DE.15Potassic-ferro-sadanagaite{K}{Ca2}{Fe2+3Al2}(Al3Si5O22)(OH)2Mon.
9.DE.15Magnesio-fluoro-hastingsite{Na}{Ca2}{Mg4Fe3+}(Al2Si6O22)F2Mon. 2/m : B2/m
9.DE.15Potassic-fluoro-hastingsite{K}{Ca2}{Fe2+4Fe3+}(Al2Si6O22)(F,OH)2Mon. 2/m : B2/m
9.DE.15Potassic-chloro-hastingsite{K}{Ca2}{Fe2+4Fe3+}(Al2Si6O22)(Cl,OH)2Mon. 2/m : B2/m
9.DE.15Fluoro-pargasite{Na}{Ca2}{Mg4Al}(Al2Si6O22)(F,OH)2Mon. 2/m : B2/m
9.DE.15Parvo-mangano-edenite{Na}{CaMn2+}{Mg5}(AlSi7O22)(OH)2Mon. 2/m : B2/m
9.DE.15Potassic-chloro-pargasite{K}{Ca2}{Mg4Al}(Al2Si6O22)(Cl,OH)2
9.DE.15Potassic-ferro-chloro-edenite{K}{Ca2}{Fe2+5}(AlSi7O22)(Cl,OH)2
9.DE.15Potassic-magnesio-hastingsite{K}{Ca2}{Mg4Fe3+}(Al2Si6O22)(OH)2Mon. 2/m : B2/m
9.DE.15Potassic-ferro-pargasite{K}{Ca2}{Fe2+4Al}(Al2Si6O22)(OH)2Mon. 2/m : B2/m
9.DE.15Chromio-pargasite{Na}{Ca2}{Mg4Cr3+}(Al2Si6O22)(OH)2Mon. 2/m : B2/m
9.DE.20Ferro-taramiteNa(CaNa)(Fe2+3Al2)(Al2Si6O22)(OH)2Mon. 2/m : B2/m
9.DE.20Barroisite☐{CaNa}{Mg3Al2}(AlSi7O22)(OH)2Mon.
9.DE.20Ferro-ferri-barroisite☐(CaNa)(Fe2+3Fe3+2)(AlSi7O22)(OH)2
9.DE.20Ferro-ferri-winchite☐[CaNa][Fe2+4(Fe3+,Al)]Si8O22(OH)2
9.DE.20Ferri-barroisite☐(CaNa)(Mg3Fe3+2)(AlSi7O22)(OH)2
9.DE.20Ferro-ferri-taramiteNa(CaNa)(Fe2+3Fe3+2)(Al2Si6O22)(OH)2
9.DE.20Ferro-ferri-katophoriteNa(NaCa)(Fe2+4Fe3+)(Si7Al)O22(OH)2Mon. 2/m : B2/m
9.DE.20Ferro-barroisite☐{CaNa}{Fe2+3Al2}(AlSi7O22)(OH)2Mon. 2/m : B2/m
9.DE.20Ferro-richterite{Na}{CaNa}{Fe2+5}(Si8O22)(OH)2Mon.
9.DE.20Ferro-winchite ☐{CaNa}{Fe2+4Al}(Si8O22)(OH)2Mon.
9.DE.20Ferro-katophorite{Na}{CaNa}{Fe2+4Al}[(AlSi7)O22](OH)2
9.DE.20Ferri-taramiteNa(CaNa)(Mg3Fe3+2)(Al2Si6O22)(OH)2Mon.
9.DE.20Magnesiotaramite{Na}{CaNa}{Mg3AlFe3+}(Al2Si6O22)(OH)2Mon.
9.DE.20Richterite{Na}{NaCa}{Mg5}(Si8O22)(OH)2Mon.
9.DE.20Winchite☐{CaNa}{Mg4Al}(Si8O22)(OH)2Mon.
9.DE.20Taramite{Na}{CaNa}{Mg3Al2}(Al2Si6O22)(OH)2Mon. 2/m : B2/m
9.DE.20Fluoro-richterite{Na}{CaNa}{Mg5}(Si8O22)(F,OH)2Mon. 2/m
9.DE.20Katophorite{Na}{CaNa}{Mg4Al}[(AlSi7)O22](OH)2Mon. 2/m : B2/m
9.DE.20Potassic-fluoro-richterite{K}{CaNa}{Mg5}(Si8O22)(F,OH)2Mon.
9.DE.20Potassic-richteriteK[CaNa][Mg5]Si8O22(OH)2Mon.
9.DE.20Ferri-ghoseite☐[Mn2+Na][Mg4Fe3+]Si8O22(OH)2Mon. 2/m
9.DE.20Ferri-winchite☐[CaNa][Mg4(Fe3+,Al)]Si8O22(OH)2Mon. 2/m : B2/m
9.DE.20Fluoro-taramite{Na}{CaNa}{Mg3Al2}(Al2Si6O22)F2Mon. 2/m : B2/m
9.DE.25Arfvedsonite[Na][Na2][Fe2+4Fe3+]Si8O22(OH)2Mon. 2/m : B2/m
9.DE.25EckermanniteNaNa2(Mg4Al}Si8O22(OH)2Mon. 2/m : B2/m
9.DE.25Ferro-eckermanniteNaNa2(Fe2+4Al)Si8O22(OH)2Mon.
9.DE.25Ferro-glaucophane◻[Na2][Fe2+3Al2]Si8O22(OH)2Mon.
9.DE.25Glaucophane◻[Na2][Mg3Al2]Si8O22(OH)2Mon.
9.DE.25Potassic-mangani-leakeite[(Na,K)][Na2][Mg2Mn3+2Li]Si8O22(OH)2Mon.
9.DE.25Mangano-ferri-eckermannite[Na][Na2][Mn2+4(Fe3+)]Si8O22(OH)2Mon.
9.DE.25Ferri-leakeite[Na][Na2][Mg2Fe3+2Li]Si8O22(OH)2Mon.
9.DE.25Magnesio-riebeckite◻{Na2}{Mg3Fe3+2}(Si8O22)(OH)2Mon.
9.DE.25Magnesio-arfvedsonite{Na}{Na2}{Mg4Fe3+}(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.25NybøiteNaNa2(Mg3Al2)(AlSi7O22)(OH)2Mon.
9.DE.25Riebeckite◻[Na2][Fe2+3Fe3+2]Si8O22(OH)2Mon. 2/m : B2/m
9.DE.25Mangano-mangani-ungarettiiteNaNa2(Mn2+2Mn3+3)(Si8O22)O2Mon.
9.DE.25Ferro-ferri-nybøiteNaNa2[(Fe2+3,Mg)Fe3+2](AlSi7O22)(OH)2Mon. 2/m : B2/m
9.DE.25Clino-ferro-ferri-holmquistite◻{Li2}{Fe2+3Fe3+2}(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.25Ferri-nybøiteNaNa2(Mg3Fe3+2](AlSi7O22)(OH)2Mon.
9.DE.25Ferro-ferri-leakeite[Na][Na2][Fe2+2Fe3+2Li]Si8O22(OH)2Mon.
9.DE.25Ferro-ferri-fluoro-leakeiteNa(Na2)(Fe2+2Fe3+2Li)(Si8O22)(F)2Mon.
9.DE.25Sodic-ferri-clinoferroholmquistiteNa0.5{Li2}{Fe2+3Fe3+2}(Si8O22)(OH)2Mon.
9.DE.25Magnesio-fluoro-arfvedsonite[Na][Na2][Mg4Fe3+][Si8O22](F,OH)2Mon.
9.DE.25Ferri-pedrizite[Na][Li2][Mg2Fe3+2Li]Si8O22(OH)2Mon.
9.DE.25Potassic-ferri-leakeite[K][Na2][Mg2Fe3+2Li]Si8O22(OH)2Mon. 2/m : B2/m
9.DE.25Fluoro-nybøiteNaNa2(Mg3Al2)(AlSi7O22)(F,OH)2Mon. 2/m : B2/m
9.DE.25Mangani-dellaventuraite{Na}{Na2}{MgMn3+2LiTi4+}Si8O22O2Mon. 2/m : B2/m
9.DE.25Fluoro-pedriziteNaLi2(Mg2Al2Li)(Si8O22)F2Mon. 2/m : B2/m
9.DE.25Potassic-arfvedsonite[(K,Na)][Na2][Fe2+4Fe3+]Si8O22(OH)2Mon. 2/m : B2/m
9.DE.25Mangani-obertiiteNa(Na2)(Mg3Mn3+Ti)(Si8O22)O2Mon. 2/m : B2/m
9.DE.25Potassic-magnesio-fluoro-arfvedsonite[(K,Na)][Na2][Mg4Fe3+][Si8O22][(F,OH)2]
9.DE.25Ferro-ferri-pedrizite[Na][Li2][Fe2+2Fe3+2Li]Si8O22(OH)2Mon. 2/m : B2/m
9.DE.25Potassic-magnesio-arfvedsonite[K][Na2][Mg4Fe3+]Si8O22(OH)2Mon. 2/m : B2/m
9.DE.25PedriziteNaLi2(LiMg2Al2)(Si8O22)(OH)2Mon. 2/m : B2/m
9.DE.25Ferro-pedriziteNaLi2(Fe2+2Al2Li)Si8O22(OH)2Mon. 2/m : B2/m
9.DE.25Fluoro-leakeiteNaNa2(Mg2Al2Li)(Si8O22)F2Mon. 2/m : B2/m
9.DE.25Ferro-ferri-obertiiteNaNa2(Fe2+3Fe3+Ti)Si8O22O2Mon. 2/m : B2/m

Related Minerals - Dana Grouping (8th Ed.)Hide

66.1.3a.4Alumino-magnesio-hornblende☐{Ca2}{Mg4Al}(AlSi7O22)(OH)2
66.1.3a.6Aluminotschermakite☐{Ca2}{Mg3Al2}(Al2Si6O22)(OH)2Mon.
66.1.3a.10Edenite{Na}{Ca2}{Mg5}(AlSi7O22)(OH)2Mon.
66.1.3a.12Pargasite{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2Mon.
66.1.3a.16Magnesiosadanagaite{Na}{Ca2}{Mg3Al2}(Al3Si5O22)(OH)2Mon. 2/m
66.1.3a.18Kaersutite{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2 Mon.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

14.6.1CombeiteNa2Ca2(Si6O18)0.5Trig. 3m (3 2/m) : R3m
14.6.2PectoliteNaCa2Si3O8(OH)Tric. 1 : P1
14.6.3Pectolite-M2abcNaCa2[HSi3O9]
14.6.4DenisoviteCa2(K,Na)Si3O8(F,OH)2Mon.
14.6.5TokkoiteK2Ca4[Si7O18(OH)](OH,F)Tric.
14.6.6MountainiteKNa2Ca2[Si8O19(OH)] · 6H2OMon. 2/m : P2/b
14.6.7RhodesiteKHCa2Si8O19 · 5H2OOrth. mmm (2/m 2/m 2/m)
14.6.8MiseriteK1.5-x(Ca,Y,REE)5(Si6O15)(Si2O7)(OH,F)2 · yH2OTric.
14.6.9ÅkermaniteCa2Mg(Si2O7)Tet. 4 2m : P4 21m
14.6.10MonticelliteCaMgSiO4Orth.
14.6.11MerwiniteCa3Mg(SiO4)2Mon. 2/m : P21/b
14.6.12DiopsideCaMgSi2O6Mon. 2/m : B2/b

Other InformationHide

Health Risks:
Asbestiform varieties of tremolite can cause lung disease when inhaled, as with other species of asbestos minerals.

References for TremoliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Höpfner, J.G.A. (1789) I. “Ueber die Klassifikation der Fossilien in einem Schreiben des Herausgebers an Herrn Dr. Karsten in Halle. II. “Versuch einer neuen Classifikationsmethode der Stein- und Erdarten, nach den neuesten chemischen Erfahrungen". Magazin für die Naturkunde Helvetiens: 4: 255-332.
Ross, M., Smith, W.L., Ashton, W.H. (1968) Triclinic talc and associated amphiboles from Gouverneur mining district, New York. American Mineralogist 53: 763-765.
Hawthorne, F.C., Grundy, H.D. (1976) The crystal chemistry of the amphiboles; IV, X-ray and neutron refinements of the crystal structure of tremolite. The Canadian Mineralogist: 14: 334-345.
Hawthorne, F.C., Della Ventura, G., Robert, J.-L. (1996) Short-range order of (Na,K) and Al in tremolite: An infrared study. American Mineralogist: 81: 782-784.
Deer, W.A., Howie, R.A., J. Zussman. (1997) Rock-forming Minerals: Double-Chain Silicates, Volume 2B;. Geological Society of London.
Mandarino, J.A. (1998) The Second List of Additions and Corrections to the Glossary of Mineral Species (1995). The Amphibole Group. Mineralogical Record: 29: 169-174.
Ishida, K. Hawthorne, F.C., Ando, Y. (2002) Fine structure of infrared OH-stretching bands in natural and heat-treated amphiboles of the tremolite-ferro-actinolite series. American Mineralogist: 87: 891-898.
Roth, P. (2006) The early history of tremolite. Axis: 2(3): 1-10.
Hawthorne, F.C., Oberti, R. (2006) On the classification of amphiboles. The Canadian Mineralogist: 44(1): 1-21.

Internet Links for TremoliteHide

Localities for TremoliteHide

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 ListShow